>>Lamborghini V8

Lamborghini V8

Lamborghini V8

Manufacturer	Lamborghini
Production	1971-1988
Configuration	90° V8 petrol engine
Displacement	2.0: 1,995 cc (121.7 cu in), 2.5: 2,463 cc (150.3 cu in), 3.0: 2,997 cc (182.9 cu in), 3.5: 3,485 cc (212.7 cu in)
Cylinder bore	2.0: 77.4 mm (3.05 in) 2.5/3.0/3.5: 86.0 mm (3.39 in)
Piston stroke	2.0/2.5: 53.0 mm (2.09 in) 3.0: 64.5 mm (2.54 in) 3.5: 75.0 mm (2.95 in)
Cylinder block alloy	Cast aluminium alloy
Cylinder headalloy	Cast aluminium alloy
Valvetrain	2 valves per cylinder, 2.0/2.5/3.0: 2x single overhead camshaft (SOHC), 3.5: 2x double overhead camshaft (DOHC)
Fuel type	Petrol/Gasoline
Oil system	Wet sump
Cooling system	Water cooled
Power output	2.0: 136 kW (185 PS; 182 bhp) @ 7,800 rpm 2.5: 164 kW (223 PS; 220 bhp) @ 7,500 rpm, then 190 kW (258 PS; 255 bhp) 3.0: 186 kW (253 PS; 249 bhp) @ 7,500 rpm, or 194 kW (264 PS; 260 bhp) @ 7,500 rpm, or 198 kW (269 PS; 266 bhp) @ 7,800 rpm 3.5: 190 kW (258 PS; 255 bhp) @ 7,000 rpm
Specific power	2.0: 68.2 kW (92.7 PS; 91.5 bhp) per litre 3.5: 54.5 kW (74.1 PS; 73.1 bhp) per litre
Torqueoutput	3.0: 273 N·m (201 lbf·ft) @ 5,750 rpm

The Lamborghini V8 is a ninety degree (90°) V8 petrol engine designed by Lamborghini, for their less-expensive vehicles. It was only the second internal combustion engine ever developed by the company, and first saw production for the 1971 Lamborghini Urraco. It was designed by Gian Paolo Dallara. The all-aluminium alloy engine was introduced as a 2.5 litre variant, displacing 2,463 cubic centimetres (150.3 cu in), but was expanded, by increasing the piston stroke to a 3.0 litre variant for 1975 - now displacing 2,997 cubic centimetres (182.9 cu in).

A 2.0 litre reduced stroke version was also introduced in 1975 for sale in Italy, displacing 1,994 cubic centimetres (121.7 cu in), 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,and the slightly-updated replacement in 1982, the Lamborghini Jalpa which saw the engine increased in size to 3.5 litres, displacing 3,485 cubic centimetres (212.7 cu in), for ease in meeting ever-tighter emissions requirements.

Specifications

engine configuration

90° V8 engine; wet sump lubrication system

engine displacement etc.

2.0: 1,995 cubic centimetres (121.7 cu in); bore x stroke: 77.4 by 53.0 millimetres(3.05 in × 2.09 in) (stroke ratio: 1.46:1 - oversquare/short-stroke), 249.4 cc per cylinder

2.5: 2,463 cubic centimetres (150.3 cu in); bore x stroke: 86.0 by 53.0 millimetres (3.39 × 2.09 in) (stroke ratio: 1.62:1 - oversquare/short-stroke), 307.9 cc per cylinder

3.0: 2,997 cubic centimetres (182.9 cu in); bore x stroke: 86.0 by 64.5 millimetres (3.39 × 2.54 in) (stroke ratio: 1.58:1 - oversquare/short-stroke), 374.7 cc per cylinder

3.5: 3,485 cubic centimetres (212.7 cu in); bore x stroke: 86.0 by 75.0 millimetres (3.39 × 2.95 in) (stroke ratio: 1.15:1 - oversquare/short-stroke), 435.7 cc per cylinder

cylinder block and crankcase

cast aluminium alloy

cylinder heads and valvetrain

2.0/2.5/3.0: cast aluminium alloy, two valves per cylinder, 16 valves total, 2x chain driven single overhead camshafts (2xSOHC - one overhead camshaft  per cylinder bank)

3.5: cast aluminium alloy, two valves per cylinder, 16 valves total, 2x chain driven double overhead camshafts (2xDOHC - two overhead camshafts per cylinder bank - 'quad cam')

aspiration

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fuel system

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ignition system and engine management

 ????

exhaust system

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2.0 rated motive power & torque outputs and applications

136 kilowatts (185 PS; 182 bhp) @ 7,800 rpm; — Lamborghini Urraco

2.5 rated motive power & torque outputs and applications

164 kilowatts (223 PS; 220 bhp) @ 7,500 rpm; — Lamborghini Urraco

190 kilowatts (258 PS; 255 bhp) —

3.0 rated motive power & torque outputs and applications

273 newton metres (201 lbf·ft) @ 5,750 rpm

186 kilowatts (253 PS; 249 bhp) @ 7,500 rpm; — Lamborghini Urraco

194 kilowatts (264 PS; 260 bhp) @ 7,500 rpm; — Lamborghini Silhouette

198 kilowatts (269 PS; 266 bhp) @ 7,800 rpm; — Lamborghini Urraco

3.5 rated motive power & torque outputs and applications

190 kilowatts (258 PS; 255 bhp) @ 7,000 rpm; — Lamborghini Jalpa