Visually, it's hard to get excited about the Jaguar XFR. In true British understatement, the car pretty much just gets larger air intakes and a couple small hood louvers. So why do we keep showing the spy shots? Because we get to talk about the engine.

The XFR is expected to be the debut of Jaguar's biggest engine. The company took its 4.2-liter V8 unit and expanded it to 5.0-liters, pumping out 500 hp in supercharged form. This will land the XF line in BMW M5 territory. Expect the blown cat before the end of 2009.

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