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For 2010, the Jaguar XF gets Jaguar's all-new, 5.0-liter V-8 engine, which displaces the long-serving 4.2-liter V-8 across the Jaguar lineup. Its 385 hp and 380 lb-ft of torque represent substantial increases over the outgoing 4.2-liter engine's 300 hp and 310 lb-ft, such that this normally aspirated XF model felt nearly as fast and energetic to me as our Four Seasons 2009 XF Supercharged, which has 420 hp and 413 lb-ft. The same engine is also available in the 2010 Jaguar XK coupe and convertible.