View source for Jaguar AJ-V8 engine

{{Use dmy dates|date=January 2018}}
{{Use British English|date=January 2018}}
{{Refimprove|date=September 2009}}
{{Infobox automobile engine
| name = Jaguar AJ-V8
| image = 2001 Jaguar S-Type AJ-V8 engine.JPG
| manufacturer = {{ubl
  | 1996–2012 [[Jaguar Cars]]
  | 2013–present [[Jaguar Land Rover]]
  }}
| production = {{ubl
  | 1996–2010
  | 2005-2017 (AM05/AM14)
  | 2010–2012 (AJ133/AJ133S)
  | 2013–2024 (AJ126/AJ133S)
  }}
| configuration = {{ubl
  | 90° [[V8 engine|V8]]
  | 90° [[V6 engine|V6]]
  }}
| predecessor = {{ubl
  | [[Jaguar AJ6 engine#AJ16|Jaguar AJ16]]
  | [[Jaguar V12 engine|Jaguar V12]]
  | [[Rover V8 engine|Rover V8]]
  | [[BMW M62]]
  }}
| successor = {{ubl
  | [[Ingenium engine family|Ingenium AJ300]]
  | [[BMW N63]] (Range Rover)
  }}
| block = [[Aluminium alloy]]
| head = Aluminium alloy
| valvetrain = [[DOHC]] [[Multi-valve#Four valves|4 valves x cyl.]] with [[Variable Valve Timing|VVT]]
| fueltype = [[Petrol engine|Petrol]]
| fuelsystem = {{ubl
  | [[Multi-port fuel injection]] (1996-2010)
  | [[Gasoline direct injection|Direct injection]] (2010-present)
  }}
| coolingsystem = [[Radiator (engine cooling)|Water-cooled]]
| management = {{ubl
  | [[Denso]] (1996-2012)
  | [[Robert Bosch GmbH|Bosch]] (2013-present)
  }}
| supercharger = {{ubl
  | Eaton M112 with [[intercooler]] (1996-2010)
  | [[TVS Supercharger|TVS]] with [[intercooler]] (2010-present)
  }}
| compression = {{ubl
  | 9.5:1
  | 10.5:1
  | 11.5:1
  }}
| displacement = {{ubl
  | {{cvt|2995|cc|L|1|order=flip}} ([[V6 engine|V6]])
  | {{cvt|3473|cc|L|1|order=flip}}
  | {{cvt|3934|cc|L|1|order=flip}}
  | {{cvt|3996|cc|L|1|order=flip}}
  | {{cvt|4196|cc|L|1|order=flip}}
  | {{cvt|4280|cc|L|1|order=flip}}
  | {{cvt|4394|cc|L|1|order=flip}}
  | {{cvt|4735|cc|L|1|order=flip}}
  | {{cvt|5000|cc|L|1|order=flip}}
  }}
| bore = {{ubl
  | {{cvt|84.5|mm|in|2}} (V6)
  | {{cvt|86|mm|in|2}}
  | {{cvt|88|mm|in|2}}
  | {{cvt|89|mm|in}}
  | {{cvt|91|mm|in|2}}
  | {{cvt|92.5|mm|in|2}}
  }}
| stroke = {{ubl
  | {{cvt|86|mm|in|2}}
  | {{cvt|70|mm|in|2}}
  | {{cvt|76.5|mm|in|2}}
  | {{cvt|85|mm|in|2}}
  | {{cvt|89|mm|in}} (V6)
  | {{cvt|90.3|mm|in|2}}
  | {{cvt|91|mm|in|2}}
  | {{cvt|93|mm|in|2}}
  }}
| power = {{cvt|240–592|hp|kW PS|0}}
| torque = {{cvt|233–516|lbft|Nm|0}}
}}

The [[Jaguar Cars|Jaguar]] '''AJ-V8''' is a compact [[DOHC]] [[V8 engine|V8]] [[piston engine]] used in many Jaguar vehicles. It was the fourth new engine type in the history of the company. It was an in house design with work beginning before Ford's purchase of the company. In 1997 it replaced both designs previously available on Jaguar cars: the [[straight-6]] [[Jaguar AJ6 engine]] (or rather its AJ16 variant), and the [[Jaguar V12 engine]]. It remained the only engine type available on Jaguar until 1999 with the launch of the S-Type, when the [[Jaguar AJ-V6 engine]] was added to the list. The AJ-V8 is available in displacements ranging from 3.2L to 5.0L, and a [[supercharged]] version is also produced. [[Ford Motor Company]] also used this engine in other cars, including the [[Lincoln LS]] and the 2002–2005 [[Ford Thunderbird]], as well as in several [[Land Rover]]s, and the [[Aston Martin V8 Vantage (2005)|Aston Martin V8 Vantage]].

The AJ-V8 was designed to use [[Nikasil]]-coated cylinders rather than the more-common iron [[cylinder liner]]s. However, like the [[BMW M60]], high-sulphur fuel reacted with the Nikasil coating and caused engine failures. Jaguar replaced affected engines, and has used conventional cast-iron linings ever since.

The engine originally used a two-state [[Variable Valve Timing]] system to switch the intake cam timing by 30°. Newer variants use a more sophisticated system which can vary intake timing incrementally up to 48°. The Lincoln version was made in the United States.

Other engine features include fracture-split forged powder metal [[connecting rod]]s, a special one-piece cast camshaft, and reinforced plastic [[intake manifold]].

The AJ-V8 was on the [[Ward's 10 Best Engines]] list for 2000.

Ford ceased production of the AJ-V8 engine in September 2020 when it closed the Bridgend Plant.<ref>{{Cite news|last=Jolly|first=Jasper|url=https://www.theguardian.com/business/2019/jun/06/ford-to-close-bridgend-factory-in-september-2020|title=Ford to close Bridgend factory by September 2020|date=2019-06-06|work=The Guardian|access-date=2020-03-11|language=en-GB|issn=0261-3077}}</ref>  However, in August 2020 JLR was able to take over production means for the AJ-V8.<ref>{{Cite web|title=Jaguar Land Rover to continue AJ V8 production in-house|url=https://www.autocar.co.uk/car-news/industry/jaguar-land-rover-continue-aj-v8-production-house|access-date=2020-12-28|website=Autocar|language=en}}</ref>

==Manufacture==
The AJ8 engine was manufactured in a dedicated Jaguar facility located within the [[Ford Bridgend Engine Plant]] in [[Bridgend]], [[South Wales]]. The Jaguar "plant-within-a-plant" saved considerable investment costs by Jaguar. It was staffed by workers dedicated to Jaguar engine production and included a linked flow-line of computer numerically controlled machines with automated loading and assembly. Component supply was on a "just-in-time" basis.<ref>{{cite web|url=http://media.ford.com/news/businesssecretaryvisitsfordsexpandingengineplant.htm |title=Business Secretary Visits Ford'S Expanding Engine Plant {{pipe}} Ford Motor Company Newsroom |publisher=Media.ford.com |date=2009-01-15 |access-date=2009-10-02 |url-status=dead |archive-url=https://web.archive.org/web/20090529012525/http://media.ford.com/news/businesssecretaryvisitsfordsexpandingengineplant.htm |archive-date=2009-05-29 }}</ref><ref>{{cite web|url=http://www.whatcar.com/car-news/ford-jobs-safe-at-bridgend-and-dagenham/241920 |title=Ford jobs safe at Bridgend and Dagenham - Car and Car-Buying News - What Car? |publisher=Whatcar.com |date=2009-07-28 |access-date=2009-10-02 |url-status=dead |archive-url=https://web.archive.org/web/20091002015943/http://www.whatcar.com/car-news/ford-jobs-safe-at-bridgend-and-dagenham/241920 |archive-date=2009-10-02 }}</ref><ref>{{cite web |url=http://www.thefreelibrary.com/JAGUAR%27S+FIRST-EVER+V8+ENGINE+TO+POWER+NEW+XK8+SPORTS+CAR-a018377844 |title=Jaguar's First Ever V8 Engine To Power XK8 Sports Car |access-date=8 January 2011 |archive-date=14 December 2014 |archive-url=https://web.archive.org/web/20141214091333/http://www.thefreelibrary.com/JAGUAR%27S+FIRST-EVER+V8+ENGINE+TO+POWER+NEW+XK8+SPORTS+CAR-a018377844 |url-status=dead }}</ref><ref>{{cite web|url=http://www.atomicfrog.com/mirrors/www.blueovalnews.com/jaguar_aj_engine.htm |title=All-New, World-Class Jaguar Production Facility |url-status=dead |archive-url=https://web.archive.org/web/20110327104806/http://www.atomicfrog.com/mirrors/www.blueovalnews.com/jaguar_aj_engine.htm |archive-date=2011-03-27 }}</ref>

Jaguar Land Rover has subsequently produced the AJ supercharged petrol V8 Jaguar Land Rover engines in a state-of-the-art Engine Manufacturing Centre in Wolverhampton.<ref>{{cite web |url=https://www.sinclairjaguar.co.uk/news/new-jaguar-aj-v8/ |title=NEW JAGUAR AJ-V8 |date=13 October 2020 |access-date=21 November 2023}}</ref>

== 4.0 L {{Anchor|AJ26|AJ27}} ==

The {{cvt|3996|cc|L|1|order=flip}} '''AJ26''' engine was introduced in 1996. The number "26" comes from 12+6+8 (cylinders), because when the first ideas were sketched, a family of 6-, 8- and 12-cylinder engines was contemplated, although only the 8-cylinder version was produced. It has a square {{cvt|86|mm|in|2}} bore and stroke. It was updated in 1998 as the '''AJ27''' with continuously variable valve timing. The AJ-V8 was updated again in 2000 as the '''AJ28'''. The [[naturally aspirated]] version produces {{cvt|290|hp|kW PS|0}} <!-- EU or SAE? --> in the 2000–2002 XK8.<ref>{{Cite journal |last=Szczupak |first=D. |last2=Brunson |first2=D. |last3=Carling |first3=J. |last4=Cooke |first4=J. |last5=Joyce |first5=M. |last6=Massey |first6=N. |last7=White |first7=C. |date=1997-02-24 |title=The Jaguar AJ V8 Engine |url=https://www.jstor.org/stable/44730777 |journal=SAE Technical Paper |doi=10.4271/970914 |via=JSTOR}}</ref>

Vehicles using this engine:

* AJ26
** 1997–1998 [[Jaguar XJ (X308)|Jaguar XJ8]]
** 1997–1998 [[Jaguar XK (X100)|Jaguar XK8]]
** 1997–1998 [[Jaguar XJ (X308)|Daimler V8]]
* AJ27
** 1999–2003 [[Jaguar XJ (X308)|Jaguar XJ8]]
** 1999–2003 [[Jaguar XK (X100)|Jaguar XK8]]
** 1999–2003 [[Jaguar XJ (X308)|Daimler V8]]
* AJ28
** 2000–2002 [[Jaguar S-Type (1999)|Jaguar S-Type]] {{cvt|281|hp|kW PS|0}}, {{cvt|287|lbft|Nm|0}}

=== Supercharged {{Anchor|AJ26S|AJ27S}} ===

The supercharged version of the [[#AJ26|AJ26]] is used in the high-performance ''R'' versions of Jaguar's cars. The engine was updated with '''AJ27''' specifications for 2000. It produces {{cvt|370|hp|kW PS|0}} and {{cvt|387|lbft|Nm|0}} with the help of an Eaton supercharger (modified Roots-blower). The supercharged engine did not use variable cam timing as the normal benefits of improved volumetric efficiency are not noticeable on a boosted engine.

Vehicles using the supercharged version include:
* AJ26S
** 1998–1999 [[Jaguar XJ (X308)|Jaguar XJR]]
** 1998–1999 [[Jaguar XK (X100)|Jaguar XKR]]
** 1998–1999 [[Jaguar XJ (X308)|Daimler Super V8]]
* AJ27S
** 2000–2003 [[Jaguar XJ (X308)|Jaguar XJR]]
** 2000–2003 [[Jaguar XK (X100)|Jaguar XKR]]
** 2000–2003 [[Jaguar XJ (X308)|Daimler Super V8]]

== 3.2 L ==

The 3.2 litre variant was the second to be introduced. It reduces the stroke to {{cvt|70|mm|in|2}} and power falls to {{cvt|240|hp|kW PS|0}} and {{cvt|233|lbft|Nm|0}}. This variant was not available in the North American market. This engine did not use variable cam timing.

Vehicles using this engine:
* 1997–2003 [[Jaguar XJ (X308)|Jaguar XJ8]]

== 3.5 L ==

The {{cvt|3555|cc|L cc cuin|1|order=out}} engine, marketed as a "3.5", was only used in the XJ series. The stroke was {{cvt|76.5|mm|in|2}}. Output was {{cvt|262|bhp|kW PS|0}} at 6,250&nbsp;rpm and {{cvt|345|Nm|lbft|0}} at 4,200&nbsp;rpm.

Vehicles using this engine:
* 2002&ndash;2007 [[Jaguar XJ (X350)|Jaguar XJ8 3.5]], {{cvt|262|hp|kW PS|0}} and {{cvt|254|lbft|Nm|0}}

== 3.9 L {{Anchor|AJ30|AJ35}} ==

The {{cvt|3934|cc|L|1|order=flip}} '''AJ30/AJ35''' variant is a unique displacement used only by [[Ford Motor Company|Ford]] and [[Lincoln (automobile)|Lincoln]] and is built in Ford's [[Lima, OH]] engine plant. Bore and stroke is {{cvt|86x85|mm|in|2}}. The AJ35 version introduced for the 2003 model year added variable valve timing of the intake camshafts and electronic throttle control. While the block, crankshaft, pistons, and connecting rods are all unique to this displacement, many other parts are shared with the AJ-V8 engines produced in the UK by Jaguar.

Vehicles using this engine:
* 2000–2002 [[Lincoln LS]], {{cvt|252|hp|kW PS|0}} {{cvt|267|lbft|Nm|0}}
* 2002 [[Ford Thunderbird (eleventh generation)|Ford Thunderbird]], {{cvt|252|hp|kW PS|0}} {{cvt|267|lbft|Nm|0}}
* 2003–2006 [[Lincoln LS]], {{cvt|280|hp|kW PS|0}} {{cvt|286|lbft|Nm|0}}
* 2003–2005 [[Ford Thunderbird (eleventh generation)|Ford Thunderbird]], {{cvt|280|hp|kW PS|0}} {{cvt|286|lbft|Nm|0}}
* [[Ford Forty-Nine]] concept

The last AJ35 was produced in March 2006 after only 3 years. Total run of AJ30/35 was nearly 250,000 units

== 4.2 L {{Anchor|AJ33|AJ34}} ==

The {{cvt|4196|cc|L cc cuin|1|order=out}}, '''AJ33''' and '''AJ34''' versions retain the {{cvt|86|mm|in|2}} bore with {{cvt|90.3|mm|in|2}} stroke. It was introduced in 2002 as the '''AJ33''' and produces {{cvt|294|hp|kW PS|0}} at 6,000&nbsp;rpm with {{cvt|303|lbft|Nm|0}} of torque at 4,100&nbsp;rpm, later increased to {{cvt|300|hp|kW PS|0}} and {{cvt|310|lbft|Nm|0}}.

Vehicles using this engine:
* 2003&ndash;2006 [[Jaguar XK8|Jaguar XK-series]] {{cvt|294|hp|kW PS|0}}, {{cvt|303|lbft|Nm|0}}
* 2006&ndash;2008 [[Jaguar X150|Jaguar XK-series]] {{cvt|300|hp|kW PS|0}}, {{cvt|310|lbft|Nm|0}}
* 2002&ndash;2008 [[Jaguar S-Type (1999)|Jaguar S-Type]] 4.2, {{cvt|300|hp|kW PS|0}} and {{cvt|310|lbft|Nm|0}}
* 2004&ndash;2009 [[Jaguar XJ8]], {{cvt|300|hp|kW PS|0}} and {{cvt|310|lbft|Nm|0}}
* 2008&ndash;2010 [[Jaguar XF]], {{cvt|300|hp|kW PS|0}} and {{cvt|310|lbft|Nm|0}}

===Supercharged {{Anchor|AJ34S}}===
The '''AJ33S''' is a supercharged/[[intercooled]] variant of the '''AJ33'''.  It was introduced in 2002 to replace the 4.0 SC and produces {{cvt|390|hp|kW PS|0}} at 6,100&nbsp;rpm with {{cvt|399|lbft|Nm|0}} of torque at 3,500&nbsp;rpm. The engine was later updated to '''AJ34S''' specification to include Variable Valve Timing as well as other minor updates.
[[File:AJ-V8 4.2 XKR.jpg|thumb|252x252px|4.2-litre Supercharged V8 in a 2003 [[Jaguar XK (X100)|Jaguar XKR]] ]]
Vehicles using this engine:
* 2004–2009 [[Jaguar XJ|Jaguar XJR/Super V8]], {{cvt|400|hp|kW PS|0}} and {{cvt|408|lbft|Nm|0}}
* 2003–2006 [[Jaguar XK8|Jaguar XKR]], {{cvt|400|hp|kW PS|0}} and {{cvt|408|lbft|Nm|0}}
* 2006–2008 [[Jaguar X150|Jaguar XKR]], {{cvt|420|hp|kW PS|0}} and {{cvt|410|lbft|Nm|0}}
* 2003–2008 [[Jaguar S-Type (1999)|Jaguar S-Type]] R, {{cvt|400|hp|kW PS|0}} and {{cvt|408|lbft|Nm|0}}
* 2005–2009 [[Daimler Super Eight]]
* 2008–2010 [[Jaguar XF]], {{cvt|420|hp|kW PS|0}} and {{cvt|408|lbft|Nm|0}}

Land Rover also offered a supercharged version of the 4.2 L as that company's high-performance engine. Land Rover's version is not the same as the Jaguar's version but it was adapted from it.<ref>{{cite web|last1=Hutton|first1=Ray|title=2006 Land Rover Range Rover|url=http://www.caranddriver.com/reviews/2006-land-rover-range-rover-first-drive-review|website=caranddriver.com|date=May 2005 |publisher=Hearst Digital Media|access-date=2 October 2014}}</ref>

Applications:
* 2006–2009 [[Land Rover Range Rover Sport]] {{cvt|390|hp|kW PS|0}} and {{cvt|406|lbft|Nm|0}}
* 2006–2009 [[Land Rover Range Rover (L322)|Land Rover Range Rover]] {{cvt|400|hp|kW PS|0}} and {{cvt|413|lbft|Nm|0}}

== 4.4 L ==
[[File:2006 Land Rover Range Rover Sport engine.jpg|right|thumb|252x252px|4.4-litre V8 in a 2006 [[Range Rover Sport]]]]
The {{cvt|4394|cc|L cc cuin|1|order=out}} '''AJ41''' version features an {{cvt|88x90.3|mm|in|2}} bore and stroke. This engine replaced the [[BMW M62|BMW M62 engine]] used in 2003-2005 [[Range Rover]] models.

Applications:
* 2005–2009 [[Land Rover Discovery|Land Rover Discovery 3 / LR3]] - {{cvt|300|hp|kW PS|0}}, {{cvt|315|lbft|Nm|0}}
* 2006–2009 [[Land Rover Range Rover Sport]] - {{cvt|300|hp|kW PS|0}} at 5,500&nbsp;rpm, {{cvt|315|lbft|Nm|0}} at 4,000&nbsp;rpm
* 2006–2009 [[Land Rover Range Rover (L322)|Land Rover Range Rover]] - {{cvt|305|hp|kW PS|0}} at 5,750&nbsp;rpm, {{cvt|325|lbft|Nm|0}} at 4,000&nbsp;rpm
{{clear}}

=={{anchor|AJ37|AM14}} Aston Martin 4.3/4.7==
[[File:Aston Martin 4.7 litre V8.jpg|right|thumb|250px|4.7L V8 in a 2012 Vantage]]

[[Aston Martin]] hand-assembles a special version of the AJ-V8 for the 2005 [[Aston Martin V8 Vantage (2005)|V8 Vantage]] known as '''AM05''' – or while it was under development as '''AJ37'''.  This unit displaced {{cvt|4280|cc|L cc cuin|1|order=out}} and produces {{cvt|380|bhp|kW PS|0}} at 7,000&nbsp;rpm and {{cvt|409|Nm|lbft|0}} at 5,000&nbsp;rpm. This engine is unique to Aston Martin and features race-style [[dry-sump]] lubrication, which enables it to be mounted low to lower the centre of gravity. The firing order is the same as the other AJ-V8 engines although the cylinder numbering is different (AJ37 = 1-5-4-2-6-3-7-8 vs. AJ26 = 1-2-7-3-4-5-6-8).  The engine is assembled by hand at the AM facility in [[Cologne]], [[Germany]], which also builds the [[V12 engine|V12]] for the [[Aston Martin DB9|DB9]] and [[Aston Martin Vanquish|Vanquish]]. The cylinder block, cylinder heads, crankshaft, connecting rods, pistons, camshafts, inlet and exhaust manifolds, lubrication system and engine management are all unique to the Aston Martin version.

In May 2008, Aston Martin released a new design that used pressed cylinder liners instead of cast-in liners. This allowed for thinner liners, and a higher capacity of {{cvt|4735|cc|L cc cuin|1|order=out}} for the [[Aston Martin V8 Vantage (2005)|V8 Vantage]]. Called the '''AM14''', power output increased to {{cvt|420|bhp|kW PS|0}} (an 11% increase on the previous 4.3-litre unit) and peak torque to {{cvt|470|Nm|lbft|0}} (a 15% increase). The Aston Martin V8 Vantage S features the same 4.7-litre V8 engine found in the base Vantage, but with improved intake airflow, new mufflers, and new programming that keeps the exhaust system's bypass valves open longer. The engine in the V8 Vantage S now develops {{cvt|430|bhp|kW PS|0}} at 7,300&nbsp;rpm and torque of {{cvt|490|Nm|lbft|0}} at 5,000&nbsp;rpm representing an increase of {{cvt|10|bhp|kW PS|0}} and {{cvt|20|Nm|lbft|0}} respectively. This engine is also used in the bespoke [[Aston Martin DB10]] concept car for the 2015 [[James Bond]] film [[Spectre (2015 film)|Spectre]].

4.3, bore and stroke {{cvt|89x86|mm|in|2}}

4.7, bore and stroke {{cvt|91x91|mm|in|2}}

Applications:
* 2005–2017 [[Aston Martin Vantage (2005)|Aston Martin V8 Vantage]]
* 2014–2015 [[Aston Martin DB10]] ([[concept car]])
* 2018 [[Aston Martin V8 Cygnet]] (one-off)

==AJ-V8 Gen III 5.0==
An all new [[Gasoline direct injection|direct injection]] 5.0 L engine family was introduced in 2009, for the 2010 model year.<ref name="Gen III">{{cite web|url=http://www.jaguarperformance.com/engines/ |archive-url=https://web.archive.org/web/20090203075401/http://jaguarperformance.com/engines/ |url-status=dead |archive-date=2009-02-03 |title=Jaguar Engines |publisher=Jaguarperformance.com |access-date=2009-10-02 }}</ref> The AJ133 is a 90° V8 engine available in either supercharged or naturally aspirated form, with a bore & stroke of {{cvt|92.5x93|mm|in|2}} and a compression ratio of 9.5:1 for the supercharged version and 11.5:1 for the naturally aspirated one respectively. 

The main structural components of the engine are all manufactured from aluminium alloy. The engine is built around a very stiff, lightweight, enclosed V, deep skirt cylinder block, with an open-deck design. A structural windage tray is bolted to the bottom of the cylinder block to further improve the block stiffness, minimize NVH (noise, vibration and harshness) and help reduce oil foaming. To further enhance the stiffness of the lower engine structure, a heavily ribbed sump body is installed. The sump body also helps to reduce engine noise. 

A spheroidal graphite cast-iron crankshaft is utilized with high-strength cast pistons and fracture-split forged steel connecting rods manufactured from 36 Mn VS4 steel.<ref name="TT">{{cite web |url=http://jagrepair.com/images/Training%20Guides/NP10%20Complete%20Manual%204-15-09.pdf |archive-url=https://web.archive.org/web/20160911092243/http://jagrepair.com/images/Training%20Guides/NP10%20Complete%20Manual%204-15-09.pdf |url-status=dead |archive-date=11 September 2016 |title=AJ133 Technical Training |publisher=Jagrepair.com |access-date=2009-04-14 }}</ref>

The engine uses a [[Robert Bosch GmbH|Bosch]] high pressure direct injection fuel system with fuel pressure provided by two, cam driven high pressure pumps which are driven by a dedicated camshaft. The high pressure pumps supply the fuel rails which in turn supply the four injectors for that bank with fuel at a controlled pressure.

The four camshafts incorporate VCT ([[variable camshaft timing]]). VCT allows the timing of the intake and exhaust valves to be adjusted independently of each other.<ref>{{Cite magazine |last=Hagen |first=Dave |date=October 2014 |title=The Jaguar AJ-V8 |url=https://engineprofessional.com/articles/EPQ414_42-48.pdf |magazine=Engine Professional |pages=42-48}}</ref> 

The naturally aspirated engine features cam profile switching and variable tract length inlet manifold. 

Supercharged engines make use of a sixth-generation 1.9L TVS (Twin Vortices Series) supercharger, which is located in the 'vee' of the engine and is driven from the crankshaft by a dedicated secondary drive belt.

Denso's Generation 1.6 Engine Management System was used on earlier models, later switching to Bosch's MED17 engine management 2013+ (except for the XKR and XKR-S).

The direct fuel injection system, advanced piston and combustion chamber design and the supercharger provide improved fuel consumption and emissions, as these engines meet EU5 emission regulations in Europe and Rest of World (ROW) and ULEV 70 emission regulations in North American Specification (NAS) markets.

The naturally aspirated engine was replaced by the AJ126 supercharged V6 engine starting for the 2013 model year. It has since been replaced by the all-new [[Ingenium Engine Family|Ingenium]] turbocharged inline-6 engine.

As of December 2024, Jaguar has discontinued most of its internal combustion engine (ICE) models, including those featuring the AJ133S, as part of its transition to an all-electric lineup by 2025. The 2024 Land Rover Defender V8 is the final vehicle to use the AJ133S engine. For the 2025.5 model year, it was joined in Defender by BMW’s 4.4L [[BMW N63 | N63]] twin-turbo V8 in the Octa derivative, (NC11 had already been introduced in the 2022 Range Rover and 2023 Range Rover Sport). 

===AJ133===
Land Rover version is called 'LR-V8 Petrol engine'.

{{hidden begin
|title      = Vehicles using this engine:
|titlestyle = background:#88FF88; text-align:left;
|bodystyle  = text-align:left;
}}
{| class="wikitable"
|-
! Years !! Model !! Power output !! Torque
|-
| 2010&ndash;2015 || [[Jaguar XF]] || {{cvt|385|PS|kW hp|0}} || {{cvt|515|Nm|lbft|0}}
|-
| 2010&ndash;2015 || [[Jaguar XJ]] || {{cvt|385|PS|kW hp|0}} || {{cvt|515|Nm|lbft|0}}
|-
| 2009&ndash;2014 || [[Jaguar XK]] || {{cvt|385|PS|kW hp|0}} || {{cvt|515|Nm|lbft|0}}
|-
| 2009&ndash;2015 || [[Land Rover]] [[Land Rover Discovery|Discovery 4 / LR4]] || {{cvt|375|PS|kW hp|0}} || {{cvt|375|lbft|Nm|0}}
|-
| 2010&ndash;2015 || [[Land Rover]] [[Range Rover Sport]] || {{cvt|375|PS|kW hp|0}} || {{cvt|375|lbft|Nm|0}}
|-
| 2010&ndash;2014 || [[Land Rover]] [[Range Rover]] || {{cvt|375|PS|kW hp|0}} || {{cvt|375|lbft|Nm|0}}
|-
| 2018-2020 || [[Land_Rover_Defender#2018_Defender_Works_V8_70th_Anniversary_Edition|Land Rover Defender Works V8]] || {{cvt|405|PS|kW hp|0}} || {{cvt|380|lbft|Nm|0}}
|-
|}
{{hidden end}}

===AJ133S===
The AJ133S is the supercharged variant of the AJ133, featuring an Eaton TVS1900R supercharger. It incorporates twin water-to-air intercoolers and a front-mount heat exchanger, with a shared cooling circuit. Differences over the naturally aspirated engine include; flat-top pistons for a lower compression ratio (9.5:1 vs 11.5:1), piston-oil spray jets, and different intake camshafts without cam-profile switching capabilities. 

All AJ133S engines utilize the same supercharger pulley setup, capable of producing approximately 15PSI of boost. Differences in ECU calibrations determine the final power output.

{{hidden begin
|title      = Vehicles using this engine:
|titlestyle = background:#88FF88; text-align:left;
|bodystyle  = text-align:left;
}}
{| class="wikitable"
|-
! Years !! Model !! Power output !! Torque
|-
| 2010&ndash;2015 || [[Jaguar XF|Jaguar XF Supercharged]] || {{cvt|470|PS|kW hp|0}} || {{cvt|575|Nm|lbft|0}}
|-
| 2010&ndash;2015 || [[Jaguar XFR]] || {{cvt|510|PS|kW hp|0}} || {{cvt|625|Nm|lbft|0}}
|-
| 2013&ndash;2015 || [[Jaguar XFR-S]] || {{cvt|550|PS|kW hp|0}} || {{cvt|680|Nm|lbft|0}}
|-
| 2010&ndash;2019 || [[Jaguar XJ|Jaguar XJ Supercharged]] || {{cvt|470|PS|kW hp|0}} || {{cvt|575|Nm|lbft|0}}
|-
| 2010&ndash;2013 || [[Jaguar XJ|Jaguar XJ Supersport]] || {{cvt|510|PS|kW hp|0}} || {{cvt|625|Nm|lbft|0}}
|-
| 2014&ndash;2017 || [[Jaguar XJ|Jaguar XJR]] || {{cvt|550|PS|kW hp|0}} || {{cvt|680|Nm|lbft|0}}
|-
| 2018&ndash;2019 || [[Jaguar XJ|Jaguar XJR575]] || {{cvt|575|PS|kW hp|0}} || {{cvt|700|Nm|lbft|0}}
|-
| 2009&ndash;2015 || [[Jaguar XKR]] || {{cvt|510|PS|kW hp|0}} || {{cvt|625|Nm|lbft|0}}
|-
| 2011&ndash;2015 || [[Jaguar XKR-S]] || {{cvt|550|PS|kW hp|0}} || {{cvt|680|Nm|lbft|0}}
|-
| 2013&ndash;2014 || [[Jaguar XKR-S|Jaguar XKR-S GT]] || {{cvt|550|PS|kW hp|0}} || {{cvt|680|Nm|lbft|0}}
|-
| 2013&ndash;2015 || [[Jaguar F-Type|Jaguar F-Type V8 S]] || {{cvt|495|PS|kW hp|0}} || {{cvt|625|Nm|lbft|0}}
|-
| 2014&ndash;2020 || [[Jaguar F-Type|Jaguar F-Type R]] || {{cvt|550|PS|kW hp|0}} || {{cvt|680|Nm|lbft|0}}
|-
| 2015&ndash;2020 || [[Jaguar F-Type|Jaguar F-Type SVR]] || {{cvt|575|PS|kW hp|0}} || {{cvt|680|Nm|lbft|0}}
|-
| 2015&ndash;2016 || [[Jaguar F-Type|Jaguar F-Type Project 7]] || {{cvt|575|PS|kW hp|0}} || {{cvt|680|Nm|lbft|0}}
|-
| 2020&ndash;2024 || [[Jaguar F-Type|Jaguar F-Type P450]] || {{cvt|450|PS|kW hp|0}} || {{cvt|580|Nm|lbft|0}}
|-
| 2020&ndash;2024 || [[Jaguar F-Type|Jaguar F-Type R]] || {{cvt|575|PS|kW hp|0}} || {{cvt|680|Nm|lbft|0}}
|-
| 2018&ndash;2019 || [[Jaguar XE|Jaguar XE SV Project 8]] || {{cvt|600|PS|kW hp|0}} || {{cvt|700|Nm|lbft|0}}
|-
| 2018&ndash;2024 || [[Jaguar F-Pace|Jaguar F-Pace SVR]] || {{cvt|550|PS|kW hp|0}} || {{cvt|700|Nm|lbft|0}}
|-
| 2010&ndash;2022 || [[Land Rover]] [[Range Rover Sport|Range Rover Sport Supercharged]] || {{cvt|510|PS|kW hp|0}} || {{cvt|461|lbft|Nm|0}}
|-
| 2015&ndash;2022 || [[Land Rover]] [[Range Rover Sport|Range Rover Sport SVR]] || {{cvt|550|PS|kW hp|0}} || {{cvt|502|lbft|Nm|0}}
|-
| 2010&ndash;2021 || [[Land Rover]] [[Range Rover|Range Rover Supercharged]] || {{cvt|510|PS|kW hp|0}} || {{cvt|461|lbft|Nm|0}}
|-
| 2019&ndash;2020 || [[Land Rover]] [[Range Rover Velar|Range Rover Velar SVAutobiography]] || {{cvt|550|PS|kW hp|0}} || {{cvt|502|lbft|Nm|0}}
|-
| 2021&ndash;2024 || [[Land Rover]] [[Land Rover Defender (L663)#Defender V8|Defender V8]] P525 || {{cvt|525|PS|kW hp|0}} || {{cvt|461|lbft|Nm|0}}
|-
| 2021&ndash;2024 || [[Land Rover]] [[Land Rover Defender (L663)#Defender V8|Defender V8]] P425 || {{cvt|425|PS|kW hp|0}} || {{cvt|406|lbft|Nm|0}}
|-
|}
The [[Bowler Nemesis]] and [[David Brown Automotive#Speedback Silverstone Edition|David Brown Speedback Silverstone Edition]] also use a variant of this engine producing {{cvt|600|PS|kW hp|0}}.
{{hidden end}}

===Model year changes===
Over its production span, the AJ133/S underwent several modifications to enhance performance, reliability, and compliance with evolving emission standards. Key changes by model year include:

2010:
*Equipped with 10.5mm cylinder head bolts.
*Utilized a Tsubaki timing chain with a 6.35mm pitch (except for X351 XJ and Land Rover models, which used an 8mm pitch chain from INA).
*Featured Denso engine management.
*Employed a vacuum-actuated supercharger bypass valve.
*Supercharged variants had aluminium coolant crossover pipes.

2011:
*All AJ133 variants transitioned to an INA timing chain with an 8mm pitch for MY2012 vehicles.
*Introduced redesigned timing chain guides and tensioners.
*Switched to plastic coolant crossover pipes for supercharged models.

2013 (excluding XKR & XKR-S):
*Upgraded to 11mm cylinder head bolts.
*Adopted Bosch MED17 engine management.
*Implemented an electric supercharger bypass valve.
*Added an eco-start-stop starter motor.
*Updated air box assemblies, mass air flow (MAF) sensors, and throttle body.

2014:
*Further redesigned timing chain guides, incorporating an added steel button for MY2015 vehicles.
*Introduced new timing chain tensioners.

2021 (specific to F-Pace SVR & F-Type P450/P575):
*Removed the mechanical vacuum pump, replacing it with a blanking plate.

2024:
*Updated the coolant crossover pipes to aluminium in MY24 Defender and Jaguar F-Pace SVR vehicles. LR186859 & LR186917.

These updates aimed to address known issues and improve the engine’s overall performance and durability. For instance, the timing chain and tensioner revisions were implemented to enhance reliability. Additionally, the shift to Bosch engine management systems facilitated better integration with modern vehicle electronics and emission control systems.

==V6==
===AJ126{{Anchor|V6|AJ126|AJ-V6}}===
The AJ126 V6 uses a AJ133 V8 engine block with the rear two cylinder bores blanked, and reduced bore sizes on the remaining six cylinders.<ref>{{cite web |title=Block Party: Creating a V-6 By Declaring Two Cylinders Redundant |url=https://www.caranddriver.com/news/a15349070/block-party-creating-a-v-6-by-declaring-two-cylinders-redundant/ |website=Car and Driver|date=12 April 2016 }}</ref> While the engine block is the same size as the V8, the cylinder heads are shortened versions of the V8 heads. It is made on the same production line as the AJ133. 

The AJ126 is a {{cvt|2995|cc|L cc cuin|1|order=out}} 90° petrol V6, having a bore and stroke of {{cvt|84.5x89|mm|in|2}} with a 10.5:1 compression ratio. It is supercharged and liquid cooled featuring direct fuel injection, four overhead camshafts and four valves per cylinder. There are two versions differing in power produced, a standard version making {{cvt|340|PS|kW hp|0}} at 6,500&nbsp;rpm and {{cvt|332|lbft|Nm|0}} between 3,500-5,000&nbsp;rpm and a high-performance variant making {{cvt|380|PS|kW hp|0}} at 6,500&nbsp;rpm and {{cvt|339|lbft|Nm|0}} between 3,500-5,000&nbsp;rpm. A special [[Jaguar F-Type]] 400 Sport model made {{cvt|400|PS|kW hp|0}} and {{cvt|339|lbft|Nm|0}}.

The AJ126 engine is equipped with an Eaton TVS Roots-type supercharger. Specifically a 1.3L Eaton TVS R1320, mounted in the engine’s “vee” and is known for its compact design, efficiency, and ability to deliver smooth, immediate power.

Jaguar has since replaced the AJ-126 with an all new [[Ingenium Engine Family|Ingenium]] turbocharged inline-6 engine.

{{hidden begin
|title      = Vehicles using this engine:
|titlestyle = background:#88FF88; text-align:left;
|bodystyle  = text-align:left;
}}
{| class="wikitable"
|-
! Years !! Model !! Power output !! Torque
|-
| 2013&ndash;2024 || [[Jaguar F-Type]] V6 / V6 S / R-Dynamic || {{cvt|380|PS|kW hp|0}} || {{cvt|339|lbft|Nm|0}}
|-
| 2018 || [[Jaguar F-Type]] 400 Sport || {{cvt|400|PS|kW hp|0}} || {{cvt|339|lbft|Nm|0}}
|-
| 2013&ndash;2019 || [[Jaguar XJ (X351)|Jaguar XJ]] Portfolio || {{cvt|340|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2013&ndash;2015 || [[Jaguar XF]] Portfolio || {{cvt|340|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2016&ndash;2020 || [[Jaguar XF]] 35t || {{cvt|340|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2016&ndash;2020 || [[Jaguar XF|Jaguar XF Sportbrake]] S || {{cvt|380|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2015&ndash;2019 || [[Jaguar XE]] 35t || {{cvt|340|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2015&ndash;2019 || [[Jaguar XE]] S || {{cvt|380|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2014-2019 || [[Range Rover]] (L405) || {{cvt|340|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2014-2019 || [[Range Rover Sport]] (L494) || {{cvt|340|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2014-2016 || [[Land Rover Discovery|Land Rover Discovery 4 / LR4]] (L319) || {{cvt|340|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2017-2020 || [[Land Rover Discovery]] Si6 (L462) || {{cvt|340|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2016-2020 || [[Jaguar F-Pace]] 35t || {{cvt|340|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2016-2020 || [[Jaguar F-Pace]] S || {{cvt|380|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2018-2020 || [[Range Rover Velar]] P340 || {{cvt|340|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
| 2018-2020 || [[Range Rover Velar]] P380 || {{cvt|380|PS|kW hp|0}} || {{cvt|332|lbft|Nm|0}}
|-
|}
{{hidden end}}

==See also==
* [[Jaguar AJ6 engine]]
* [[Jaguar AJ-V6 engine]]
* [[Jaguar V12 engine]]

==References==
{{Reflist}}

{{commons category}}
{{Jaguar vehicles timeline (modern)}}

{{DEFAULTSORT:Jaguar Aj-V8 Engine}}
[[Category:Jaguar Land Rover engines|AJ-V8]]
[[Category:Aston Martin]]
[[Category:Ford engines]]
[[Category:Jaguar engines]]
[[Category:Land Rover engines]]
[[Category:Gasoline engines by model]]
[[Category:V8 engines]]