from 5.7 litres (Diablo VT) to the final displacement of 6.5 litres in the Murciélago LP670-4 Superveloce. It took years to decide that a new engine was needed to be built from scratch, finally an all-new engine codenamed L539 having a displacement of 6.5 litres for the 2011 Aventador was developed. The new engine has a maximum power output of , is 18 kg lighter, is over-square (95mm bore, 76.4mm stroke) and has a different firing order: 1–12–4–9–2–11–6–7–3–10–5–8 instead of 1–7–4–10–2–8–6–12–3–9–5–11. Specifications First generation engine configuration — 3.5 & 3.9 60° V12 engine; wet sump lubrication system engine configuration — 6.2 & 6.5 60° V12 engine; dry sump lubrication system engine displacement etc. 3.5: , bore x stroke: (stroke ratio: 1.24:1 - 'oversquare/short-stroke engine'); per cylinder 3.9: , bore x stroke: 4.8: , bore x stroke: 85.5 mm x 69 mm (3.37 in x 2.72 in). 5.2: , bore x stroke: , compression ratio 9.5:1 and downdraft 6X2 barrel Weber carburetors. 5.7: , bore x stroke: 6.0: , bore x stroke: 6.2: , bore x stroke: (stroke ratio: 1.00:1 - 'square engine'); per cylinder; compression ratio: 10.7:1 6.5: , bore x stroke: (stroke ratio: 0.99:1 - 'square engine'); per cylinder; compression ratio: 11.2:1 cylinder block & crankcase cast aluminium alloy; pressed-in cylinder liners cylinder heads & valvetrain — 3.5, 3.9, 4.8 cast aluminium alloy; two valves per cylinder, 24 valves total, chain-driven double overhead camshaft cylinder heads & valvetrain — 6.2 & 6.5 cast aluminium alloy; 4 valves per cylinder, 48 valves total, chain-driven double overhead camshaft aspiration, fuel system & ignition system — 3.5 six twin-barrel side-draught 40 DCOE 2 Weber carburetors; one or two ignition distributors aspiration, fuel system & ignition system — 3.98 six twin-barrel down-draught carburettors; one or two ignition distributors aspiration, fuel system & ignition system — 6.2 & 6.5 two air filters, four cast alloy throttle bodies each with Magneti Marelli electronically controlled 'drive by wire' throttle butterfly valves, cast magnesium alloy intake manifold; two linked common rail fuel distributor rails, electronic sequential multi-point indirect fuel injection with intake manifold-sited fuel injectors; centrally positioned spark plugs, mapped direct ignition with 12 individual direct-acting single spark coils exhaust system — 6.2 & 6.5 two 3-branch exhaust manifolds per cylinder bank, connected to dual-inlet catalytic converters, heated oxygen sensors (lambda) monitoring pre- and post-catalyst exhaust gasses Second generation Type: 60° V12 fuel feed by Multi Point