Compare the Cadillac Eldorado Convertible 6.4L V8 3rd Gen - [1959] vs Renault Megane Energy TCe 205 GT 1.6 Turbo - [2015]. 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 Cadillac Eldorado Convertible 6.4L V8 3rd Gen or the Renault Megane Energy TCe 205 GT 1.6 Turbo. We'll leave it up to you to decide which is your favourite.