2010 A8 Base Sedan Vehicle Engine Performance
* 4,163 cc 4.2 liters V 8 front engine with 84.5 mm bore, 92.8 mm stroke, 12.5 compression ratio, double overhead cam, variable valve timing/camshaft and four valves per cylinder * Premium unleaded fuel 91 * Gasoline direct injection fuel system * 23.8 gallon main premium unleaded fuel tank 19.8 * Power: 261 kW , 350 HP SAE @ 6,800 rpm; 325 ft lb , 441 Nm @ 3,500 rpm.