Lamborghini V8

Template:Infobox automobile engine The Lamborghini V8 is a ninety degree (90°) V8 petrol engine designed by Lamborghini in the 1970s for their less-expensive vehicles.<ref>Lamborghini Urraco & the V8s Urraco, Bravo, Silhouette, Athon, Jalpa. Jean-Francois Marchet, Osprey autohistory, 1983</ref> It was only the second internal combustion engine ever developed by the company, and first saw production for the 1971 Lamborghini Urraco.<ref name=CFI>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> It was designed by Giampaolo Dallara. The all-aluminium alloy engine was introduced as a 2.5-litre variant, displacing Template:Cvt, but was expanded, by increasing the piston stroke to a 3.0-litre variant for 1975 - now displacing Template:Cvt.

A 2.0-litre reduced-stroke version was also introduced in 1975 for sale in Italy, displacing Template:Cvt, because of Italian legislation which imposed punitive taxes on cars whose engines displaced more than 2.0 litres.

This V8 engine was also used in two other models, the Lamborghini Silhouette in 1976–1977 in which it kept the 3.0-litre displacement,<ref name=CFI/> and the slightly updated replacement in 1982, the Lamborghini Jalpa, which saw the engine increased in size to 3.5 litres, displacing Template:Cvt,<ref name=CFI/> for ease in meeting ever-tighter emissions requirements.

Specifications

engine configuration

90° V8 engine; wet sump lubrication system

engine displacement etc.

2.0: Template:Cvt; bore x stroke: Template:Cvt (stroke ratio: 1.46:1 - oversquare/short-stroke), Template:Cvt per cylinder

2.5: Template:Cvt; bore x stroke: Template:Cvt (stroke ratio: 1.62:1 - oversquare/short-stroke), Template:Cvt per cylinder

3.0: Template:Cvt; bore x stroke: Template:Cvt (stroke ratio: 1.58:1 - oversquare/short-stroke), Template:Cvt per cylinder

3.5: Template:Cvt; bore x stroke: Template:Cvt (stroke ratio: 1.15:1 - oversquare/short-stroke), Template:Cvt per cylinder

cylinder block and crankcase

cast aluminium alloy

cylinder heads and valvetrain

2.0/2.5: cast aluminium alloy, two valves per cylinder, 16 valves total, belt driven single overhead camshafts

3.0/3.5: cast aluminium alloy, two valves per cylinder, 16 valves total, chain driven double overhead camshafts

aspiration

Naturally aspirated

fuel system

2.0: 4 twin-barrel down-draught Weber 40 IDF 1 carburettors

2.5: 4 twin-barrel down-draught Weber 40 IDF 1 or Solex C40P117 carburettors

3.0: 4 twin-barrel down-draught Weber 40 DCNF carburetors

3.5: 4 twin-barrel down-draught Weber 42 DCNF carburetors

ignition system and engine management

2 Magnetti Marelli coils and 1 Marelli Distributor S127E

exhaust system

????

2.0 rated motive power & torque outputs and applications

Template:Cvt at 7,800 rpm; — Lamborghini Urraco

2.5 rated motive power & torque outputs and applications

Template:Cvt at 7,500 rpm; — Lamborghini Urraco

3.0 rated motive power & torque outputs and applications

Template:Cvt at 5,750 rpm

Template:Cvt at 7,500 rpm; — Lamborghini Urraco

Template:Cvt at 7,500 rpm; — Lamborghini Silhouette

Template:Cvt at 7,800 rpm; — Lamborghini Urraco

3.5 rated motive power & torque outputs and applications

Template:Cvt at 7,000 rpm; — Lamborghini Jalpa

External links

• Lamborghini.com official website