Compare the Audi A3 S3 Sportback 2.0 Turbo S-Tronic - [2016] vs Renault Megane RS 1.8 Turbo 300 Trophy EDC - [2018]. 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 S3 Sportback 2.0 Turbo S-Tronic or the Renault Megane RS 1.8 Turbo 300 Trophy EDC. We'll leave it up to you to decide which is your favourite.