Compare the Pontiac Firebird Formula W96 Ram Air - [2001] vs Jaguar XF 4.2 V8 Supercharged - [2009]. Find out which car is the fastest, most powerful, lightest or has the biggest engine in our top trumps style comparison page. Find out which car has the highest top speed or is the fastest accelerating, is it the Pontiac Firebird Formula W96 Ram Air or the Jaguar XF 4.2 V8 Supercharged. We'll leave it up to you to decide which is your favourite.