View source for Jan Lammers

{{Short description|Dutch racing driver (born 1956)}}
{{About|the Dutch racing driver|the Dutch sprinter|Jan Lammers (athlete)|the Dutch footballer|Jan Lammers (footballer)}}
{{Use dmy dates|date=April 2022}}
{{BLP sources|date=July 2025}}
{{Infobox F1 driver
| name = Jan Lammers
| image = Jan Lammers LeMans24 2017.jpg
| caption = Lammers at the [[2017 24 Hours of Le Mans]]
| nationality = {{flagicon|NLD}} Dutch
| birth_date = {{birth date and age|1956|6|2|df=y}}
| birth_place = [[Zandvoort]], Netherlands
| Years = {{F1|1979}}–{{F1|1982}}, {{F1|1992}}
| Team(s) = [[Shadow Racing Team|Shadow]], [[ATS (wheels)|ATS]], [[Ensign (racing team)|Ensign]], [[Theodore Racing|Theodore]] and [[March Engineering|March]]
| Races = 41 (23 starts)
| Championships = 0
| Wins = 0
| Podiums = 0
| Poles = 0
| Fastest laps = 0
| Points = 0
| First race = [[1979 Argentine Grand Prix]]
| First win = 
| Last win = 
| Last race = [[1992 Australian Grand Prix]]
| career template1 = 
{{Infobox Le Mans driver|embed=yes
|  Years = {{24hLM|1983}}–{{24hLM|1984}}, {{24hLM|1987}}–{{24hLM|1990}}, {{24hLM|1992}}–{{24hLM|1993}}, {{24hLM|1998}}–{{24hLM|2008}}, {{24hLM|2011}}, {{24hLM|2017}}, {{24hLM|2018}}
|  Team(s) = [[Richard Lloyd Racing]], [[GTi Engineering]], [[Tom Walkinshaw Racing]], [[Toyota]] Team [[TOM'S|Tom's]], [[Racing for Holland]], Hope Racing, Racing Team Nederland
|  Best Finish = 1st <small>({{24hLM|1988}})</small>
|  Class Wins = 1 <small>({{24hLM|1988}})</small>
}}
}}
'''Johannes Antonius''' "'''Jan'''" '''Lammers''' (born 2 June 1956) is a Dutch [[racecar driver]], most notable for winning the [[1988 24 Hours of Le Mans]] [[FIA World Endurance Championship|world endurance race]], for [[Silk Cut]] [[Jaguar Cars|Jaguar]]/[[Tom Walkinshaw Racing|TWR]]; after four seasons in [[Formula One]] racing, from 1979 through 1982, for the F1 teams of [[Shadow Racing Cars|Shadow]], [[ATS Wheels|ATS]], [[Ensign Racing|Ensign]] and [[Theodore Racing|Theodore]], respectively. After a world-record setting ten-year hiatus, Lammers made a brief Formula One comeback, for two races, with team [[March Engineering|March]] in 1992. Aside from racing in these two of the highest leagues of global auto-sports, Lammers has raced in an exceptionally wide number of racing series and competitions, domestic and abroad, over four decades.

Later in life, Lammers became a team owner as well, first setting up his own Formula Opel Lotus team, Vitaal Racing, winning the EFDA Opel Lotus Euroseries with Peter Kox in 1989, then creating the [[Racing for Holland]] outfit that raced in sportscars class in 2001–2007. Between 2005 and 2009, he was the seatholder of the [[A1 Team Netherlands|Dutch A1 Grand Prix team]]. During his Racing for Holland days, Lammers combined racing and management duties to win the [[2002 FIA Sportscar Championship|2002]] and [[2003 FIA Sportscar Championship|2003]] [[FIA Sportscar Championship]].

One of the most versatile drivers in modern motor racing history, Lammers started in touring cars, to become the youngest Dutch champion in history in 1973 while repeating the act in 1976. He also raced in the European [[Renault 5 Turbo]] Cup, taking the 1983 and 1984 European titles. As a single-seater driver, his steps towards [[Formula One]] include securing the title in the [[1978 FIA European Formula 3 Championship|1978]] [[European Formula 3 Championship]]. He remains the only Dutch driver to have done so. At the zenith of his career in [[Group C|Group C sports-prototypes]], Lammers lifted the crown in the [[1992 All Japan Sports Prototype Car Endurance Championship|1992]] [[All-Japan Sports Prototype Championship|Japanese Sportscar Championship]].

Lammers has further raced in [[Formula Ford]], [[Formula Two|Formula 2]], [[IndyCar Series|IndyCar racing]], [[International Formula 3000|International F3000]], [[Super Formula Championship#Formula 3000 (1987–1995)|Japanese F3000]], the [[British Touring Car Championship]] (BTCC), [[BPR Global GT Series|BPR Global GT]], [[FIA GT Championship|FIA GT]], the [[European Le Mans Series]], the [[IMSA SportsCar Championship]], the [[American Le Mans Series]], [[Grand-Am Road Racing|Grand-Am]], and the [[Dakar Rally]].

Guest appearances include the [[Grand Prix Masters|Grand Prix Masters for retired F1 drivers]], the [[BMW M1 Procar Championship|BMW M1 Procar Series]], the [[Dutch Supercar Challenge]], the [[Dubai 24 Hour]]s and [[Gulf 12 Hours]] endurance races, the VW Scirocco R-Cup and the Dutch domestic [[Tulpenrallye]].

In recent years, Lammers was an important figurehead / ambassador for reviving the [[Dutch Grand Prix|Dutch Formula One GP]] on the coastal dunes situated [[Circuit Zandvoort|Zandvoort circuit]], achieved since 2021.

==Early career==

=== Touring cars ===
[[File:Autoraces op Zandvoort Jantje Lammers (31) won toerwag tot f 10000,--, Bestanddeelnr 927-2011.jpg|alt=Lammers racing the Simca Rallye 2 at Zandvoort.|left|thumb|Lammers racing the Simca Rallye 2 at Zandvoort]]
Born in Zandvoort, Lammers grew up washing cars at the nearby school for advanced and anti-skid driving skills training, run by Dutch touring-car legend [[Rob Slotemaker]]. Encouraged by Slotemaker, and while still under-age for a regular Dutch driving licence, the teenager nicknamed 'Jantje' ('Little John') was also hired to teach drivers on a private, closed track, how to safely recover a car from a skid situation. Having recognised Lammers' talent, Slotemaker set him up in a [[Simca Rallye 2]] for the 7,500-9,000 guilder Group 1 production car class in the 1973 Dutch Touring Car Championship.<ref>{{Cite web |last=De Jong |first=Frank |title=Nederlands Toerwagen Kampioenschap - 1973 |url=http://touringcarracing.net/Pages/1973%20NTK.html |access-date=2022-11-22 |website=touringcarracing.net}}</ref> At 16 years of age, Lammers won his first-ever car race and continued to take the season title in his rookie year, becoming the youngest Dutch national auto racing champion in history.

Two more years in the Simca followed in a revised 8,000-10,000 guilder class, Lammers taking four more wins in 1974 but narrowly missing out on a title repeat.<ref>{{Cite web |last=De Jong |first=Frank |title=Nederlands Toerwagen Kampioenschap - 1974 |url=http://touringcarracing.net/Pages/1974%20NTK.html |access-date=2022-11-22 |website=touringcarracing.net}}</ref> Wins elude him in 1975 but his name has already been made.<ref>{{Cite web |last=De Jong |first=Frank |title=Nederlands Toerwagen Kampioenschap - 1975 |url=http://touringcarracing.net/Pages/1975%20NTK.html |access-date=2022-11-22 |website=touringcarracing.net}}</ref> In 1976, he switched to an Opel Dealer Team Holland-run Opel Kadett GT/E to take his second Dutch title.<ref>{{Cite web |last=De Jong |first=Frank |title=Nederlands Toerwagen Kampioenschap - 1976 |url=http://touringcarracing.net/Pages/1976%20NTK.html |access-date=2022-11-22 |website=touringcarracing.net}}</ref>

== Road to Formula One ==

=== Formula Ford ===
Dovetailing his 1976 touring-car campaign with a first season in [[Formula Ford]], Lammers quickly realises his future is in single-seaters. Driving a [[Crosslé Car Company|Crosslé]] in the Benelux, German and European Championship, the touring-car boy wonder surprises everyone by grabbing pole position at his first race, winning at the [[Jyllands-Ringen|Jyllandring]] and Mengen and shining in the soaking wet finale of the [[Formula Ford Festival]] at [[Brands Hatch]].<ref name="De Roos">{{Cite web |last1=De Roos |first1=Arjan |last2=Diepraam |first2=Mattijs |title=8W - Who? - Jan Lammers |url=http://8w.forix.com/lammers.html |access-date=2022-11-22 |website=8w.forix.com}}</ref>

=== Formula 3 ===
[[File:Paasraces Zandvoort Jan Lammers werd eerste formule 3 race, Bestanddeelnr 929-6426.jpg|alt=Lammers showing the way around at a wet Zandvoort in Formula 3.|left|thumb|Lammers showing the way around at a wet Zandvoort in Formula 3]]
Stepping up with Hawke to [[Formula Three|Formula 3]] in [[1977 FIA European Formula 3 Championship|1977]] proves to be a false dawn, as the Hawke proves no match for the Marches and the Ralts. For 1978, he switches to the Racing Team Holland outfit run by [[Alan Docking Racing|Alan Docking]], with fellow future Formula 1 driver [[Huub Rothengatter]] and later Indy 500 winner [[Arie Luyendijk]] as his team mates. This is an inspired move as it leads to Lammers winning the [[1978 FIA European Formula 3 Championship|1978 European Formula 3 Championship]] after a close battle with Swede [[Anders Olofsson]], while beating highly touted rivals such as [[Alain Prost]], [[Nelson Piquet]] and Nigel Mansell. Lammers takes wins at [[Circuit Zandvoort|Zandvoort]], [[Circuit de Nevers Magny-Cours|Magny-Cours]], [[Karlskoga Motorstadion|Karlskoga]] and in the famous Lotteria race at [[Monza Circuit|Monza]] to lift the crown. At the time, leading British magazine ''[[Autosport]]'' predicts: "He just has to be a World Champion of the eighties."<ref name="De Roos"/>

=== Formula 2 ===
Having received an offer from the works [[March Engineering|March]] [[Formula Two|Formula 2]] team, Lammers decides to jump the category to go straight into [[Formula One]] with [[Shadow Racing Cars|Shadow]] in [[1979 Formula One season|1979]]. He will make his single Formula 2 appearance in 1980, driving a March-BMW in his home race at [[Circuit Zandvoort|Zandvoort]], where he retires from third place.<ref name="De Roos"/>

== Formula One ==
[[File:Meisje houdt paraplu boven het hoofd van Jan Lammers, Bestanddeelnr 930-4093.jpg|thumb|Lammers at the [[1979 Dutch Grand Prix]], debuting in F1]]
Lammers spent four seasons in [[Formula One]], racing largely uncompetitive machinery and failing to score a World Championship point in any of his 41 appearances.<ref>{{Cite web |title=Jan Lammers Career History {{!}} FIA Results and Statistics |url=https://fiaresultsandstatistics.motorsportstats.com/drivers/jan-lammers/career |access-date=2022-11-22 |website=fiaresultsandstatistics.motorsportstats.com |archive-date=27 November 2022 |archive-url=https://web.archive.org/web/20221127044246/https://fiaresultsandstatistics.motorsportstats.com/drivers/jan-lammers/career |url-status=dead }}</ref> He was considered talented, however; Lammers only narrowly missed out on the chance to join [[Scuderia Ferrari|Ferrari]] in 1982 to replace [[Gilles Villeneuve]], who was killed at [[Circuit Zolder|Zolder]] earlier in the year. The drive went to [[Patrick Tambay]] instead.
[[File:Jan Lammers presenteert de Samson Shadow DN 9 B Formule I op Jan Lammers in zi, Bestanddeelnr 930-0357.jpg|alt=Lammers presenting the Samson-liveried Shadow DN9B at Zandvoort.|left|thumb|Lammers presenting the Samson-liveried Shadow DN9B at Zandvoort]]
In [[1979 Formula One season|1979]], Lammers and fellow rookie [[Elio de Angelis]] joined Shadow, but the team led by American [[Don Nichols]] was close to shutting down; the pair failed to make an impact with a poor car, with de Angelis scoring the team's only points that year, coming in fourth place at Watkins Glen. Lammers' best result was [[1979 Canadian Grand Prix|a ninth place in the Canadian GP]]. Both were invited by [[Colin Chapman]] to test for [[Lotus Cars|Lotus]], with [[Elio de Angelis|De Angelis]] getting the job for [[1980 Formula One season|1980]]; Lammers was unwilling to wait for Chapman's decision. Instead, he decided to sign for the [[ATS Wheels|German-owned ATS team]].
[[File:Kenny Roberts (wereldkampioen 500cc) (links) in gesprek met Jan Lammers bij dien, Bestanddeelnr 930-9866.jpg|alt=Multiple 500cc champion Kenny Roberts chats with Lammers at the 1980 Dutch GP.|thumb|Multiple 500cc champion Kenny Roberts chats with Lammers at the 1980 Dutch GP]]
The underfunded outfit handed Lammers the old D3 car while team leader [[Marc Surer]] debuted with the new [[ATS D4|D4]], but when Surer broke his legs in an accident, Lammers took the D4. He immediately qualified fourth on the grid at Long Beach but the car broke on the opening lap of the race.<ref>{{Cite web |last=Koense |first=Mark |title=De sensatie van Long Beach |url=https://www.rtlgp-magazine.nl/artikelen/item/formule-1-jan-lammers-25-jaar-geleden.html |access-date=2022-11-22 |website=www.rtlgp-magazine.nl}}</ref> Other notable ATS performances included battling [[Jody Scheckter]]'s [[Scuderia Ferrari|Ferrari]] at [[Circuit Zolder|Zolder]], and retiring from a points-scoring position at [[Circuito del Jarama|Jarama]]. When Surer made a return to ATS, Lammers moved to [[Ensign Racing|Ensign]]. Meanwhile, his former teammate [[Elio de Angelis|De Angelis]] had a fine season at Lotus while Lammers failed to qualify the cumbersome Ensign on several occasions.

For [[1981 Formula One World Championship|1981]], Lammers was invited for a test to become [[Nelson Piquet]]'s teammate at [[Brabham]], but team principal [[Bernie Ecclestone]] chose to go with Mexican pay driver [[Héctor Rebaque|Hector Rebaque]].<ref name="De Roos"/> Instead, Lammers rejoined [[ATS Wheels|ATS]] and performed well in the controversial non-championship [[1981 South African Grand Prix|South African GP]] at Kyalami; he fought [[Elio de Angelis|De Angelis]] for second place until being hit by brake problems. When Swede [[Slim Borgudd]] arrived with healthy funding from pop band [[ABBA]], Lammers was made to gave up his seat. [[File:Lammers at 1982 Dutch Grand Prix (7).jpg|thumb|left|Jan Lammers driving the Theodore TY02 at the Dutch Grand Prix in 1982]]
[[File:Lammers at 1982 Dutch Grand Prix (2).jpg|alt=Lammers in talks at the 1982 Dutch Grand Prix.|thumb|Lammers in talks at the 1982 Dutch Grand Prix]]
In [[1982 Formula One World Championship|1982]], Lammers switched to [[Theodore Racing|Theodore]] but the team was largely underfunded. At [[1982 Monaco Grand Prix|Monaco]], Lammers' TY02 had to stay on nude rims for a day because the team did not have any tyres. Still seen as a natural talent, he was asked by [[Renault in Formula One|Renault]] to replace the injured [[Alain Prost|Prost]] at [[1982 Detroit Grand Prix|Detroit]], only for the championship leader to recover in time. Lammers stepped back into the Theodore, but before the start of the first session, he was approached by Ferrari to replace [[Gilles Villeneuve]] from [[Circuit Zandvoort|Zandvoort]] on. In a twist of fate, the Theodore's throttle stuck during the session, causing Lammers to hit the wall and break his thumb. As a result, [[Patrick Tambay]] signed the Ferrari contract.<ref name="De Roos"/> At Zandvoort, instead of driving the Ferrari, Lammers took part in his last Grand Prix before [[Tommy Byrne (racing driver)|Tommy Byrne]] took over the seat.

In late [[1985 Formula One World Championship|1985]], Lammers was given a test by [[Toleman]] at [[Circuito do Estoril|Estoril]] but with the team unable to get a tyre contract for 1986, plans for a Formula One return fell through. In 1989, another Formula One opportunity came to nothing when Lammers was asked by Ken [[Tyrrell Racing|Tyrrell]] to replace [[Michele Alboreto]], but the Dutchman decided to stick with [[Tom Walkinshaw Racing|TWR Jaguar]], and Tyrrell signed [[Jean Alesi]] instead.<ref name="De Roos"/>

Then in [[1992 Formula One World Championship|1992]], Lammers made a surprise Formula One comeback when he stepped in at [[March Engineering|March]] for the final two races of the season – a full ten years after his initial final Grand Prix, a record career gap in Formula One. Replacing [[Karl Wendlinger]], Lammers lapped sixth fastest in wet free practice at [[Suzuka International Racing Course|Suzuka]], before retiring from the race with a broken gearbox. At [[1992 Australian Grand Prix|Adelaide]], he finished 12th. Looking set to continue with March in 1993, his Formula One ambitions received a blow when the team was denied an engine deal by Ilmor unless they paid their bills. This left Lammers as a spectator at [[Kyalami]], after which the team folded.<ref>{{Cite web |date=2019-09-26 |title=Jan Lammers {{!}} {{!}} The "forgotten" drivers of F1 |url=https://www.f1forgottendrivers.com/drivers/jan-lammers/ |access-date=2022-11-22 |website=www.f1forgottendrivers.com |language=en-US}}</ref>

Another Formula One option hit the rocks when Lammers was signed by the [[DAMS]] [[Formula 3000|F3000]] team for its debut season in [[1996 Formula One World Championship|1996]], having already tested their [[DAMS GD-01|GD-01]] car all through 1995. The project remained stillborn when DAMS fails to gather sufficient funding.<ref name="De Roos"/>

== Sportscars ==
Fed up with driving inferior machines at the back of the [[Formula One]] grid, Lammers decides to switch to [[Sports car racing|sportscar racing]] where he becomes a mainstay for the next three decades, both as a driver and a team owner.<ref>{{Cite web |date=2020-04-01 |title=Feature: 10 drivers who did better in sportscars after leaving F1 |url=https://www.motorsportweek.com/2020/04/01/feature-10-drivers-who-did-better-in-sportscars-after-leaving-f1/ |access-date=2022-11-22 |website=Motorsport Week |language=en-GB}}</ref> His time in [[Group C]] includes seasons with [[Richard Lloyd Racing]]'s private [[Porsche 956]], the works [[Jaguar Cars|Jaguar]] team and the works [[Toyota]] team, while in the days of [[LMP900]] and [[Le Mans Prototype|LMP1]], Lammers runs his own [[Racing for Holland]] team with the Japanese [[Dome S101]] chassis. His final call at [[Circuit de la Sarthe|Le Mans]] comes in [[2017 24 Hours of Le Mans|2017]] and [[2018 24 Hours of Le Mans|2018]] when he races the [[Racing Team Nederland]] [[Dallara P217|Dallara]] in [[LMP2]], sharing with [[Rubens Barrichello]] and [[Jumbo (supermarket)|Jumbo Supermarkets]] CEO and team owner Frits van Eerd.<ref>{{Cite web |title=Group C's Top 10 Drivers – Part 1 |url=https://www.goodwood.com/grr/event-coverage/festival-of-speed/2016/6/group-cs-top-10-drivers--part-1/ |access-date=2022-11-22 |website=www.goodwood.com}}</ref>

=== Prototypes ===
Having turned his back on [[Formula One]], Lammers starts his [[World Sportscar Championship]] career in [[1983 World Sportscar Championship|1983]] by joining top Porsche privateer [[Richard Lloyd Racing]], taking several podium finishes with [[Thierry Boutsen]], [[Keke Rosberg]] and [[Jonathan Palmer]], while finishing [[1983 24 Hours of Le Mans|sixth on his Le Mans debut]]. In [[1984 World Sportscar Championship|1984]], he is paired with Palmer, and the Canon-liveried [[Porsche 956|956]] takes victory over the works cars at [[Brands Hatch]]. The two add podiums at [[Monza Circuit|Monza]], the [[Nürburgring]], [[Sandown Park, Melbourne|Sandown Park]] and [[Imola Circuit|Imola]], and retire from [[1984 24 Hours of Le Mans|Le Mans]] in a winning position.
[[File:Jaguar XJR-9 - Silk Cut Jaguar - 1988.jpg|alt=Teaming up with John Watson at Silk Cut Jaguar in 1987.|left|thumb|Teaming up with John Watson at Silk Cut Jaguar in 1987]]
A mid-season switch sees Lammers snapped up by [[Tom Walkinshaw]] at [[Tom Walkinshaw Racing|TWR Jaguar]], and on his debut for the team at a very hot [[Shah Alam Circuit|Shah Alam]] in Malaysia he brings home the Jag in second place. Meanwhile, he makes his [[IMSA GT Championship|IMSA GTP]] debut racing a March-Buick at Miami with [[Roberto Guerrero]]. In the [[1986 24 Hours of Daytona|1986 Daytona 24 Hours]], driving the BF Goodrich [[Porsche 962]], he is heading for victory when his brakes fail, leading to a sizeable crash that he escapes from. Later in the season, when his promising IndyCar adventure collapses with the disappointing Eagle, Walkinshaw is quick to lure Lammers back to TWR. The Dutchman is immediately competitive with second at [[Circuit de Spa-Francorchamps|Spa]] and third at [[Circuito de Jerez|Jerez]], before racing for [[Nissan]] at [[Watkins Glen International|Watkins Glen]] in [[IMSA GT Championship|IMSA GTP]].

In [[1987 World Sportscar Championship|1987]], Lammers joins TWR Jaguar – now sponsored by [[Silk Cut]] – as a proper works driver, and is teamed with Grand Prix veteran [[John Watson (racing driver)|John Watson]]. They win at [[Circuito del Jarama|Jarama]], [[Monza Circuit|Monza]] and [[Fuji Speedway|Fuji]] and take podiums at [[Silverstone Circuit|Silverstone]], [[Brands Hatch]] and [[Circuit de Spa-Francorchamps|Spa]]. At [[1987 24 Hours of Le Mans|Le Mans]], third driver [[Win Percy]] crashes their car out of the race. Team orders mean that they finish second in the championship.

[[1988 World Sportscar Championship|1988]] would become Lammers' most successful season in Group C racing. Now paired with ex-[[Lotus Cars|Lotus]] Formula One driver [[Johnny Dumfries]], the two finish second at [[Circuit de Spa-Francorchamps|Spa]] and third at [[Brno Circuit|Brno]], before being joined by [[Andy Wallace (racing driver)|Andy Wallace]] at the [[1988 24 Hours of Le Mans|Le Mans 24 Hours]]. Lammers drives for 13 hours to be the anchor in a popular win for TWR Jaguar, the first for the marque since 1957. For this, he is congratulated by [[Elizabeth II|Queen Elizabeth II]] and rewarded with the title of Honorary Member of the [[British Racing Drivers' Club|BRDC]]. In IMSA, Lammers is part of the crew that wins the [[1988 24 Hours of Daytona|Daytona 24 Hours]], after he is moved over from his retired car to join [[Martin Brundle]], [[Raul Boesel]] and [[John Nielsen (racing driver)|John Nielsen]] in the lead Jaguar entry, winning the race. With regular teammate [[Davy Jones (racing driver)|Davy Jones]], Lammers wins at [[Del Mar Fairgrounds|Del Mar]] and ends up on the podium at [[West Palm Beach, Florida|West Palm Beach]], [[Lime Rock Park|Lime Rock]], [[Mid-Ohio Sports Car Course|Mid-Ohio]] and [[Sonoma Raceway|Sears Point]].<ref>{{Cite web |title=Sportscar Heroes: Jan Lammers, Part 1 {{!}} dailysportscar.com |url=https://www.dailysportscar.com/2020/06/02/sportscar-heroes-jan-lammers-part-one.html |access-date=2022-11-22 |website=www.dailysportscar.com|date=2 June 2020 }}</ref>
[[File:Toyota TS010 - Jan Lammers & Andy Wallace leads team mates Geoff Lees & Hitoshi Ogawa at the 1992 SWC round, Silverstone (50093222046).jpg|alt=The Jan Lammers/Andy Wallace Toyota TS010 leads the example of Geoff Lees/Hitoshi Ogawa at the 1992 FIA WSC round at Silverstone.|thumb|The Jan Lammers/Andy Wallace Toyota TS010 leads the example of Geoff Lees/Hitoshi Ogawa at the 1992 FIA WSC round at Silverstone.]]
In [[1989 World Sportscar Championship|1989]], the Jaguars were outclassed by the resurgent [[Sauber Mercedes|Mercedes]] effort, with Lammers only managing to score a second place at [[Circuito del Jarama|Jarama]] with [[Patrick Tambay]]. In the US, Lammers is more successful, winning in [[Portland, Oregon|Portland]] and [[Del Mar Fairgrounds|Del Mar]], taking second in the [[1989 24 Hours of Daytona|Daytona 24 Hours]], [[Lime Rock Park|Lime Rock]], [[Mid-Ohio Sports Car Course|Mid-Ohio]] and [[Road America]] and third at [[Sonoma Raceway|Sears Point]] and [[Topeka, Kansas|Topeka]]. The following year, Lammers wins the [[1990 24 Hours of Daytona|Daytona 24 Hours]] again, this time paired with [[Andy Wallace (racing driver)|Andy Wallace]] and [[Davy Jones (racing driver)|Davy Jones]], before taking third in the [[1990 12 Hours of Sebring|Sebring 12 Hours]]. In the [[1990 World Sportscar Championship|WSC]], however, Jaguar's new turbo engine proves fast but unreliable, and together with Wallace, Lammers only picks up a pair of second places. Switching to the proven atmospheric V12 for [[1990 24 Hours of Le Mans|Le Mans]], Jaguar takes the double, but Lammers is in the second Jaguar across the line, having to recover from an earlier crash by teammate [[Franz Konrad (racing driver)|Franz Konrad]].

Having opted for a switch to [[Toyota]], Lammers decides to wait in the wings for the new programme to come alive in 1992. In the [[1992 World Sportscar Championship|World Championship]], mated with [[Geoff Lees (racing driver)|Geoff Lees]], Lammers takes two podium finishes, second at [[Suzuka International Racing Course|Suzuka]] and third at [[Circuit de Nevers Magny-Cours|Magny-Cours]]. In the [[1992 All Japan Sports Prototype Car Endurance Championship|Japanese Sports-Prototype Championship]], however, two wins at [[Fuji Speedway|Fuji]] and [[Mine Circuit|Mine]] add up to another title for the Dutchman. One more Toyota appearance follows in 1993, finishing sixth for the Japanese constructor in the [[1993 24 Hours of Le Mans|Le Mans 24 Hours]].
[[File:Courage C36 - Mario Andretti, Jan Lammers & Derek Warwick at the 1996 Le Mans (51701106517).jpg|alt=With Mario Andretti and Derek Warwick in the Courage-Porsche C36 at the 1996 Le Mans 24 Hours.|left|thumb|With Mario Andretti and Derek Warwick in the Courage-Porsche C36 at the 1996 Le Mans 24 Hours]]
In 1995, Lammers returns to IMSA to compete at [[1995 24 Hours of Daytona|Daytona]] and [[1995 12 Hours of Sebring|Sebring]] in the Auto Toy Store [[Spice SE90P|Spice-Chevrolet SE90]]. With [[Andy Wallace (racing driver)|Andy Wallace]], he wins the Sebring 12 Hours on the road but a timekeeping error declares the Fermín Velez/Andy Evans/Eric van de Poele Ferrari 333SP as the winner, while as a guest driver, Lammers joins [[Derek Warwick]] and [[Mario Andretti]] in a [[Courage C36|Courage-Porsche C36]] to finish sixth in the [[1996 24 Hours of Le Mans|1996 Le Mans 24 Hours]].

In 1999 and 2000, Lammers returns to prototype racing, as [[Konrad Motorsport]] moves up to the LMP class with a Ford-engined [[Lola B98/10]], followed by a [[Lola B2K/10|B2K/10]], while in the US he joins J&P Motorsports to race a [[Panoz LMP-1 Roadster-S]]. In the meantime, he progresses with setting up his own team for 2001. At Konrad, teaming up with countrymen [[Tom Coronel]] and [[Peter Kox]] serves as a prequel to that.
[[File:Dome S101 - Jan Lammers, Andy Wallace & John Bosch at Ford Chicane at the 2003 Le Mans (2) (40364314560).jpg|alt=Lammers in the Dome S101 in the Ford chicane at the 2003 Le Mans 24 Hours.|thumb|Lammers in the Dome S101 in the Ford chicane at the 2003 Le Mans 24 Hours]]
Lammers embarks on a new era of sportscar success in 2001 when he rekindles his ties with [[Dome (constructor)|Japanese manufacturer Dome]] to race their Judd-engined [[Dome S101|S101]], entering it in the new [[FIA Sportscar Championship]] and the [[2011 24 Hours of Le Mans|Le Mans 24 Hours]] with young Dutch-born but Belgian-licensed Val Hillebrand as his teammate. For Le Mans, the Dutchman offers small segments of bodywork to small, private sponsors, giving the car the look of a driving chequered flag. A contribution of 2200 euros is enough to become a [[Racing for Holland]] sponsor. Lammers and Hillebrand dominate the final round of [[2001 FIA Sportscar Championship|the championship]] before going into the new season as clear favourites, while placing themselves amongst the Audis at [[2001 24 Hours of Le Mans|Le Mans]]. With three wins and five podiums Lammers and Hillebrand indeed [[2002 FIA Sportscar Championship|take the 2002 title]] in the leading SR1 class, before [[2003 FIA Sportscar Championship|doubling up in 2003]], again with three wins and five podiums. Meanwhile in 2002, Lammers races the [[Crawford SSC2K]] at [[2002 24 Hours of Daytona|Daytona]] and joins [[Champion Racing|Champion]] for [[2002 12 Hours of Sebring|Sebring]] to take third in their [[Audi R8 (LMP)|Audi R8]].

When the FIA Sportscar Championship collapses after 2003, the Dome continues at Le Mans, where Lammers takes [[2004 24 Hours of Le Mans|seventh in 2004]] along with [[Elton Julian]] and countryman John Bosch, the trio copying the result in [[2005 24 Hours of Le Mans|2005]]. In the meantime, the Dutchman guests at Doran-Lista to take fourth in the [[2004 24 Hours of Daytona|2004 Daytona 24 Hours]] and with [[Dyson Racing]] at [[2004 12 Hours of Sebring|Sebring]] and the [[2004 Petit Le Mans|Petit Le Mans]], finishing third in the latter. In the [[2005 24 Hours of Daytona|2005 Daytona 24 Hours]], Lammers steps into the [[Howard-Boss Motorsports]] [[Crawford DP03]] to claim another US podium with third. Rejoining them for [[2006 24 Hours of Daytona|2006]], their second cooperation gains no results.

With the start of the [[Le Mans series|Le Mans Series]] in [[2005 Le Mans Series season|2005]], Racing for Holland signs up for assorted rounds in 2005, [[2006 Le Mans Series|2006]] and [[2007 Le Mans Series|2007]], but by now the Dome is outclassed by the more recent LMP1 designs. After he shuts down the team while continuing to pay off its debts well into the next decade, Lammers returns as a gun for hire in 2008. In an [[LMP2]] season dominated by [[Jos Verstappen]] and the Van Merksteijn [[Porsche RS Spyder]], Lammers teams up with the Swiss Horag-Lista team's [[Porsche RS Spyder|RS Spyder]] to finish the year fourth in class, along with teammate [[Didier Theys]]. At [[2008 24 Hours of Le Mans|Le Mans in 2008]], he joins Greg Pickett and [[Klaus Graf]] in the [[Charouz Racing System]] Lola-Judd B07/17, but the car fails to finish.
[[File:Racing Team Nederland's Dallara P217 Gibson Driven by Rubens Barrichello, Jan Lammers and Frits van Eerd (36070173231).jpg|alt=Jan Lammers shared the Racing Team Nederland Dallara P217 with Rubens Barrichello and Frits van Eerd.|left|thumb|Jan Lammers shared the Racing Team Nederland Dallara P217 with Rubens Barrichello and Frits van Eerd.]]
Having gone into semi-retirement from 2010, Lammers hooks up with [[Hope Racing]] to race the experimental SwissHyTech Hybrid-engined [[Oreca 01|ORECA 01]], and does one [[2016 Le Mans Cup]] round in the Racing Team Holland [[Ligier JS P3|Ligier-Nissan JSP3]], but waits until 2017 for his final foray in top-level prototype racing, signing up for a three-year spell with [[Racing Team Nederland]], the team funded by Dutch supermarket mogul Frits van Eerd. Racing their [[Dallara P217|Dallara-Gibson P217]] in the LMP2 class of the [[European Le Mans Series]], Lammers and Van Eerd claim a seventh and eighth as their best results in a full [[2017 European Le Mans Series|2017 ELMS season]]. In [[2018 European Le Mans Series|2018]] and [[2019 European Le Mans Series|2019]], Lammers acts as third driver to Van Eerd and [[Giedo van der Garde]] at Le Mans before closing the curtain on his active career.<ref>{{Cite web |title=Sportscar Heroes: Jan Lammers, Part 2 {{!}} dailysportscar.com |url=http://www.dailysportscar.com/2020/06/03/sportscar-heroes-jan-lammers-part-two.html |access-date=2022-11-22 |website=www.dailysportscar.com|date=3 June 2020 }}</ref>

=== GTs ===
On the back of the failed DAMS Formula One project, Lammers joins the [[Team Lotus|Lotus Racing]] outfit for [[BPR Global GT Series|BPR Global GT]] in [[1996 BPR Global GT Series|1996]]. The GTI team is headed by countryman [[Toine Hezemans]] along with Ian Foley and George Howard-Chappell and runs a pair of [[Lotus Esprit V8]]s in the [[Group GT1|GT1]] category. Teamed with Alex Portman, [[Perry McCarthy]], [[Chris Goodwin]], [[Andy Wallace (racing driver)|Andy Wallace]], [[Fabien Giroix]] and Mike Hezemans, he claims pole at the [[Nürburgring]] and takes second at [[Silverstone Circuit|Silverstone]], but apart from that the car proves very unreliable. In [[1997 FIA GT Championship|1997]], its [[Lotus Elise GT1]] successor is outclassed by [[McLaren F1 GTR|McLaren-BMW]] and [[Mercedes-Benz CLK GTR|Mercedes]] in the inaugural [[FIA GT Championship]]. After the Lotus takeover by [[Proton Holdings|Proton]], the GT1 programme is quickly canned.
[[File:Lotus Elise GT1 - Jan Lammers, Mike Hezemans & Alexander Grau at the 1997 Le Mans (51442974508).jpg|alt=With Mike Hezemans and Alexander Grau at the 1997 Le Mans 24 Hours.|thumb|With Mike Hezemans and Alexander Grau at the 1997 Le Mans 24 Hours]]
In 1998, Lammers races the Bitter GT1 for Team Hezemans before switching to GT2 with [[Roock Racing]] and [[Konrad Motorsport]], while helping to develop [[Nissan]]'s new [[Nissan R390 GT1|R390 GT1]] car. At [[1998 24 Hours of Le Mans|Le Mans]], he joins [[Érik Comas|Erik Comas]] and [[Andrea Montermini]] to finish sixth, as the Nissans get beaten by [[Porsche 911 GT1|Porsche's 911 GT1]]. Late in the season, Lammers returns to Konrad to share a [[Porsche 911 GT2|911 GT2]] with Franz Konrad in the [[1998 Petit Le Mans|Petit Le Mans]], followed by a win at [[WeatherTech Raceway Laguna Seca|Laguna Seca]].

Following a five-year GT break, the Dutchman teams up with [[Prodrive]] to drive their [[Ferrari 550 Maranello]] in the [[2003 Petit Le Mans]], finishing fourth in the GTS class, and then in 2008, having closed down his own team, Lammers makes a few guest appearances in GT racing, driving the Spa 24 Hours in the [[Lamborghini Murciélago R-GT]] for the IPB-Spartak team. Meanwhile, he does a full season of [[ADAC GT Masters|ADAC GT]] sharing [[Reiter Engineering]]'s [[Lamborghini Gallardo GT3]] with countryman Marius Ritskes, with three second places as his best results. Continuing in 2009 under the Racing Team Holland banner (not to be confused with Racing for Holland), the duo fails to score any more points. A one-off at Spa in the team's GT4 [[Ford Mustang FR500|Ford Mustang FR500C]] fails to materialise.

Another single GT4 appearance takes place in 2016 with a [[Ginetta G55 GT4]] drive in the Paul Ricard 24 Hours for Team Africa Le Mans. His final two GT races come at his farewell weekend at [[2019 Le Mans Cup|Le Mans in 2019]], sharing a [[Bentley Continental GT|Bentley Continental GT3]] with Greg Mills for the same Team Africa Le Mans.<ref>{{Cite web |title=Jan Lammers |url=https://www.racingsportscars.com/driver/Jan-Lammers-NL.html |website=RacingSportscars.com}}</ref>

== Other championships ==

=== IndyCar ===
In [[1985 CART PPG Indy Car World Series|1985]], Lammers grabs the opportunity to make his [[IndyCar Series|IndyCar]] debut, taking a drive with the small AMI Racing team. His strong performance in their [[March 85C|March-Cosworth 85C]] allows him to be snapped up by the [[Forsythe Green Racing|Forsythe-Green team]], racing their [[Lola T800|Lola-Cosworth T800]] and [[Lola T900|T900]] in the final three races of the season, The Dutchman immediately scores points for them with fifth at [[WeatherTech Raceway Laguna Seca|Laguna Seca]]. At Miami, Lammers challenges [[Danny Sullivan]] for victory before making a mistake towards the end. This leads to [[Dan Gurney]]'s [[All American Racers|All-American Racers]] signing Lammers as their lead driver for the 1986 season, but that year's Eagle GC86 proves uncompetitive and Gurney withdraws the team ahead of the Indianapolis 500. Taking over the [[Machinists Union Racing|Machinists Union]] GC86 for three races later in the season leads to an eighth at Laguna Seca and ninth at Miami.<ref name="De Roos"/>

=== F3000 ===
1986 is a season that proves Lammers' ultimate versatility, as he races in IndyCars, the WSC and Formula 3 while also taking up on an offer from [[Eddie Jordan Racing]] to replace [[Russell Spence]] in the team's March-Cosworth 86B. His single appearance at the Le Mans-Bugatti circuit results in an 11th-place finish.

In 1991, while waiting for Toyota's new sportscar programme to come on song, Lammers is in Japan to help [[Dome (constructor)|Dome]] with the development of the Mugen-engined F102, their new F3000 car. Rewarded with a one-off race outing at Suzuka, he takes third in his single appearance in the [[1991 Japanese Formula 3000 Championship|All-Nippon F3000 Championship]].

More F3000 follows in [[1993 Formula 3000 season|1993]] after his Formula One deal with March fails to materialise. Accepting an offer to join the Italian [[Il Barone Rampante]] team to follow in the footsteps of [[Rubens Barrichello]], Lammers takes fourth at Enna as his best result before the team is forced to close shop before the end of the season.

Two years later, Lammers is back in F3000 as he joins the Vortex team owned by Dutch transport magnate Henny Vollenberg. He wins the F3000 South African GP at Kyalami, beating [[Kenny Bräck]] and teammate [[Tarso Marques]], and does three more European rounds before quitting the team when key staff decide to leave.<ref name="De Roos"/>

=== Macau GP ===
Making a surprise return to [[Formula Three|Formula 3]], Lammers joins the [[1985 Macau Grand Prix|Macau GP grid in 1985]], racing a Ralt-Volkswagen RT30 for [[Intersport Racing]]. He embarrasses many of the regulars by qualifying and finishing third. In [[1986 Macau Grand Prix|1986]], he repeats the trick with Murray Taylor Racing's similar Ralt, again finishing third. Returning to Intersport in [[1987 Macau Grand Prix|1987]], Lammers goes one better to take second place in their Ralt-Toyota RT31, storming up from 11th on the grid, while his final Macau appearance comes in [[1988 Macau Grand Prix|1988]], again with Intersport. This time, he hauls his Ralt-Toyota RT32 up to sixth from 17th on the grid.<ref name="De Roos"/>
[[File:Jan Lammers - Volvo 850 Estate turns into Clark Curve at the BTCC races, Brands Hatch April 17 1994 (32709295845).jpg|alt=Lammers turning the Volvo 850 Estate into Clark Curve at Brands Hatch.|thumb|Lammers turning the Volvo 850 Estate into Clark Curve at Brands Hatch]]

=== BTCC ===
After his less successful 1993 season, Lammers makes a surprise move to join the touring car trail during the [[British Touring Car Championship|BTCC]]'s burgeoning [[Super Touring]] era. Teaming with his old friends from [[Tom Walkinshaw Racing|TWR]], he becomes teammate to [[Rickard Rydell]] in a pair of [[Volvo 850 Estate|Volvo 850 SE]] cars. With its estate shape, the 850 SE is a crowd puller but it lacks ultimate pace and Lammers finishes no higher than fifth.<ref name="De Roos"/>

== One-make series ==

=== BMW Procar ===
In 1980, during his time at ATS and Ensign, Lammers takes part in the second season of the [[BMW M1 Procar Championship|BMW M1 Procar Series]] that is run on Grand Prix weekends, with several Grand Prix drivers such as [[Alan Jones (racing driver)|Jones]], [[Niki Lauda|Lauda]], [[Didier Pironi|Pironi]] and [[Nelson Piquet|Piquet]] being part of the show. Lammers wins the opening race at [[Donington Park]], finishes second at [[AVUS|Avus]] and the [[Norisring]], starts from pole position at [[Monaco Grand Prix|Monaco]] and is the title favourite until [[Hans-Joachim Stuck]] drives him off the track at [[Imola Circuit|Imola]].<ref name="De Roos"/>

=== Renault 5 Turbo Cup ===
In his final [[Formula One]] season, Lammers becomes a regular in the European [[Renault 5 Turbo]] Cup, representing Renault Netherlands and taking home one win. He continues in the series in 1983 to take four wins and the championship, and repeats the trick in even more dominant fashion in 1984, lifting eight victories on his way to the title.<ref name="De Roos"/>

=== Grand Prix Masters ===
In 2005 and 2006, the [[Grand Prix Masters]] are set up as a one-make motor racing series featuring retired Formula One drivers. Lammers takes part in the sole event of 2005, finishing ninth at Kyalami, and also races in both 2006 events, taking seventh at Losail and retiring from the race at Silverstone.<ref name="driverdb.com">{{Cite web |title=Jan Lammers {{!}} Racing career profile {{!}} Driver Database |url=https://www.driverdb.com/drivers/jan-lammers/ |access-date=2022-11-22 |website=www.driverdb.com}}</ref>

=== VW Scirocco R-Cup ===
Having already retired as a full-time professional driver, Lammers guests in four races across three seasons (2010, 2011 and 2013) of the VW Scirocco R-Cup, with ninth in the 2013 Hockenheim round as his best result.<ref name="driverdb.com"/>

== Other appearances ==

=== Rallies ===
[[File:Ginaf X2222 4x4 Jan Lammers.jpg|alt=Racing for Holland's familiar chequered-flag livery returned for Lammers' Dakar adventure.|thumb|Racing for Holland's familiar chequered-flag livery returned for Lammers' Dakar adventure]]
As further proof of his versatility, Lammers adds the Dutch [[Tulip Rally|Tulpenrallye]] to his portfolio in 1979, driving for the Opel Dealer Team.<ref name="De Roos"/> Over two decades later, he is invited to join Frits van Eerd's new [[Dakar Rally]] enterprise in 2010. In the first of five Dakar outings in the Ginaf X2222 4x4 truck, Lammers fails to finish, before returning in the Ginaf works team in 2011, finishing 19th, and three more years with his own Ginaf-supported team, with 25th place in 2013 as his best result. In 2012, Lammers revives the chequered [[Racing for Holland]] livery for a sponsorship concept similar to the one he explored in the previous decade.<ref name="driverdb.com"/>

== Team principal ==
Next to his career as a professional racing driver, Lammers has acted as the team principal of his own team on three very different occasions.

=== Vitaal Racing ===
Between 1989 and 1991, Lammers runs his Opel Dealerteam Holland-supported Vitaal Racing outfit in Formula Opel Lotus. In his first year, he joins forces with Marlboro Challenge winner [[Peter Kox]], and together they win the EFDA Opel Lotus Euroseries as well as the Benelux series. In 1990, Lammers takes on another Marlboro Challenge winner, as [[Marcel Albers]] is promoted from [[Formula Ford]], resulting in sixth in the final European standings.<ref name="De Roos"/>

=== Racing for Holland ===
Setting up [[Racing for Holland]] at the start of the 21st century proves to be the birth of Lammers' final period of sportscar success at the highest level. With their [[Dome S101|Dome-Judd S101]], Racing for Holland takes two consecutive titles in the [[FIA Sportscar Championship]] in 2002 and 2003 and continues with the Dome until 2007. Lammers later revives the Racing for Holland moniker – and a similar sponsorship scheme – for three of his Dakar outings in the following decade.

=== A1GP ===
Not known as Racing for Holland as such, the team is the seatholder for the Netherlands in the [[A1 Grand Prix|A1 Grand Prix series]] that runs between 2005 and 2009. Lammers starts off with [[Jos Verstappen]] as his driver, who takes victory at Durban in the [[2005–06 A1 Grand Prix season|opening 2005–06 season]], while [[Jeroen Bleekemolen]] acts as the team's reserve driver. Bleekemolen steps up into the leading role for in [[2006–07 A1 Grand Prix season|2006–07]], winning the Beijing street race, as [[Renger van der Zande]] takes his place as a backup driver, himself taking part in three races. Bleekemolen continues in 2007–08, now supported by [[Arie Luyendyk Jr.|Arie Luyendyk Jr]]. Ditching its cheap Avon-shod [[Lola B05/52|Lola-Zytek]] chassis for pukka Michelin-tyred Ferrari cars, the A1GP organisation hurry into bankruptcy in a final [[2008–09 A1 Grand Prix season|2008–09]] season in which [[Robert Doornbos]] and [[Jeroen Bleekemolen]] take turns at the wheel, each winning a sprint race on their way to fourth for the Netherlands in the final standings.

== New responsibilities ==

=== Dutch GP ===
After his decision to go into full retirement after the 2019 season, Lammers quickly assumes another duty, as he steps in to become sporting director of the organisation founded to revive the [[Dutch Grand Prix|Dutch GP]] at [[Circuit Zandvoort|Zandvoort]]. Starting in 2020, Lammers is more than just an ambassador for the event, and after a Covid-induced postponement in 2020, the Dutch dream is finally realised in 2021, when the [[2021 Dutch Grand Prix|first Dutch GP since 1985]] is staged.<ref>{{Cite web |title=Wie is Jan Lammers? {{!}} NederlandGP |url=https://www.nederlandgp.nl/organisatie/jan-lammers/ |access-date=2022-11-22 |website=www.nederlandgp.nl}}</ref>

== Personal life ==
Lammers has two children from his marriage with Fardous Hashem.

Currently, Lammers is in a relationship since 2001 with Mariska Hoyinck. Together they have a son, René.

Lammers' youngest son [[René Lammers]] is currently competing in single seaters. The 16-year-old is a frontrunner in the [[F4 Spanish Championship|2025 F4 Spanish Championship]], having both won the [[Karting European Championship]] and finished runner-up in the [[Karting World Championship]] in the OK Category in 2023.

==Racing record==

===Complete Formula One World Championship results===
([[:Template:F1 driver results legend 2|key]])
{| class="wikitable" style="text-align:center; font-size:85%"
! Year
! Entrant
! Chassis
! Engine
! 1
! 2
! 3
! 4
! 5
! 6
! 7
! 8
! 9
! 10
! 11
! 12
! 13
! 14
! 15
! 16
! {{Tooltip|WDC|World Drivers' Championship}}
! [[List of Formula One World Championship points scoring systems|Pts]]
|-
| {{F1|1979}}
! nowrap| [[Niemeyer (tobacco)|Samson]] [[Shadow Racing Cars|Shadow Racing]]
! nowrap| [[Shadow Racing Team|Shadow]] [[Shadow DN9|DN9]]
! nowrap| [[Cosworth DFV|Ford Cosworth DFV]] 3.0 [[V8 engine|V8]]
|style="background: #EFCFFF"| [[1979 Argentine Grand Prix|ARG]]<br />{{small|Ret}}
|style="background: #CFCFFF"| [[1979 Brazilian Grand Prix|BRA]]<br />{{small|14}}
|style="background: #EFCFFF"| [[1979 South African Grand Prix|RSA]]<br />{{small|Ret}}
|style="background: #EFCFFF"| [[1979 United States Grand Prix West|USW]]<br />{{small|Ret}}
|style="background: #CFCFFF"| [[1979 Spanish Grand Prix|ESP]]<br />{{small|12}}
|style="background: #CFCFFF"| [[1979 Belgian Grand Prix|BEL]]<br />{{small|10}}
|style="background: #FFCFCF"| [[1979 Monaco Grand Prix|MON]]<br />{{small|DNQ}}
|style="background: #CFCFFF"| [[1979 French Grand Prix|FRA]]<br />{{small|18}}
|style="background: #CFCFFF"| [[1979 British Grand Prix|GBR]]<br />{{small|11}}
|style="background: #CFCFFF"| [[1979 German Grand Prix|GER]]<br />{{small|10}}
|style="background: #EFCFFF"| [[1979 Austrian Grand Prix|AUT]]<br />{{small|Ret}}
|style="background: #EFCFFF"| [[1979 Dutch Grand Prix|NED]]<br />{{small|Ret}}
|style="background: #FFCFCF"| [[1979 Italian Grand Prix|ITA]]<br />{{small|DNQ}}
|style="background: #CFCFFF"| [[1979 Canadian Grand Prix|CAN]]<br />{{small|9}}
|style="background: #FFCFCF"| [[1979 United States Grand Prix|USA]]<br />{{small|DNQ}}
|
! NC
! 0
|-
|rowspan=3| {{F1|1980}}
!rowspan=2 nowrap| [[ATS (wheels)|Team ATS]]
! nowrap| [[ATS (wheels)|ATS]] [[ATS D3|D3]]
!rowspan=2 nowrap| [[Cosworth DFV|Ford Cosworth DFV]] 3.0 [[V8 engine|V8]]
|style="background: #FFCFCF"| [[1980 Argentine Grand Prix|ARG]]<br />{{small|DNQ}}
|style="background: #FFCFCF"| [[1980 Brazilian Grand Prix|BRA]]<br />{{small|DNQ}}
|style="background: #FFCFCF"| [[1980 South African Grand Prix|RSA]]<br />{{small|DNQ}}
|colspan=13|
!rowspan=3| NC
!rowspan=3| 0
|-
! nowrap| [[ATS (wheels)|ATS]] [[ATS D4|D4]]
|colspan=3|
|style="background: #EFCFFF"| [[1980 United States Grand Prix West|USW]]<br />{{small|Ret}}
|style="background: #CFCFFF"| [[1980 Belgian Grand Prix|BEL]]<br />{{small|12}}
|style="background: #CFCFFF"| [[1980 Monaco Grand Prix|MON]]<br />{{small|NC}}
|colspan=10|
|-
! nowrap| [[Unipart]] [[Ensign (racing team)|Racing Team]]
! nowrap| [[Ensign (racing team)|Ensign]] [[Ensign N180|N180]]
! nowrap| [[Cosworth DFV|Ford Cosworth DFV]] 3.0 [[V8 engine|V8]]
|colspan=6|
|style="background: #FFCFCF"| [[1980 French Grand Prix|FRA]]<br />{{small|DNQ}}
|style="background: #FFCFCF"| [[1980 British Grand Prix|GBR]]<br />{{small|DNQ}}
|style="background: #CFCFFF"| [[1980 German Grand Prix|GER]]<br />{{small|14}}
|style="background: #FFCFCF"| [[1980 Austrian Grand Prix|AUT]]<br />{{small|DNQ}}
|style="background: #FFCFCF"| [[1980 Dutch Grand Prix|NED]]<br />{{small|DNQ}}
|style="background: #FFCFCF"| [[1980 Italian Grand Prix|ITA]]<br />{{small|DNQ}}
|style="background: #CFCFFF"| [[1980 Canadian Grand Prix|CAN]]<br />{{small|12}}
|style="background: #EFCFFF"| [[1980 United States Grand Prix|USA]]<br />{{small|Ret}}
|colspan=2|
|-
| {{F1|1981}}
! nowrap| [[ATS (wheels)|Team ATS]]
! nowrap| [[ATS (wheels)|ATS]] [[ATS D4|D4]]
! nowrap| [[Cosworth DFV|Ford Cosworth DFV]] 3.0 [[V8 engine|V8]]
|style="background: #EFCFFF"| [[1981 United States Grand Prix West|USW]]<br />{{small|Ret}}
|style="background: #FFCFCF"| [[1981 Brazilian Grand Prix|BRA]]<br />{{small|DNQ}}
|style="background: #CFCFFF"| [[1981 Argentine Grand Prix|ARG]]<br />{{small|12}}
|style="background: #FFCFCF"| [[1981 San Marino Grand Prix|SMR]]<br />{{small|DNQ}}
| [[1981 Belgian Grand Prix|BEL]]
| [[1981 Monaco Grand Prix|MON]]
| [[1981 Spanish Grand Prix|ESP]]
| [[1981 French Grand Prix|FRA]]
| [[1981 British Grand Prix|GBR]]
| [[1981 German Grand Prix|GER]]
| [[1981 Austrian Grand Prix|AUT]]
| [[1981 Dutch Grand Prix|NED]]
| [[1981 Italian Grand Prix|ITA]]
| [[1981 Canadian Grand Prix|CAN]]
| [[1981 Caesars Palace Grand Prix|CPL]]
|
! NC
! 0
|-
| {{F1|1982}}
! nowrap| [[Theodore Racing|Theodore Racing Team]]
! nowrap| [[Theodore Racing|Theodore]] [[Theodore TY02|TY02]]
! nowrap| [[Cosworth DFV|Ford Cosworth DFV]] 3.0 [[V8 engine|V8]]
| [[1982 South African Grand Prix|RSA]]
| [[1982 Brazilian Grand Prix|BRA]]
| [[1982 United States Grand Prix West|USW]]
| [[1982 San Marino Grand Prix|SMR]]
|style="background: #FFCFCF"| [[1982 Belgian Grand Prix|BEL]]<br />{{small|DNQ}}
|style="background: #FFCFCF"| [[1982 Monaco Grand Prix|MON]]<br />{{small|DNQ}}
|style="background: #FFCFCF"| [[1982 Detroit Grand Prix|DET]]<br />{{small|DNQ}}
| [[1982 Canadian Grand Prix|CAN]]
|style="background: #EFCFFF"| [[1982 Dutch Grand Prix|NED]]<br />{{small|Ret}}
|style="background: #FFCFCF"| [[1982 British Grand Prix|GBR]]<br />{{small|DNQ}}
|style="background: #FFCFCF"| [[1982 French Grand Prix|FRA]]<br />{{small|DNQ}}
| [[1982 German Grand Prix|GER]]
| [[1982 Austrian Grand Prix|AUT]]
| [[1982 Swiss Grand Prix|SUI]]
| [[1982 Italian Grand Prix|ITA]]
| [[1982 Caesars Palace Grand Prix|CPL]]
! NC
! 0
|-
| {{F1|1992}}
! nowrap| [[March Engineering|March F1]]
! nowrap| [[March Engineering|March]]  [[March CG911|CG911]]
! nowrap| [[Ilmor]] 2175A 3.5 [[V10 engine|V10]]
| [[1992 South African Grand Prix|RSA]]
| [[1992 Mexican Grand Prix|MEX]]
| [[1992 Brazilian Grand Prix|BRA]]
| [[1992 Spanish Grand Prix|ESP]]
| [[1992 San Marino Grand Prix|SMR]]
| [[1992 Monaco Grand Prix|MON]]
| [[1992 Canadian Grand Prix|CAN]]
| [[1992 French Grand Prix|FRA]]
| [[1992 British Grand Prix|GBR]]
| [[1992 German Grand Prix|GER]]
| [[1992 Hungarian Grand Prix|HUN]]
| [[1992 Belgian Grand Prix|BEL]]
| [[1992 Italian Grand Prix|ITA]]
| [[1992 Portuguese Grand Prix|POR]]
|style="background: #EFCFFF"| [[1992 Japanese Grand Prix|JPN]]<br />{{small|Ret}}
|style="background: #CFCFFF"| [[1992 Australian Grand Prix|AUS]]<br />{{small|12}}
! NC
! 0
|-
!colspan="22"|{{center|{{small|Sources:<ref name=MSportStats>{{cite web|title=Jan Lammers Results|url=https://motorsportstats.com/driver/jan-lammers/results|publisher=Motorsport Stats|access-date=12 January 2024}}</ref><ref name=MSportMagResults>{{cite web|title=Jan Lammers|url=https://www.motorsportmagazine.com/database/drivers/jan-lammers/|work=[[Motor Sport (magazine)|Motor Sport]]|access-date=12 January 2024}}</ref>}}}}
|}

===Complete World Sportscar Championship results===
([[:Template:Motorsport driver results legend|key]]) (Races in '''bold''' indicate pole position) (Races in ''italics'' indicate fastest lap)
{| class="wikitable" style="text-align:center; font-size:85%"
! Year
! Entrant
! Class
! Car
! Engine
! 1
! 2
! 3
! 4
! 5
! 6
! 7
! 8
! 9
! 10
! 11
! {{Tooltip|Pos.|Championship position}}
! Pts
|-
| [[1979 World Sportscar Championship|1979]]
! nowrap| [[Zakspeed|Zakspeed Racing]]
! Gr.5
! nowrap| [[Ford Capri|Ford Capri Turbo]]
! nowrap| [[Ford Motor Company|Ford]] 1.4 [[Inline-four engine|L4]][[Turbocharger|t]]
| [[24 Hours of Daytona|DAY]]
| [[Mugello Circuit|MUG]]
| [[Dijon-Prenois|DIJ]]
| [[Silverstone Circuit|SIL]]
|style="background: #EFCFFF"| [[Nürburgring|NÜR]]<br />{{small|Ret}}
| [[Autodromo di Pergusa|PER]]
| [[Watkins Glen International|GLN]]
| [[Brands Hatch|BRH]]
| [[Vallelunga Circuit|VAL]]
|colspan=2|
! colspan=2|<ref group="N">No drivers' Championship.</ref>
|-
| [[1983 World Sportscar Championship|1983]]
! nowrap| [[GTi Engineering]]
! C
! nowrap| [[Porsche 956]]
! nowrap| [[Porsche]] Type-935 2.6 [[Flat-6|F6]][[Turbocharger|t]]
|style="background:#DFFFDF;"| [[Autodromo Nazionale Monza|MNZ]]<br />{{small|6}}
|style="background:#FFDF9F;"| [[Silverstone Circuit|SIL]]<br />{{small|3}}
|style="background:#FFDF9F;"| [[1983 1000km of Nürburgring|NÜR]]<br />{{small|3}}
|style="background:#DFFFDF;"| [[1983 24 Hours of Le Mans|LMS]]<br />{{small|8}}
|style="background:#DFFFDF;"| [[Circuit de Spa-Francorchamps|SPA]]<br />{{small|9}}
| [[Fuji Speedway|FUJ]]
|style="background:#DFFFDF;"| [[Kyalami|KYA]]<br />{{small|5}}
|colspan=4|
! 7th
! 43
|-
|rowspan=2| [[1984 World Sportscar Championship|1984]]
!rowspan=2 nowrap| [[GTi Engineering]]
!rowspan=2| C1
! nowrap| [[Porsche 956]]
!rowspan=2 nowrap| [[Porsche]] Type-935 2.6 [[Flat-6|F6]][[Turbocharger|t]]
|style="background:#DFFFDF;"| [[1984 1000 km of Monza|MNZ]]<br />{{small|5}}
|style="background:#DFFFDF;"| [[1984 1000 km of Silverstone|SIL]]<br />{{small|5}}
|style="background: #EFCFFF"| [[1984 24 Hours of Le Mans|LMS]]<br />{{small|Ret}}
|style="background:#DFFFDF;"| [[1984 1000 km of Nürburgring|NÜR]]<br />{{small|4}}
|style="background:#FFFFBF;"| [[1984 1000 km of Brands Hatch|BRH]]<br />{{small|1}}
| [[1984 1000 km of Mosport|MOS]]
|colspan=5|
!rowspan=2| 6th
!rowspan=2| 75
|-
! nowrap| [[Porsche 956]] GTi
|colspan=6|
|style="background: #EFCFFF"| [[1984 1000 km of Spa|SPA]]<br />{{small|Ret}}
|style="background:#DFDFDF;"| [[Autodromo Enzo e Dino Ferrari|IMO]]<br />{{small|2}}
|style="background:#DFFFDF;"| [[Fuji Speedway|FUJ]]<br />{{small|9}}
| [[Kyalami|KYA]]
|style="background:#FFDF9F;"| [[1984 Sandown 1000|SAN]]<br />{{small|3}}
|-
|rowspan=2| [[1985 World Sportscar Championship season|1985]]
! nowrap| [[GTi Engineering]]
!rowspan=2| C1
! nowrap| [[Porsche 956]] GTi
! nowrap| [[Porsche]] Type-935 2.6 [[Flat-6|F6]][[Turbocharger|t]]
| [[1985 1000 km of Mugello|MUG]]
|style="background:#DFFFDF;"| [[1985 1000 km of Monza|MNZ]]<br />{{small|5}}
|style="background:#DFFFDF;"| [[1985 1000 km of Silverstone|SIL]]<br />{{small|5}}
| [[1985 24 Hours of Le Mans|LMS]]
| [[1985 1000 km of Hockenheim|HOC]]
| [[1985 1000 km of Mosport|MOS]]
| [[1985 1000 km of Spa|SPA]]
|colspan=4|
!rowspan=2| 26th
!rowspan=2| 16
|-
! nowrap| [[Tom Walkinshaw Racing|TWR]] [[Jaguar Cars|Jaguar]]
! nowrap| [[Jaguar Cars|Jaguar]] [[Jaguar XJR-6|XJR-6]]
! nowrap| [[Jaguar Cars|Jaguar]] 6.2 [[V12 engine|V12]]
|colspan=7|
|style="background: #EFCFFF"| [[1985 1000 km of Brands Hatch|BRH]]<br />{{small|Ret}}
| [[1985 1000 km of Fuji|FUJ]]
|style="background:#DFDFDF;"| [[1985 800 km of Selangor|SHA]]<br />{{small|2}}
|
|-
| [[1986 World Sportscar Championship season|1986]]
! nowrap| [[Silk Cut]] [[Jaguar Cars|Jaguar]]
! C1
! nowrap| [[Jaguar Cars|Jaguar]] [[Jaguar XJR-6|XJR-6]]
! nowrap| [[Jaguar Cars|Jaguar]] 6.5 [[V12 engine|V12]]
| [[1986 360 km of Monza|MNZ]]
| [[1986 1000 km of Silverstone|SIL]]
| [[1986 24 Hours of Le Mans|LMS]]
| [[1986 100 Miles of Norisring|NOR]]
| [[1986 1000 km of Brands Hatch|BRH]]
|style="background:#FFDF9F;"| [[1986 360 km of Jerez|JER]]<br />{{small|3}}
|style="background: #EFCFFF"| [[1986 1000 km of Nürburgring|NÜR]]<br />{{small|Ret}}
|style="background:#DFDFDF;"| [[1986 1000 km of Spa|SPA]]<br />{{small|2}}
|style="background:#CFCFFF;"| [[1986 1000 km of Fuji|FUJ]]<br />{{small|17}}
|colspan=2|
! 19th
! 27
|-
|rowspan=2| [[1987 World Sportscar Championship season|1987]]
!rowspan=2 nowrap| [[Silk Cut]] [[Jaguar Cars|Jaguar]]
!rowspan=2| C1
!rowspan=2 nowrap| [[Jaguar Cars|Jaguar]] [[Jaguar XJR-8|XJR-8]]
! nowrap| [[Jaguar Cars|Jaguar]] 7.0 [[V12 engine|V12]]
|style="background:#FFFFBF;"| [[1987 360 km of Jarama|JAR]]<br />{{small|1}}
|style="background: #EFCFFF"| [[1987 1000 km of Jerez|JER]]<br />{{small|Ret}}
|style="background:#FFFFBF;"| ''[[1987 1000 km of Monza|MNZ]]''<br />{{small|1}}
|style="background:#DFDFDF;"| [[1987 1000 km of Silverstone|SIL]]<br />{{small|2}}
|
|style="background: #EFCFFF"| [[1987 200 Miles of Norisring|NOR]]<br />{{small|Ret}}
|style="background:#FFDF9F;"| '''''[[1987 1000 km of Brands Hatch|BRH]]'''''<br />{{small|3}}
|style="background: #EFCFFF"| [[1987 1000 km of Nürburgring|NÜR]]<br />{{small|Ret}}
|style="background:#DFDFDF;"| [[1987 1000 km of Spa|SPA]]<br />{{small|2}}
|style="background:#FFFFBF;"| [[1987 1000 km of Fuji|FUJ]]<br />{{small|1}}
|
!rowspan=2 style="background:#DFDFDF;"| 2nd
!rowspan=2 style="background:#DFDFDF;"| 102
|-
! nowrap| [[Jaguar Cars|Jaguar]] 6.9 [[V12 engine|V12]]
|colspan=4|
|style="background: #EFCFFF"| [[1987 24 Hours of Le Mans|LMS]]<br />{{small|Ret}}
|colspan=6|
|-
| [[1988 World Sportscar Championship season|1988]]
! nowrap| [[Silk Cut]] [[Jaguar Cars|Jaguar]]
! C1
! nowrap| [[Jaguar Cars|Jaguar]] [[Jaguar XJR-9|XJR-9]]
! nowrap| [[Jaguar Cars|Jaguar]] 7.0 [[V12 engine|V12]]
|style="background: #EFCFFF"| [[1988 800 km of Jerez|JER]]<br />{{small|Ret}}
|style="background: #EFCFFF"| [[1988 360 km of Jarama|JAR]]<br />{{small|Ret}}
|style="background: #EFCFFF"| [[1988 1000 km of Monza|MNZ]]<br />{{small|Ret}}
|style="background: #EFCFFF"| [[1988 1000 km of Silverstone|SIL]]<br />{{small|Ret}}
|style="background:#FFFFBF;"| [[1988 24 Hours of Le Mans|LMS]]<br />{{small|1}}
|style="background:#FFDF9F;"| [[1988 360 km of Brno|BRN]]<br />{{small|3}}
|style="background: #EFCFFF"| [[1988 1000 km of Brands Hatch|BRH]]<br />{{small|Ret}}
|style="background:#DFFFDF;"| [[1988 1000 km of Nürburgring|NÜR]]<br />{{small|8}}
|style="background:#DFDFDF;"| ''[[1988 1000 km of Spa|SPA]]''<br />{{small|2}}
|style="background: #EFCFFF"| [[1988 1000 km of Fuji|FUJ]]<br />{{small|Ret}}
|style="background:#DFFFDF;"| [[1988 360 km of Sandown Park|SAN]]<br />{{small|4}}
! 10th
! 118
|-
|rowspan=2| [[1989 World Sportscar Championship season|1989]]
!rowspan=2 nowrap| [[Silk Cut]] [[Jaguar Cars|Jaguar]]
!rowspan=2| C1
! nowrap| [[Jaguar Cars|Jaguar]] [[Jaguar XJR-9|XJR-9]]
! nowrap| [[Jaguar Cars|Jaguar]] 7.0 [[V12 engine|V12]]
|style="background: #EFCFFF"| ''[[1989 480 km of Suzuka|SUZ]]''<br />{{small|Ret}}
|style="background: #EFCFFF"| [[1989 480 km of Dijon|DIJ]]<br />{{small|Ret}}
|style="background:#DFDFDF;"| [[1989 480 km of Jarama|JAR]]<br />{{small|2}}
|colspan=4|
|style="background:#DFFFDF;"| [[1989 480 km of Mexico|MEX]]<br />{{small|6}}
|colspan=3|
!rowspan=2| 8th
!rowspan=2| 30
|-
! nowrap| [[Jaguar Cars|Jaguar]] [[Jaguar XJR-11|XJR-11]]
! nowrap| [[Jaguar Cars|Jaguar]] JV6 3.5 [[V6 engine|V6]][[Turbocharger|t]]
|colspan=3|
|style="background:#DFFFDF;"| '''[[1989 480 km of Brands Hatch|BRH]]'''<br />{{small|5}}
|style="background:#DFFFDF;"| [[1989 480 km of Nürburgring|NÜR]]<br />{{small|10}}
|style="background: #EFCFFF"| [[1989 480 km of Donington|DON]]<br />{{small|Ret}}
|style="background: #EFCFFF"| [[1989 480 km of Spa|SPA]]<br />{{small|Ret}}
|colspan=4|
|-
| [[1990 World Sportscar Championship season|1990]]
! nowrap| [[Silk Cut]] [[Jaguar Cars|Jaguar]]
! C1
! nowrap| [[Jaguar Cars|Jaguar]] [[Jaguar XJR-11|XJR-11]]
! nowrap| [[Jaguar Cars|Jaguar]] JV6 3.5 [[V6 engine|V6]][[Turbocharger|t]]
|style="background: #EFCFFF"| [[1990 480 km of Suzuka|SUZ]]<br />{{small|Ret}}
|style="background:#DFFFDF;"| [[1990 480 km of Monza|MNZ]]<br />{{small|4}}
|style="background:#DFDFDF;"| [[1990 480 km of Silverstone|SIL]]<br />{{small|2}}
|style="background:#DFDFDF;"| [[1990 480 km of Spa|SPA]]<br />{{small|2}}
|style="background:#DFFFDF;"| [[1990 480 km of Dijon|DIJ]]<br />{{small|4}}
|style="background:#DFFFDF;"| [[1990 480 km of Nürburgring|NÜR]]<br />{{small|4}}
|style="background:#000; color:#fff;"| [[1990 480 km of Donington|<span style="color:white;">DON</span>]]<br />{{small|DSQ}}
|style="background:#CFCFFF;"| [[1990 480 km of Montreal|CGV]]<br />{{small|15}}
|style="background: #EFCFFF"| [[1990 480 km of Mexico City|MEX]]<br />{{small|Ret}}
|colspan=2|
! 7th
! 21
|-
| [[1992 World Sportscar Championship season|1992]]
! nowrap| [[Toyota]] Team [[TOM'S|Tom's]]
! C1
! nowrap| [[Toyota TS010]]
! nowrap| [[Toyota]] RV10 3.5 [[V10 engine|V10]]
|style="background: #EFCFFF"| [[1992 500km of Monza|MNZ]]<br />{{small|Ret}}
|style="background: #EFCFFF"| [[1992 500km of Silverstone|SIL]]<br />{{small|Ret}}
|style="background:#DFFFDF;"| ''[[1992 24 Hours of Le Mans|LMS]]''<br />{{small|5}}
|style="background: #EFCFFF"| [[1992 500km of Donington|DON]]<br />{{small|Ret}}
|style="background:#DFDFDF;"| [[1992 1000km of Suzuka|SUZ]]<br />{{small|2}}
|style="background:#FFDF9F;"| [[1992 500km of Magny-Cours|MAG]]<br />{{small|3}}
|colspan=5|
! 6th
! 35
|-
!colspan="18"|{{center|{{small|Sources:<ref name=MSportStats/><ref name=MSportMagResults/><ref name=RSCResults>{{cite web|title=Complete Archive of Jan Lammers|url=https://www.racingsportscars.com/driver/archive/Jan-Lammers-NL.html|publisher=Racing Sports Cars|pages=[https://www.racingsportscars.com/driver/archive/Jan-Lammers-NL.html?page=2 2], [https://www.racingsportscars.com/driver/archive/Jan-Lammers-NL.html?page=3 3], [https://www.racingsportscars.com/driver/archive/Jan-Lammers-NL.html?page=4 4], [https://www.racingsportscars.com/driver/archive/Jan-Lammers-NL.html?page=5 5], [https://www.racingsportscars.com/driver/archive/Jan-Lammers-NL.html?page=6 6]|access-date=12 January 2024}}</ref>}}}}
|}
;Footnotes:
{{Reflist|group=N}}

===24 Hours of Le Mans results===
{| class="wikitable" style="text-align:center; font-size:90%"
|-
! Year
! Team
! Co-Drivers
! Car
! Class
! Laps
! {{Tooltip|Pos.|Overall Position}}
! {{Tooltip|Class<br />Pos.|Class Position}}
|-
! {{24hLM|1983}}
|align="left"| {{flagicon|GBR}} [[Canon (company)|Canon]] Racing<br />{{flagicon|GBR}} [[GTi Engineering]]
|align="left"| {{flagicon|GBR}} [[Jonathan Palmer]]<br />{{flagicon|GBR}} [[Richard Lloyd (racing driver)|Richard Lloyd]]
|align="left"| [[Porsche 956]]
| C
| 339
| 8th
| 8th
|-
! {{24hLM|1984}}
|align="left"| {{flagicon|GBR}} [[GTi Engineering]]
|align="left"| {{flagicon|GBR}} [[Jonathan Palmer]]
|align="left"| [[Porsche 956]]
| C1
| 239
| DNF
| DNF
|-
! {{24hLM|1987}}
|align="left"| {{flagicon|GBR}} [[Silk Cut]] [[Jaguar Cars|Jaguar]]<br />{{flagicon|GBR}} [[Tom Walkinshaw Racing]]
|align="left"| {{flagicon|USA}} [[Eddie Cheever]]<br />{{flagicon|BRA}} [[Raul Boesel]]
|align="left"| [[Jaguar XJR-8]]LM
| C1
| 325
| 5th
| 5th
|-
! {{24hLM|1988}}
|align="left"| {{flagicon|GBR}} [[Silk Cut]] [[Jaguar Cars|Jaguar]]<br />{{flagicon|GBR}} [[Tom Walkinshaw Racing]]
|align="left"| {{flagicon|GBR}} [[John Crichton-Stuart, 7th Marquess of Bute|Johnny Dumfries]]<br />{{flagicon|GBR}} [[Andy Wallace (racing driver)|Andy Wallace]]
|align="left"| [[Jaguar XJR-9]]LM
| C1
| 394
|style="background:#FFFFBF;"| '''1st'''
|style="background:#FFFFBF;"| '''1st'''
|-
! {{24hLM|1989}}
|align="left"| {{flagicon|GBR}} [[Silk Cut]] [[Jaguar Cars|Jaguar]]<br />{{flagicon|GBR}} [[Tom Walkinshaw Racing]]
|align="left"| {{flagicon|FRA}} [[Patrick Tambay]]<br />{{flagicon|GBR}} [[Andrew Gilbert-Scott]]
|align="left"| [[Jaguar XJR-9]]LM
| C1
| 380
| 4th
| 4th
|-
! {{24hLM|1990}}
|align="left"| {{flagicon|GBR}} [[Silk Cut]] [[Jaguar Cars|Jaguar]]<br />{{flagicon|GBR}} [[Tom Walkinshaw Racing]]
|align="left"| {{flagicon|GBR}} [[Andy Wallace (racing driver)|Andy Wallace]]<br />{{flagicon|AUT}} [[Franz Konrad (racing driver)|Franz Konrad]]
|align="left"| [[Jaguar XJR-12]]
| C1
| 355
|style="background:#DFDFDF;"| '''2nd'''
|style="background:#DFDFDF;"| '''2nd'''
|-
! {{24hLM|1992}}
|align="left"| {{flagicon|JPN}} [[Toyota]] Team [[TOM'S|Tom's]]
|align="left"| {{flagicon|GBR}} [[Andy Wallace (racing driver)|Andy Wallace]]<br />{{flagicon|ITA}} [[Teo Fabi]]
|align="left"| [[Toyota TS010]]
| C1
| 331
| 8th
| 5th
|-
! {{24hLM|1993}}
|align="left"| {{flagicon|JPN}} [[Toyota]] Team [[TOM'S|Tom's]]
|align="left" nowrap| {{flagicon|GBR}} [[Geoff Lees (racing driver)|Geoff Lees]]<br />{{flagicon|ARG}} [[Juan Manuel Fangio II]]
|align="left"| [[Toyota TS010]]
| C1
| 353
| 8th
| 5th
|-
! {{24hLM|1996}}
|align="left"| {{flagicon|FRA}} [[Courage Compétition]]
|align="left"| {{flagicon|USA}} [[Mario Andretti]]<br />{{flagicon|GBR}} [[Derek Warwick]]
|align="left"| [[Courage Compétition|Courage]] C36-[[Porsche]]
| LMP1
| 315
| 13th
|style="background:#FFDF9F;"| '''3rd'''
|-
! {{24hLM|1997}}
|align="left"| {{flagicon|GBR}} GT1 [[Lotus Cars|Lotus Racing]]
|align="left"| {{flagicon|NLD}} Mike Hezemans<br />{{flagicon|DEU}} [[Alexander Grau]]
|align="left"| [[Lotus Elise GT1]]
| GT1
| 121
| DNF
| DNF
|-
! {{24hLM|1998}}
|align="left"| {{flagicon|JPN}} [[Nismo|Nissan Motorsports]]<br />{{flagicon|GBR}} [[Tom Walkinshaw Racing|TWR]]
|align="left"| {{flagicon|FRA}} [[Érik Comas]]<br />{{flagicon|ITA}} [[Andrea Montermini]]
|align="left"| [[Nissan R390 GT1]]
| GT1
| 342
| 6th
| 6th
|-
! {{24hLM|1999}}
|align="left" nowrap| {{flagicon|DEU}} [[Konrad Motorsport]]<br />{{flagicon|NLD}} Talkline [[Racing for Holland]]
|align="left"| {{flagicon|NLD}} [[Peter Kox]]<br />{{flagicon|NLD}} [[Tom Coronel]]
|align="left"| [[Lola B98/10]]-[[Ford Motor Company|Ford]]
| LMP
| 213
| DNF
| DNF
|-
! {{24hLM|2000}}
|align="left"| {{flagicon|DEU}} [[Konrad Motorsport]]<br />{{flagicon|NLD}} [[Racing for Holland]]
|align="left"| {{flagicon|NLD}} [[Tom Coronel]]<br />{{flagicon|NLD}} [[Peter Kox]]
|align="left"| [[Lola B2K/10]]-[[Ford Motor Company|Ford]]
| LMP900
| 38
| DNF
| DNF
|-
! {{24hLM|2001}}
|align="left"| {{flagicon|NLD}} [[Racing for Holland]]
|align="left"| {{flagicon|NLD}} [[Donny Crevels]]<br />{{flagicon|BEL}} Val Hillebrand
|align="left"| [[Dome (constructor)|Dome]] S101-[[Judd (engine)|Judd]]
| LMP900
| 156
| DNF
| DNF
|-
! {{24hLM|2002}}
|align="left"| {{flagicon|NLD}} [[Racing for Holland]]
|align="left"| {{flagicon|NLD}} [[Tom Coronel]]<br />{{flagicon|BEL}} Val Hillebrand
|align="left"| [[Dome (constructor)|Dome]] S101-[[Judd (engine)|Judd]]
| LMP900
| 351
| 9th
| 8th
|-
! {{24hLM|2003}}
|align="left"| {{flagicon|NLD}} [[Racing for Holland]]
|align="left"| {{flagicon|NLD}} John Bosch<br />{{flagicon|GBR}} [[Andy Wallace (racing driver)|Andy Wallace]]
|align="left"| [[Dome (constructor)|Dome]] S101-[[Judd (engine)|Judd]]
| LMP900
| 360
| 6th
| 4th
|-
! {{24hLM|2004}}
|align="left"| {{flagicon|NLD}} [[Racing for Holland]]
|align="left"| {{flagicon|USA}} [[Chris Dyson]]<br />{{flagicon|JPN}} [[Katsutomo Kaneishi]]
|align="left"| [[Dome (constructor)|Dome]] S101-[[Judd (engine)|Judd]]
| LMP1
| 341
| 7th
| 6th
|-
! {{24hLM|2005}}
|align="left"| {{flagicon|NLD}} [[Racing for Holland]]
|align="left"| {{flagicon|USA}} [[Elton Julian]]<br />{{flagicon|NLD}} John Bosch
|align="left"| [[Dome (constructor)|Dome]] S101-[[Judd (engine)|Judd]]
| LMP1
| 346
| 7th
| 5th
|-
! {{24hLM|2006}}
|align="left"| {{flagicon|NLD}} [[Racing for Holland]]
|align="left"| {{flagicon|MAS}} [[Alex Yoong]]<br />{{flagicon|SWE}} [[Stefan Johansson]]
|align="left"| [[Dome (constructor)|Dome]] S101Hb-[[Judd (engine)|Judd]]
| LMP1
| 182
| DNF
| DNF
|-
! {{24hLM|2007}}
|align="left"| {{flagicon|NLD}} [[Racing for Holland]]
|align="left"| {{flagicon|NLD}} [[Jeroen Bleekemolen]]<br />{{flagicon|NLD}} David Hart
|align="left"| [[Dome (constructor)|Dome]] S101.5-[[Judd (engine)|Judd]]
| LMP1
| 305
| 25th
| 8th
|-
! {{24hLM|2008}}
|align="left"| {{flagicon|CZE}} [[Charouz Racing System]]<br />{{flagicon|USA}} [[Muscle Milk Motorsports|Team Cytosport]]
|align="left"| {{flagicon|USA}} Greg Pickett<br />{{flagicon|DEU}} [[Klaus Graf (racing driver)|Klaus Graf]]
|align="left"| [[Lola B06/10|Lola B07/17]]-[[Judd (engine)|Judd]]
| LMP1
| 146
| DNF
| DNF
|-
! {{24hLM|2011}}
|align="left"| {{flagicon|CHE}} Hope Racing
|align="left"| {{flagicon|CHE}} [[Steve Zacchia]]<br />{{flagicon|DNK}} [[Casper Elgaard]]
|align="left" nowrap| [[Oreca 01]]-[[Volkswagen|Swiss HyTech]]
| LMP1
| 115
| DNF
| DNF
|-
! {{24hLM|2017}}
|align="left"| {{flagicon|NLD}} [[Racing Team Nederland]]
|align="left"| {{flagicon|BRA}} [[Rubens Barrichello]]<br />{{flagicon|NLD}} [[Frits van Eerd]]
|align="left"| [[Dallara P217]]-[[Gibson Technology|Gibson]]
| LMP2
| 344
| 13th
| 11th
|-
! {{24hLM|2018}}
|align="left"| {{flagicon|NLD}} [[Racing Team Nederland]]
|align="left"| {{flagicon|NLD}} [[Giedo van der Garde]]<br />{{flagicon|NLD}} [[Frits van Eerd]]
|align="left"| [[Dallara P217]]-[[Gibson Technology|Gibson]]
| LMP2
| 356
| 11th
| 7th
|-
!colspan="8"|{{center|{{small|Sources:<ref name=RSCResults/><ref>{{cite web|title=Jan Lammers|url=https://www.24h-lemans.com/en/track-record/driver/jan-lammers-666|publisher=[[Automobile Club de l'Ouest]]|access-date=12 January 2024}}</ref>}}}}
|}

===24 Hours of Daytona===
([[Template:American Open Wheel driver results legend|key]])
{| class="wikitable" style="text-align:center; font-size:90%"
!colspan=45| [[24 Hours of Daytona]] results
|-style="background:#abbbdd;"
! Year
! Class
! No
! Team
! Car
! Co-drivers
! Laps
! Pos.
! Class
|-
! [[1986 24 Hours of Daytona|1986]]
|align=center| GTP
|align=center| 68
|align="left"| {{flagicon|USA}} [[BFGoodrich|B.F. Goodrich]]
|align="left"| [[Porsche 962]]
|align="left"| {{flagicon|GBR}} [[Derek Warwick]]<br />{{flagicon|USA}} [[John Morton (racing driver)|John Morton]]
| 512
| style="background:#EFCFFF;" align=center| 12 {{sup|DNF}}
| style="background:#EFCFFF;" align=center| 5 {{sup|DNF}}
|-
!rowspan=2| [[1988 24 Hours of Daytona|1988]]
|align=center| GTP
|align=center| 61
|align="left"| {{flagicon|GBR}} [[Castrol]] [[Jaguar Cars|Jaguar Racing]]
|align="left"| [[Jaguar XJR-9|Jaguar XJR-9D]]
|align="left"| {{flagicon|USA}} [[Danny Sullivan]]<br />{{flagicon|USA}} [[Davy Jones (racing driver)|Davy Jones]]
| 512
| style="background:#EFCFFF;" align=center| 26 {{sup|DNF}}
| style="background:#EFCFFF;" align=center| 10 {{sup|DNF}}
|-
|align=center| GTP
|align=center| 60
|align="left"| {{flagicon|GBR}} [[Castrol]] [[Jaguar Cars|Jaguar Racing]]
|align="left"| [[Jaguar XJR-9|Jaguar XJR-9D]]
|align="left"| {{flagicon|GBR}} [[Martin Brundle]]<br />{{flagicon|BRA}} [[Raul Boesel]]<br />{{flagicon|DNK}} [[John Nielsen (racing driver)|John Nielsen]]
| 728
|style="background:#FBFFBF;" align=center| 1
|style="background:#FBFFBF;" align=center| 1
|-
! [[1989 24 Hours of Daytona|1989]]
|align=center| GTP
|align=center| 60
|align="left"| {{flagicon|GBR}} [[Castrol]] [[Jaguar Cars|Jaguar Racing]]
|align="left"| [[Jaguar XJR-9]]
|align="left"| {{flagicon|USA}} [[Davy Jones (racing driver)|Davy Jones]]<br />{{flagicon|BRA}} [[Raul Boesel]]
| 288
| style="background:#EFCFFF;" align=center| 43 {{sup|DNF}}
| style="background:#EFCFFF;" align=center| 15 {{sup|DNF}}
|-
! [[1990 24 Hours of Daytona|1990]]
|align=center| GTP
|align=center| 61
|align="left"| {{flagicon|GBR}} [[Castrol]] [[Jaguar Cars|Jaguar Racing]]
|align="left"| [[Jaguar XJR-12|Jaguar XJR-12D]]
|align="left"| {{flagicon|USA}} [[Davy Jones (racing driver)|Davy Jones]]<br />{{flagicon|GBR}} [[Andy Wallace (racing driver)|Andy Wallace]]
| 761
|style="background:#FBFFBF;" align=center| 1
|style="background:#FBFFBF;" align=center| 1
|-
! [[1995 24 Hours of Daytona|1995]]
|align=center| 	WSC
|align=center| 9
|align="left"| {{flagicon|USA}} Auto Toy Store Inc.
|align="left"| [[Spice Engineering|Spice SE90]]-[[Chevrolet]]
|align="left"| {{flagicon|GBR}} [[Derek Bell (racing driver)|Derek Bell]]<br />{{flagicon|GBR}} [[Andy Wallace (racing driver)|Andy Wallace]]
| 100
| style="background:#EFCFFF;" align=center| 64 {{sup|DNF}}
| style="background:#EFCFFF;" align=center| 15 {{sup|DNF}}
|-
! [[1999 24 Hours of Daytona|1999]]
|align=center| CA
|align=center| 32
|align="left"| {{flagicon|DEU}} [[Konrad Motorsport]]
|align="left"| [[Lola B98/10]]-[[Lotus Cars|Lotus]]
|align="left"| {{flagicon|AUT}} [[Franz Konrad (racing driver)|Franz Konrad]]<br />{{flagicon|ITA}} [[Vincenzo Sospiri]]
| 43
| style="background:#EFCFFF;" align=center| 71 {{sup|DNF}}
| style="background:#EFCFFF;" align=center| 21 {{sup|DNF}}
|-
! [[2000 24 Hours of Daytona|2000]]
|align=center| SR
|align=center| 31
|align="left"| {{flagicon|DEU}} [[Konrad Motorsport]]
|align="left"| [[Lola B98/10]]-[[Ford Motor Company|Ford]]
|align="left" nowrap| {{flagicon|AUT}} [[Franz Konrad (racing driver)|Franz Konrad]]<br />{{flagicon|DEU}} [[Sascha Maassen]]
| 209
| style="background:#EFCFFF;" align=center| 63 {{sup|DNF}}
| style="background:#EFCFFF;" align=center| 12 {{sup|DNF}}
|-
! [[2002 24 Hours of Daytona|2002]]
|align=center| SRP
|align=center| 2
|align="left"| {{flagicon|USA}} [[Crawford Composites|Crawford Racing]]
|align="left"| [[Crawford Composites|Crawford SSC2K]]-[[Judd (engine)|Judd]]
|align="left"| {{flagicon|GBR}} [[Johnny Mowlem]]<br />{{flagicon|USA}} [[Tony Stewart]]
| 346
| style="background:#EFCFFF;" align=center| 46 {{sup|DNF}}
| style="background:#EFCFFF;" align=center| 11 {{sup|DNF}}
|-
! [[2004 24 Hours of Daytona|2004]]
|align=center| DP
|align=center| 27
|align="left"| {{flagicon|USA}} Doran Lista Racing
|align="left"| [[Doran JE4]]-[[Lexus]]
|align="left"| {{flagicon|BEL}} [[Didier Theys]]<br />{{flagicon|BEL}} [[Marc Goossens]]<br />{{flagicon|CHE}} [[Fredy Lienhard]]
| 521
| style="background:#DFFFDF;" align=center| 4
| style="background:#DFDFDF;" align=center| 2
|-
! [[2005 24 Hours of Daytona|2005]]
|align=center| DP
|align=center| 20
|align="left" nowrap| {{flagicon|USA}} [[Howard-Boss Motorsports|CITGO - Howard - Boss Motorsports]]
|align="left" nowrap| [[Crawford Composites|Crawford DP03]]-[[Pontiac (automobile)|Pontiac]]
|align="left"| {{flagicon|GBR}} [[Andy Wallace (racing driver)|Andy Wallace]]<br />{{flagicon|USA}} [[Tony Stewart]]
| 699
| style="background:#FFDF9F;" align=center| 3
| style="background:#FFDF9F;" align=center| 3 
|-
! [[2006 24 Hours of Daytona|2006]]
|align=center| DP
|align=center| 2
|align="left"| {{flagicon|USA}} [[Howard-Boss Motorsports]]
|align="left"| [[Crawford Composites|Crawford DP03]]-[[Pontiac (automobile)|Pontiac]]
|align="left"| {{flagicon|USA}} [[Danica Patrick]]<br />{{flagicon|GBR}} [[Allan McNish]]<br />{{flagicon|USA}} [[Rusty Wallace]]
| 273
|  style="background:#efcfff; text-align:center;"|50 {{sup|DNF}}
|  style="background:#efcfff; text-align:center;"|24 {{sup|DNF}}
|-
!colspan="9"|{{center|{{small|Source:<ref name=RSCResults/>}}}}
|}

===PPG Indycar Series===
([[Template:American Open Wheel driver results legend|key]])
{| class="wikitable" style="text-align:center; font-size:85%"
! Year
! Team
! No.
! Chassis
! Engine
! 1
! 2
! 3
! 4
! 5
! 6
! 7
! 8
! 9
! 10
! 11
! 12
! 13
! 14
! 15
! 16
! 17
! {{Tooltip|Pos.|Championship position}}
! Pts
! Ref
|-
|rowspan=2| [[1985 CART PPG Indy Car World Series|1985]]
! nowrap| AMI Racing
! 43
! nowrap| [[March Engineering|March 85C]]
!rowspan=2 nowrap| [[Ford Motor Company|Ford]] [[Cosworth DFX]]
| [[Grand Prix of Long Beach|LBH]]
| [[1985 Indianapolis 500|INDY]]
| [[Milwaukee IndyFest|MIL]]
|style="background: #EFCFFF"| [[Grand Prix of Portland|POR]]<br />{{small|16}}
|style="background: #CFCFFF"| [[Meadowlands Grand Prix|MEA]]<br />{{small|12}}
|style="background: #FFFFFF"| [[Grand Prix of Cleveland|CLE]]<br />{{small|DNS}}
| [[Firestone Indy 400|MCH]]
| [[Champ Car Grand Prix of Road America|ROA]]
| [[Pocono IndyCar 400|POC]]
| [[Honda Indy 200|MOH]]
| [[Grand Prix of Montreal|SAN]]
| [[Firestone Indy 400|MCH]]
|colspan=5|
!rowspan=2 style="background:#CFCFFF;"| 26th
!rowspan=2 style="background:#CFCFFF;"| 11
!rowspan=2|<ref>{{cite web|url=https://racing-reference.info/drivdet/lammeja01/1985/R|title=Jan Lammers – 1985 CART Results|work=Racing-Reference|publisher=NASCAR Digital Media, LLC|access-date=August 17, 2023}}</ref>
|-
! nowrap| [[Forsythe Championship Racing|Forsythe Racing]]
! 33
! nowrap| [[Lola Racing Cars|Lola T900]]
|colspan=12|
|style="background: #DFFFDF"| [[Laguna Seca Raceway|LAG]]<br />{{small|5}}
|style="background: #EFCFFF"| [[XM Satellite Radio Indy 200|PHX]]<br />{{small|20}}
|style="background: #EFCFFF"| [[Tamiami Park|MIA]]<br />{{small|13}}
|colspan=2|
|-
|rowspan=2| [[1986 CART PPG Indy Car World Series|1986]]
! nowrap| [[Mike Curb|Curb-Agajanian Racing]]
! 98
!rowspan=2 nowrap| [[All American Racers|Eagle 86GC]]
!rowspan=2 nowrap| [[Ford Motor Company|Ford]] [[Cosworth DFX]]
|style="background: #CFEAFF"| [[XM Satellite Radio Indy 200|PHX]]<br />{{small|9}}
|style="background: #EFCFFF"| [[Grand Prix of Long Beach|LBH]]<br />{{small|14}}
|style="background:#FFCFCF;"| [[1986 Indianapolis 500|INDY]]<br />{{small|DNQ}}
| [[Milwaukee IndyFest|MIL]]
| [[Grand Prix of Portland|POR]]
| [[Meadowlands Grand Prix|MEA]]
| [[Grand Prix of Cleveland|CLE]]
| [[Honda Indy Toronto|TOR]]
| [[Firestone Indy 400|MCH]]
| [[Pocono IndyCar 400|POC]]
| [[Honda Indy 200|MOH]]
| [[Grand Prix of Montreal|SAN]]
| [[Firestone Indy 400|MCH]]
| [[Champ Car Grand Prix of Road America|ROA]]
|colspan=3|
!rowspan=2 style="background:#CFCFFF;"| 22nd
!rowspan=2 style="background:#CFCFFF;"| 13
!rowspan=2|<ref>{{cite web|url=https://racing-reference.info/drivdet/lammeja01/1986/R|title=Jan Lammers – 1986 CART Results|work=Racing-Reference|publisher=NASCAR Digital Media, LLC|access-date=August 17, 2023}}</ref>
|-
! nowrap| [[Machinists Union Racing]]
! 59
|colspan=14|
|style="background: #CFEAFF"| [[Laguna Seca Raceway|LAG]]<br />{{small|8}}
|style="background: #EFCFFF"| [[XM Satellite Radio Indy 200|PHX]]<br />{{small|23}}
|style="background: #CFEAFF"| [[Tamiami Park|MIA]]<br />{{small|9}}
|}

====Indianapolis 500====
{| class="wikitable" style="font-size: 90%;"
|-
! Year
! Chassis
! Engine
! Start
! Finish
! Team
|-
| [[1986 Indianapolis 500|1986]]
| nowrap| [[All American Racers|Eagle]]
| nowrap| [[Ford-Cosworth]]
|align=center colspan=2 style="background:#FFCFCF;"| DNQ
| nowrap| [[Mike Curb|Curb-Agajanian Racing]]
|-
!colspan="6"|{{center|{{small|Source:<ref name=MSportMagResults/>}}}}
|}

===Complete European Formula Two Championship results===
([[:Template:Motorsport driver results legend|key]])
{| class="wikitable" style="text-align:center; font-size:85%"
|-
! Year
! Entrant
! Chassis
! Engine
! 1
! 2
! 3
! 4
! 5
! 6
! 7
! 8
! 9
! 10
! 11
! 12
! {{Tooltip|Pos.|Championship position}}
! Pts
|-
| {{F2|1980}}
! nowrap| [[March Engineering|March Racing Ltd]]
! nowrap| [[March Engineering|March 802]]
! nowrap| [[BMW in motorsport|BMW]]
| [[Thruxton Circuit|THR]]
| [[Hockenheimring|HOC]]
| [[Eifelrennen|NÜR]]
| [[ACI Vallelunga Circuit|VAL]]
| [[Pau Grand Prix|PAU]]
| [[Silverstone Circuit|SIL]]
| [[Zolder|ZOL]]
| [[Mugello Circuit|MUG]]
|style="background:#EFCFFF;"| [[Circuit Park Zandvoort|ZAN]]<br />{{small|Ret}}
| [[Autodromo di Pergusa|PER]]
| [[Misano World Circuit|MIS]]
| [[Hockenheimring|HOC]]
! NC
! 0
|-
!colspan="18"|{{center|{{small|Source:<ref name=MSportMagResults/>}}}}
|}

===Complete International Formula 3000 results===
([[:Template:Motorsport driver results legend|key]])
{| class="wikitable" style="text-align:center; font-size:85%"
! Year
! Entrant
! Chassis
! Engine
! 1
! 2
! 3
! 4
! 5
! 6
! 7
! 8
! 9
! 10
! 11
! {{Tooltip|Pos.|Championship position}}
! Pts
|-
| [[1986 International Formula 3000 Championship|1986]]
! nowrap| [[Jordan Grand Prix|Jordan Racing]]
! nowrap| [[March Engineering|March 86B]]
! [[Cosworth]]
| [[Silverstone Circuit|SIL]]
| [[ACI Vallelunga Circuit|VAL]]
| [[Pau Grand Prix|PAU]]
| [[Circuit de Spa-Francorchamps|SPA]]
| [[Autodromo Enzo e Dino Ferrari|IMO]]
| [[Mugello Circuit|MUG]]
| [[Autodromo di Pergusa|PER]]
| [[Österreichring|ÖST]]
| [[Birmingham Superprix|BIR]]
|style="background: #CFCFFF"| [[Bugatti Circuit|BUG]]<br />{{small|11}}
| [[Circuito Permanente Del Jarama|JAR]]
! NC
! 0
|-
| [[1993 International Formula 3000 Championship|1993]]
! nowrap| [[Il Barone Rampante]]
! nowrap| [[Reynard Motorsport|Reynard 93D]]
! [[Cosworth]]
|style="background: #CFCFFF"| [[Donington Park|DON]]<br />{{small|9}}
|style="background: #CFCFFF"| [[Silverstone Circuit|SIL]]<br />{{small|9}}
|style="background: #CFCFFF"| [[Pau Grand Prix|PAU]]<br />{{small|10}}
|style="background: #DFFFDF"| [[Autodromo di Pergusa|PER]]<br />{{small|4}}
|style="background: #CFCFFF"| [[Hockenheimring|HOC]]<br />{{small|7}}
|style="background: #EFCFFF"| [[Nürburgring|NÜR]]<br />{{small|Ret}}
| [[Circuit de Spa-Francorchamps|SPA]]
| [[Circuit de Nevers Magny-Cours|MAG]]
| [[Circuit Paul Armagnac|NOG]]
|colspan=2|
! 15th
! 3
|-
| [[1995 International Formula 3000 Championship|1995]]
! nowrap| [[Reynard Motorsport|Vortex Motorsport]]
! nowrap| [[Reynard Motorsport|Reynard 95D]]
! [[Cosworth]]
|style="background: #CFCFFF"| [[Silverstone Circuit|SIL]]<br />{{small|11}}
|style="background: #CFCFFF"| [[Circuit de Catalunya|CAT]]<br />{{small|10}}
|style="background: #CFCFFF"| [[Pau Grand Prix|PAU]]<br />{{small|10}}
| [[Autodromo di Pergusa|PER]]
| [[Hockenheimring|HOC]]
| [[Circuit de Spa-Francorchamps|SPA]]
| [[Autódromo do Estoril|EST]]
| [[Circuit de Nevers Magny-Cours|MAG]]
|colspan=3|
! NC
! 0
|-
!colspan="17"|{{center|{{small|Sources:<ref name=MSportStats/><ref name=MSportMagResults/>}}}}
|}

===Complete Japanese Formula 3000 Championship results===
([[:Template:Motorsport driver results legend|key]])
{| class="wikitable" style="text-align:center; font-size:85%"
! Year
! Entrant
! Chassis
! Engine
! 1
! 2
! 3
! 4
! 5
! 6
! 7
! 8
! 9
! 10
! 11
! DC
! Pts
|-
|rowspan=2| [[1987 Japanese Formula 3000 Championship|1987]]
!rowspan=2| [[Dome (constructor)|Dome]]
!rowspan=2 nowrap| [[March Engineering|March 87B]]
! [[Cosworth]]
|style="background:#DFFFDF;"| [[Suzuka Circuit|SUZ]]<br />{{small|4}}
|style="background:#CFCFFF;"| [[Fuji Speedway|FUJ]]<br />{{small|12}}
| [[Mine Circuit|MIN]]
|style="background:#CFCFFF;"| [[Suzuka Circuit|SUZ]]<br />{{small|11}}
|style="background:#DFFFDF;"| [[Suzuka Circuit|SUZ]]<br />{{small|7}}
| [[Sportsland SUGO|SUG]]
|colspan=5|
!rowspan=2| 8th
!rowspan=2| 34
|-
! nowrap| [[Cosworth]]-[[Yamaha Motor Company|Yamaha]]
|colspan=6|
|style="background:#FFFFBF;"| [[Fuji Speedway|FUJ]]<br />{{small|1}}
| [[Suzuka Circuit|SUZ]]
|style="background:#EFCFFF;"| [[Suzuka Circuit|SUZ]]<br />{{small|Ret}}
|colspan=2|
|-
| [[1991 Japanese Formula 3000 Championship|1991]]
! nowrap| [[Team LeMans]]
! nowrap| [[Dome (constructor)|Dome F102]]
! [[Mugen Motorsports|Mugen]]
|style="background:#FFDF9F;"| [[Suzuka Circuit|SUZ]]<br />{{small|3}}
|style="background:#CFCFFF;"| [[Autopolis|AUT]]<br />{{small|9}}
|style="background:#DFFFDF;"| [[Fuji Speedway|FUJ]]<br />{{small|5}}
|style="background:#EFCFFF;"| [[Mine Circuit|MIN]]<br />{{small|Ret}}
|style="background:#CFCFFF;"| [[Suzuka Circuit|SUZ]]<br />{{small|10}}
|style="background:#EFCFFF;"| [[Sportsland SUGO|SUG]]<br />{{small|Ret}}
|style="background:#DFFFDF;"| [[Fuji Speedway|FUJ]]<br />{{small|6}}
|style="background:#EFCFFF;"| [[Suzuka Circuit|SUZ]]<br />{{small|Ret}}
|style="background:#FFFFFF;"| [[Fuji Speedway|FUJ]]<br />{{small|C}}
|style="background:#CFCFFF;"| [[Suzuka Circuit|SUZ]]<br />{{small|7}}
|style="background:#EFCFFF;"| [[Fuji Speedway|FUJ]]<br />{{small|Ret}}
! 11th
! 7
|-
!colspan="17"|{{center|{{small|Source:<ref name=MSportStats/>}}}}
|}

===Complete British Touring Car Championship results===
([[:Template:Motorsport driver results legend|key]]) (Races in '''bold''' indicate pole position) (Races in ''italics'' indicate fastest lap)
{| class="wikitable" style="text-align:center; font-size:85%"
! Year
! Team
! Car
! 1
! 2
! 3
! 4
! 5
! 6
! 7
! 8
! 9
! 10
! 11
! 12
! 13
! 14
! 15
! 16
! 17
! 18
! 19
! 20
! 21
! DC
! Pts
|-
| [[1994 British Touring Car Championship|1994]]
! nowrap| [[Tom Walkinshaw Racing|Volvo 850 Racing]]
! nowrap| [[Volvo 850|Volvo 850 SE/GLT]]
|style="background:#EFCFFF;"| [[Thruxton Circuit|THR<br />1]]<br />{{small|Ret}}
|style="background:#CFCFFF;"| [[Brands Hatch|BRH<br />1]]<br />{{small|12}}
|style="background:#CFCFFF;"| [[Brands Hatch|BRH<br />2]]<br />{{small|16}}
|style="background:#CFCFFF;"| [[Snetterton Motor Racing Circuit|SNE<br />1]]<br />{{small|11}}
|style="background:#EFCFFF;"| [[Silverstone Circuit|SIL<br />1]]<br />{{small|Ret}}
|style="background:#CFCFFF;"| [[Silverstone Circuit|SIL<br />2]]<br />{{small|16}}
|style="background:#CFCFFF;"| [[Oulton Park|OUL<br />1]]<br />{{small|13}}
|style="background:#CFCFFF;"| [[Donington Park|DON<br />1]]<br />{{small|14}}
|style="background:#CFCFFF;"| [[Donington Park|DON<br />2]]<br />{{small|15}}
|style="background:#DFFFDF;"| [[Brands Hatch|BRH<br />1]]<br />{{small|7}}
|style="background:#CFCFFF;"| [[Brands Hatch|BRH<br />2]]<br />{{small|16}}
|style="background:#CFCFFF;"| [[Silverstone Circuit|SIL<br />1]]<br />{{small|12}}
|style="background:#CFCFFF;"| [[Knockhill Racing Circuit|KNO<br />1]]<br />{{small|NC}}
|style="background:#CFCFFF;"| [[Knockhill Racing Circuit|KNO<br />2]]<br />{{small|12}}
|style="background:#DFFFDF;"| [[Oulton Park|OUL<br />1]]<br />{{small|7}}
|style="background:#DFFFDF;"| [[Brands Hatch|BRH<br />1]]<br />{{small|9}}
|style="background:#DFFFDF;"| [[Brands Hatch|BRH<br />2]]<br />{{small|5}}
|style="background:#CFCFFF;"| [[Silverstone Circuit|SIL<br />1]]<br />{{small|16}}
|style="background:#CFCFFF;"| [[Silverstone Circuit|SIL<br />2]]<br />{{small|17}}
|style="background:#CFCFFF;"| [[Donington Park|DON<br />1]]<br />{{small|13}}
|style="background:#CFCFFF;"| [[Donington Park|DON<br />2]]<br />{{small|16}}
! 15th
! 18
|-
!colspan="26"|{{center|{{small|Sources:<ref name=MSportStats/><ref>{{cite web|title=Jan Lammers race results|url=https://www.touringcars.net/database/driver.php?name=Jan+LAMMERS|work=TouringCars.net|access-date=12 January 2024}}</ref>}}}}
|}

===Complete FIA GT Championship results===
([[:Template:Motorsport driver results legend|key]])
{| class="wikitable" style="text-align:center; font-size:85%"
! Year
! Team
! Car
! Class
! 1
! 2
! 3
! 4
! 5
! 6
! 7
! 8
! 9
! 10
! 11
! {{Tooltip|Pos.|Championship position}}
! Pts
|- 
| [[1997 FIA GT Championship|1997]]
! nowrap| [[Team Lotus|GT1 Lotus Racing]]
! nowrap| [[Lotus Elise GT1]] 
! GT1
|style="background:#EFCFFF;"| [[1997 FIA GT Hockenheim 4 Hours|HOC]]<br />{{small|Ret}}
|style="background:#EFCFFF;"| [[1997 FIA GT Silverstone 4 Hours|SIL]]<br />{{small|Ret}}
| [[1997 FIA GT Helsinki 3 Hours|HEL]]
|style="background:#CFCFFF;"| [[1997 FIA GT Nurburgring 4 Hours|NÜR]]<br />{{small|11}}
|style="background:#EFCFFF;"| [[1997 FIA GT Spa 4 Hours|SPA]]<br />{{small|Ret}}
|style="background:#EFCFFF;"| [[1997 FIA GT Zeltweg 4 Hours|A1R]]<br />{{small|Ret}}
| [[1997 Suzuka 1000km|SUZ]]
|style="background:#CFCFFF;"| [[1997 FIA GT Donington 4 Hours|DON]]<br />{{small|17}}
|style="background:#CFCFFF;"| [[1997 FIA GT Mugello 4 Hours|MUG]]<br />{{small|11}}
|style="background:#CFCFFF;"| [[1997 FIA GT Sebring 3 Hours|SEB]]<br />{{small|11}}
|style="background:#CFCFFF;"| [[1997 FIA GT Laguna Seca 3 Hours|LAG]]<br />{{small|9}}
! NC
! 0
|-
|rowspan=3| [[1998 FIA GT Championship|1998]]
! nowrap| Team Hezemans
! nowrap| [[Bitter Cars|Bitter]] [[Lotus Elise GT1|GT1]]
! GT1
| [[1998 FIA GT Oschersleben 500km|OSC]]
|style="background:#EFCFFF;"| [[1998 FIA GT Silverstone 500km|SIL]]<br />{{small|Ret}}
|style="background:#FFFFFF;"| [[1998 FIA GT Hockenheim 500km|HOC]]<br />{{small|DNS}}
| [[1998 FIA GT Dijon 500km|DIJ]]
| [[1998 FIA GT Budapest 500km|HUN]]
|colspan=6|
! NC
! 0
|-
! nowrap| Roock Racing
!rowspan=2 nowrap| [[Porsche 911 GT2]]
!rowspan=2| GT2
|colspan=5|
|style="background:#CFCFFF;"| [[1998 Suzuka 1000km|SUZ]]<br />{{small|7}}
| [[1998 FIA GT Donington 500km|DON]]
| [[1998 FIA GT A1-Ring 500km|A1R]]
|colspan=3|
!rowspan=2| NC
!rowspan=2| 0
|-
! nowrap| [[Konrad Motorsport]]
|colspan=8|
|style="background:#EFCFFF;"| [[1998 FIA GT Homestead 500km|HOM]]<br />{{small|Ret}}
|style="background:#EFCFFF;"| [[1998 FIA GT Laguna Seca 500km|LAG]]<br />{{small|Ret}}
|
|-
| [[2008 FIA GT Championship|2008]]
! nowrap| IPB Spartak Racing
! nowrap| [[Lamborghini Murciélago]] R-GT
! GT1
| [[2008 FIA GT Tourist Trophy|SIL]]
| [[2008 FIA GT Monza 2 Hours|MNZ]]
| [[2008 FIA GT Adria 2 Hours|ADR]]
| [[2008 FIA GT Oschersleben 2 Hours|OSC]]
|style="background:#DFFFDF;"| [[2008 Spa 24 Hours|SPA]]<br />{{small|8}}
| [[2008 FIA GT Bucharest 2 Hours|BUC]]
| [[2008 FIA GT Bucharest 2 Hours|BUC]]
| [[2008 FIA GT Brno 2 Hours|BRN]]
| [[2008 FIA GT Nogaro 2 Hours|NOG]]
| [[2008 FIA GT Zolder 2 Hours|ZOL]]
| [[2008 FIA GT San Luis 2 Hours|SAN]]
! 31st
! 8
|-
!colspan="17"|{{center|{{small|Sources:<ref name=MSportStats/><ref name=MSportMagResults/>}}}}
|}

===Complete European Le Mans Series results===
([[:Template:Motorsport driver results legend|key]])
{| class="wikitable" style="text-align:center; font-size:85%"
! Year
! Entrant
! Class
! Chassis
! Engine
! 1
! 2
! 3
! 4
! 5
! 6
! {{Tooltip|Pos.|Championship position}}
! Pts
|-
| [[2005 Le Mans Endurance Series|2005]]
! nowrap| [[Racing for Holland]]
! LMP1
! nowrap| [[Dome (constructor)|Dome]] S101 
! nowrap| [[Judd (engine)|Judd]] GV4 4.0 [[V10 engine|V10]]
| [[2005 1000 km of Spa|SPA]]
|style="background:#DFFFDF;"| [[2005 1000 km of Monza|MNZ]]<br />{{small|7}}
|style="background: #EFCFFF"| [[2005 1000 km of Silverstone|SIL]]<br />{{small|Ret}}
|style="background:#DFFFDF;"| [[2005 1000 km of Nürburgring|NÜR]]<br />{{small|8}}
| [[2005 1000 km of Istanbul|IST]]
|
! 30th
! 3
|-
|rowspan=2| [[2006 Le Mans Series|2006]]
!rowspan=2 nowrap| [[Racing for Holland]]
!rowspan=2| LMP1
!rowspan=2 nowrap| [[Dome (constructor)|Dome]] S101Hb
! nowrap| [[Mugen Motorsports|Mugen]] MF408S 4.0 [[V8 engine|V8]]
|style="background: #EFCFFF"| [[2006 1000 km of Istanbul|IST]]<br />{{small|Ret}}
| [[2006 1000 km of Spa|SPA]]
|colspan=4|
!rowspan=2| 23rd
!rowspan=2| 6
|-
!nowrap| [[Judd (engine)|Judd]] GV5 5.0 [[V10 engine|V10]]
|colspan=2|
|style="background:#FFDF9F;"| [[2006 1000 km of Nürburgring|NÜR]]<br />{{small|3}}
| [[2006 1000 km of Donington|DON]]
| [[2006 1000 km of Jarama|JAR]]
|
|-
| [[2007 Le Mans Series|2007]]
! nowrap| [[Racing for Holland]]
! LMP1
! nowrap| [[Dome (constructor)|Dome]] S101.5
! nowrap| [[Judd (engine)|Judd]] GV5.5 S2 5.5 [[V10 engine|V10]]
|style="background:#DFFFDF;"| [[2007 1000km of Monza|MNZ]]<br />{{small|8}}
|style="background: #EFCFFF"| [[2007 1000km of Valencia|VAL]]<br />{{small|Ret}}
|style="background:#DFFFDF;"| [[2007 1000km of Nürburgring|NÜR]]<br />{{small|7}}
| [[2007 1000km of Spa|SPA]]
| [[2007 1000km of Silverstone|SIL]]
| [[2007 Mil Milhas Brasil|INT]]
! 33rd
! 3
|-
| [[2008 Le Mans Series|2008]]
! nowrap| Horag Racing
! LMP2
! nowrap| [[Porsche RS Spyder]] Evo
! nowrap| [[Porsche]] MR6 3.4 [[V8 engine|V8]]
|style="background:#DFFFDF;"| [[2008 1000 km of Catalunya|CAT]]<br />{{small|6}}
|style="background:#FFDF9F;"| [[2008 1000 km of Monza|MNZ]]<br />{{small|3}}
|style="background:#DFDFDF;"| [[2008 1000 km of Spa|SPA]]<br />{{small|2}}
|style="background:#CFCFFF;"| [[2008 1000 km of Nürburgring|NÜR]]<br />{{small|12}}
|style="background:#DFDFDF;"| [[2008 1000 km of Silverstone|SIL]]<br />{{small|2}}
|
! 5th
! 25
|-
| [[2017 European Le Mans Series|2017]]
! nowrap| [[Racing Team Nederland]]
! LMP2
! nowrap| [[Dallara P217]]
! nowrap| [[Gibson Technology|Gibson]] GK428 4.2 [[V8 engine|V8]]
|style="background:#DFFFDF;"| [[Silverstone Circuit|SIL]]<br />{{small|11}}
|style="background:#DFFFDF;"| [[Autodromo Nazionale Monza|MNZ]]<br />{{small|10}}
|style="background:#DFFFDF;"| [[Red Bull Ring|RBR]]<br />{{small|7}}
|style="background:#DFFFDF;"| [[Circuit Paul Ricard|LEC]]<br />{{small|12}}
|style="background:#DFFFDF;"| [[Circuit de Spa-Francorchamps|SPA]]<br />{{small|11}}
|style="background:#DFFFDF;"| [[Algarve International Circuit|ALG]]<br />{{small|8}}
! 17th
! 12.5
|-
!colspan="13"|{{center|{{small|Sources:<ref name=MSportStats/><ref name=MSportMagResults/>}}}}
|}

===Complete Grand Prix Masters results===
([[:Template:Motorsport driver results legend|key]]) Races in '''bold''' indicate pole position, races in ''italics'' indicate fastest lap.
{| class="wikitable" style="text-align:center; font-size:85%"
|-
! Year
! Team
! Chassis
! Engine
! 1
! 2
! 3
! 4
! 5
|-
| [[2005 Grand Prix Masters season|2005]]
! nowrap| Team LG
! nowrap| [[Delta Motorsport]] GPM
! nowrap| Nicholson McLaren 3.5 [[V8 engine|V8]]
|style="background:#cfcfff;"| [[Kyalami|RSA]]<br />{{small|9}}
|colspan=4|
|-
| [[2006 Grand Prix Masters season|2006]]
! nowrap| Team LG
! nowrap| [[Delta Motorsport]] GPM
! nowrap| Nicholson McLaren 3.5 [[V8 engine|V8]]
|style="background:#cfcfff;"| [[Losail International Circuit|QAT]]<br />{{small|7}}
|style="background:#ffffff;"| [[Monza Circuit|ITA]]<br />{{small|C}}
|style="background:#efcfff;"| [[Silverstone Circuit|GBR]]<br />{{small|Ret}}
|style="background:#ffffff;"| [[Sepang International Circuit|MAL]]<br />{{small|C}}
|style="background:#ffffff;"| [[Kyalami|RSA]]<br />{{small|C}}
|-
!colspan="9"|{{center|{{small|Source:<ref name=MSportMagResults/>}}}}
|}

===Complete FIA World Endurance Championship results===
([[:Template:Motorsport driver results legend|key]])
{| class="wikitable" style="text-align:center; font-size:85%"
! Year
! Entrant
! Class
! Chassis
! Engine
! 1
! 2
! 3
! 4
! 5
! 6
! 7
! 8
! Rank
! Points
|-
| nowrap| [[2018–19 FIA World Endurance Championship|2018–19]]
! nowrap| [[Racing Team Nederland]]
! LMP2
! nowrap| [[Dallara P217]]
! nowrap| [[Gibson Technology|Gibson]] GK428 4.2 [[V8 engine|V8]]
|style="background:#DFFFDF;"| [[2018 6 Hours of Spa-Francorchamps|SPA]]<br />{{small|7}}
|style="background:#DFFFDF;"| [[2018 24 Hours of Le Mans|LMS]]<br />{{small|5}}
| [[2018 6 Hours of Silverstone|SIL]]
| [[2018 6 Hours of Fuji|FUJ]]
| [[2018 6 Hours of Shanghai|SHA]]
| [[2019 1000 Miles of Sebring|SEB]]
| [[2019 6 Hours of Spa-Francorchamps|SPA]]
| [[2019 24 Hours of Le Mans|LMS]]
! 14th
! 21
|-
!colspan="15"|{{center|{{small|Sources:<ref name=MSportStats/><ref name=RSCResults/>}}}}
|}

== Books ==
* Klis, Hans van der (2007, 3rd ed.), ''Dwars door de Tarzanbocht: de dertien Nederlandse Formule 1-coureurs''. Amsterdam, pp.&nbsp;98–115, {{ISBN|9789046700495}}.
* Koense, Mark (2020). Jan Lammers, De biografie van een leven met 300&nbsp;km/h. Amgini Autosport Store, 2020, no ISBN.

==References==
{{Reflist}}

==External links==
* {{Commons category-inline}}
* {{Official website|http://www.janlammers.com}}
* Jan Lammers on [https://twitter.com/jan_lammers Twitter]
* Jan Lammers [https://www.sportsspeakers.nl/spreker/jan-lammers/ as a speaker]

{{s-start}}
{{s-sports}}
{{succession box|before=[[Piercarlo Ghinzani]]|title=[[FIA European Formula 3 Championship (established in 1975)|European Formula 3 Championship]]<br />Champion|years=[[1978 FIA European Formula 3 Championship|1978]]|after=[[Alain Prost]]}}
{{succession box|title=[[Eurocup Mégane Trophy|Coupe d'Europe Renault 5 Turbo]]<br />Champion|before=Joël Gouhier|after=[[Oscar Larrauri]]|years=1983-1984}}
{{succession box|title= [[List of 24 Hours of Le Mans winners|Winner of the 24 Hours of Le Mans]]|before= [[Derek Bell (auto racer)|Derek Bell]]<br />[[Hans-Joachim Stuck]]<br />[[Al Holbert]]|after= [[Jochen Mass]]<br />[[Manuel Reuter]]<br />[[Stanley Dickens]]|years= [[1988 24 Hours of Le Mans|1988]]|with=[[John Crichton-Stuart, 7th Marquess of Bute|Johnny Dumfries]] & [[Andy Wallace (racing driver)|Andy Wallace]]}}
{{succession box|title= [[FIA Sportscar Championship]]<br />Champion|before= Marco Zadra |after= None<br />(Series ended)|years= [[2002 FIA Sportscar Championship season|2002]]-[[2003 FIA Sportscar Championship season|2003]]|with=Val Hillebrand (2002) & John Bosch (2003)}}
{{s-end}}
{{Formula One drivers from the Netherlands}}
{{Forsythe Championship Racing}}
{{All American Racers}}
{{Machinists Union Racing}}
{{24 Hours of Le Mans winners}}
{{24 Hours of Daytona winners}}
{{Authority control}}

{{DEFAULTSORT:Lammers, Jan}}
[[Category:1956 births]]
[[Category:Living people]]
[[Category:Sportspeople from Zandvoort]]
[[Category:Dutch racing drivers]]
[[Category:Dutch Formula One drivers]]
[[Category:Shadow Formula One drivers]]
[[Category:ATS Wheels Formula One drivers]]
[[Category:Ensign Formula One drivers]]
[[Category:Theodore Formula One drivers]]
[[Category:March Formula One drivers]]
[[Category:Champ Car drivers]]
[[Category:Japanese Formula 3000 Championship drivers]]
[[Category:A1 Grand Prix team owners]]
[[Category:German Formula Three Championship drivers]]
[[Category:FIA European Formula 3 Championship drivers]]
[[Category:British Touring Car Championship drivers]]
[[Category:24 Hours of Le Mans drivers]]
[[Category:24 Hours of Le Mans winning drivers]]
[[Category:Grand Prix Masters drivers]]
[[Category:International Formula 3000 drivers]]
[[Category:Dakar Rally drivers]]
[[Category:24 Hours of Daytona drivers]]
[[Category:American Le Mans Series drivers]]
[[Category:European Le Mans Series drivers]]
[[Category:World Sportscar Championship drivers]]
[[Category:ADAC GT Masters drivers]]
[[Category:24 Hours of Spa drivers]]
[[Category:FIA World Endurance Championship drivers]]
[[Category:24H Series drivers]]
[[Category:Sports car racing team owners]]
[[Category:Racing drivers from North Holland]]
[[Category:Jaguar in motorsport]]
[[Category:IMSA GT Championship drivers]]
[[Category:Japanese Sportscar Championship drivers]]
[[Category:TOM'S drivers]]
[[Category:Charouz Racing System drivers]]
[[Category:Forsythe Racing drivers]]
[[Category:Team LeMans drivers]]
[[Category:Racing Team Nederland drivers]]
[[Category:Nismo drivers]]
[[Category:Jaguar Racing drivers]]
[[Category:Morand Racing drivers]]
[[Category:Target Racing drivers]]
[[Category:Le Mans Cup drivers]]