Compare the Porsche 911 SC - [1980] vs Audi A1 Quattro 2.0 Turbo - [2011]. 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 Porsche 911 SC or the Audi A1 Quattro 2.0 Turbo. We'll leave it up to you to decide which is your favourite.