Jaguar XF 5.0 (2009-) Review

The new 3.0-litre diesel is the pick of the Jaguar XF range. How can it not be? It's relatively low on emissions, it'll return 42mpg and the 271bhp version sprints from 0 to 62mph in just 6.4 seconds and then all the way up to a limited 155mph. So why bother with a thirsty V8? The new £49,900 5.0-litre is also limited to 155mph, only beats the diesel to the 62mph benchmark by only 0.6s but can't