, stroke ratio: 0.91:1 – undersquare/long-stroke, 520.4 cc per cylinder; compression ratio: 12.5:1; dry sump lubrication system cylinder block & crankcase cast aluminium alloy; cylinder bore spacing; die-forged steel crankshaft with shared crankpins (creating an uneven firing interval of either 54 deg or 90 deg separation) cylinder heads & valvetrain cast aluminium alloy; four valves per cylinder, 40 valves total, low-friction roller finger cam followers with automatic hydraulic valve clearance compensation, chain driven double overhead camshafts, continuously variable valve timing system both for intake and exhaust aspiration two air filters, two hot-film air mass meters, two cast alloy throttle bodies each with electronically controlled throttle valves, cast magnesium alloy variable geometry and resonance intake manifold fuel system fully demand-controlled and returnless; fuel tank–mounted low-pressure fuel pump, Fuel Stratified Injection (FSI): two inlet camshaft double-cam driven single-piston high-pressure injection pumps maintaining pressure in the two stainless steel common rail fuel distributor rails, ten combustion chamber sited direct injection solenoid-controlled sequential fuel injectors ignition system & engine management mapped direct ignition with centrally mounted spark plugs and ten individual direct-acting single spark coils; two Bosch Motronic MED 9.1 or Lamborghini LIE electronic engine control units (ECUs) working on the 'master and slave' concept due to the high revving nature of the engine exhaust system 2-1-2 branch exhaust manifold per cylinder bank to minimise reverse pulsation of expelled exhaust gases DIN-rated motive power & torque outputs, ID, applications Audi — BUJ: at 8,000 rpm; at 6,500 rpm — Audi R8 V10 (04/09-07/15) LP550: at 8,000 rpm; at 6,500 rpm — Lamborghini Gallardo LP 550-2 LP560: at 8,000 rpm; at 6,500 rpm — Lamborghini Gallardo LP 560-4 LP570: at 8,000 rpm; at 6,500 rpm — Lamborghini Gallardo LP 570-4 Superleggera, Spyder Performante, Super Trofeo, Squadra Corse LP580: at 8,000 rpm; at 6,500 rpm — Lamborghini Huracán LP 580-2 LP610: at 8,250 rpm; at 6,500 rpm — Lamborghini Huracán LP 610-4, EVO RWD, Audi R8 V10 Plus LP640: at 8,000 rpm; , for STO and Tecnica, at 6,500 rpm — Lamborghini Huracán LP 640-4 Performante, EVO, STO, Tecnica references Twelve-cylinder petrols 6.0 WR12 48v This W12 badged W12 engine is a twelve cylinder W engine of four rows of three cylinders, formed by joining two imaginary 15° VR6 engine cylinder blocks, placed on a single crankshaft, with each cylinder 'double-bank' now at a 72° angle. This specific configuration is more appropriately described as a WR12