2007 Audi S4 Avant

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4,163 cc 4.2 liters V 8 front engine with 84.5 mm bore, 92.8 mm stroke, 11 compression ratio, double overhead cam, variable valve timing/camshaft and five valves per cylinder

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Premium unleaded fuel 91

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Fuel economy EPA highway (mpg): 23 and EPA city (mpg): 15

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Multi-point injection fuel system

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17.4 gallon main premium unleaded fuel tank

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Power: 254 kW , 340 HP SAE @ 6,800 rpm; 302 ft lb , 409 Nm @ 3,500 rpm