Compare the Ford Mustang GT 5.0 V8 Convertible - [1985] vs Cadillac Eldorado Convertible 6.4L V8 3rd Gen - [1959]. 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 Ford Mustang GT 5.0 V8 Convertible or the Cadillac Eldorado Convertible 6.4L V8 3rd Gen. We'll leave it up to you to decide which is your favourite.