Compare the Mercedes GT R AMG Coupe 4.0 V8 Bi Turbo - [2018] vs Porsche 911 GT2 993 - [1995]. 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 Mercedes GT R AMG Coupe 4.0 V8 Bi Turbo or the Porsche 911 GT2 993. We'll leave it up to you to decide which is your favourite.