2007 Jaguar XK-Series XK R

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One supercharger compressor

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4,196 cc 4.2 liters V 8 front engine with 86 mm bore, 90.3 mm stroke, 9.1 compression ratio, double overhead cam, variable valve timing/camshaft and four valves per cylinder AJ-V8

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Premium unleaded fuel 91

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Fuel economy EPA highway (mpg): 25 and EPA city (mpg): 17

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Multi-point injection fuel system

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18.7 gallon main premium unleaded fuel tank

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Power: 313 kW , 420 HP SAE @ 6,000 rpm; 413 ft lb , 560 Nm @ 4,000 rpm