engine. This Volkswagen Group engine is also used with slight modification, and with the addition of two turbochargers in the Bentley Continental GT and Bentley Flying Spur. It has also been used in a form aboard the Volkswagen W12 prototype sports car to establish a 24-hour record of in 2002 at the Nardò Ring in Italy. identification parts code prefix: 07C engine displacement & engine configuration 72° W12 engine; bore x stroke: , stroke ratio: 0.93:1 – undersquare/long-stroke, 499.9 cc per cylinder, compression ratio: 10.7:1 cylinder block & crankcase homogeneous monoblock low-pressure chill die cast hypereutectic 'Alusil' aluminium-silicon alloy (AlSi17Cu4Mg); torsionally stiff aluminium alloy crankcase with high-resistance cylinder liners, simplex roller chain driven oil pump; die-forged steel 21.2 kg crankshaft, seven main bearings, crankpins offset to achieve a constant firing order as on a V6 engine cylinder heads & valvetrain cast aluminium alloy; four valves per cylinder, 48 valves total, low-friction roller finger cam followers with automatic hydraulic valve clearance compensation, double overhead camshaft driven from the flywheel side via a two-stage chain drive utilising three 3/8" simplex roller chains, continuous vane-adjustable variable valve timing for intake and exhaust camshafts with up to 52 degrees timing range for the flow-optimised inlet ports, 22 degrees on the exhaust camshafts aspiration two air filters, two hot-film air mass meters, two throttle bodies each with electronically controlled Bosch 'E-Gas' throttle valves, four-part two-channel cast magnesium alloy intake manifold; Bentley versions also use twin-turbos – one turbocharger per VR cylinder bank fuel system, ignition system, engine management two linked common rail fuel distributor rails, multi-point electronic sequential indirect fuel injection with twelve intake manifold-sited fuel injectors; centrally positioned NGK longlife spark plugs, mapped direct ignition with 12 individual direct-acting single spark coils; Bosch Motronic ME 7.1.1 electronic engine control unit (ECU), cylinder-selective knock control via four knock sensors, permanent lambda control, water-cooled alternator exhaust system two vacuum-controlled secondary air injection pumps for direct injection into exhaust ports to assist cold start operation, four exhaust manifolds with four integrated ceramic catalytic converters, eight heated oxygen sensors monitoring pre- and post catalyst exhaust gases dimensions length: , height: , width: then DIN-rated motive power & torque outputs – Audi / Volkswagen, ID codes ; — Audi A8: AZC (01/01-09/02), VW Phaeton: BAN (04/02-05/05) at 6,200 rpm, at 4,000 rpm, at 2,300–5,300 rpm — Audi A8: BHT, BSB, BTE (12/03-07/10) at 6,000 rpm; at 2,750–5,000 rpm —