Compare the Renault Megane Renaultsport 2.0 dCi 175 - [2007] vs Citroen CX 25 GTi Turbo - [1984]. 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 Renault Megane Renaultsport 2.0 dCi 175 or the Citroen CX 25 GTi Turbo. We'll leave it up to you to decide which is your favourite.