Jaguar is moving to modernize its XF engine lineup – once the exclusive territory of V8 mills – with a range including a turbo four, a supercharged six and supercharged V8s of various potencies.

Jaguar's 2011 XF, with its sleek, coupe-like shape, sport-sedan performance and stunning interior, competes very well with models such as the BMW 5-Series, Lexus GS 460 and Mercedes-Benz E-Class. It ...