Compare the Bentley Mulsanne 6.8 V8 Twin Turbo - [2009] vs Aston-Martin DB5 1963 - [1963]. 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 Bentley Mulsanne 6.8 V8 Twin Turbo or the Aston-Martin DB5 1963. We'll leave it up to you to decide which is your favourite.