The Lamborghini V10 cylinder DOHC four valve V90 5 liter, 500 Hp, 510 Nm, is the concept solution for the high performance Gallardo. Instead of the more classical choice of a V72, an angle of 90 degrees was preferred in order to limit the height of the engine with advantages in the car layout (e.g. lower engine bonnet and better rear view) and in the lowering of the centre of gravity (i.e. better car dynamic characteristics). 

Even firing intervals (that ensure the smoothness of the engine) are guaranteed by the adoption of crankpins incorporating an 18-degree offset. A dry sump lubrication system not only achieves the correct lubrication even in extreme dynamic conditions, but also permits the centre of gravity to be lowered further. 

The torque output is optimised in the full rpm range. In order to achieve such an objective, the charge efficiency was increased at various speeds by a precise utilization of gas dynamic effects that take place in the intake and exhaust system. These effects are managed by the adoption of a variable geometry intake manifold and of a continuously variable valve timing system, both for intake and exhaust. 

While the variable geometry (which can be defined as “variable length”) guarantees the correct base gas dynamic characteristics both at low rpm (long runners) and high rpm (short runners), the variable valve timing system guarantees the most suitable valve opening and closing moments for each rpm. For instance, the intake valve closing moment is anticipated at low rpm and retarded at high rpm in order to coincide with the positive peaks of the pressure pulsations at the intake valves. 

Thus, the maximum torque of 510 Nm is reached at 4500 rpm, with 80% of this maximum already achieved at only 1500 rpm; conversely, the maximum power is obtained at a much higher speed, i.e. 7800 rpm. 

The throttle control is performed via a Drive by Wire system, with two electronic throttle bodies. The construction technology is obviously all aluminium. 

SUMMARY

- concept: V10 90°, 4V, crankpin offset 18°, integrated liners with eutectic alloy 
- capacity: 5 litre, bore 82.5 mm, stroke 92.8 mm 
- timing system: DOHC chain driven, continuously Variable inlet and exhaust Valve Timing 
- inlet system: Variable Geometry 
- exhaust system: two separated banks with two “5 in 1” exhaust manifolds 
- ignition system: individual coils directly mounted on each spark plug 
- engine electronic management: Lamborghini LIE 
- lubrication system: dry sump 
- max power 500 hp (368 Kw) at 7800 rpm 
- max torque 510 Nm at 4500 rpm