Compare the Audi A3 2.0 TDI S-tronic Quattro Sportback - [2016] vs Renault Megane Renaultsport 2.0 dCi 175 - [2007]. 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 Audi A3 2.0 TDI S-tronic Quattro Sportback or the Renault Megane Renaultsport 2.0 dCi 175. We'll leave it up to you to decide which is your favourite.