Compare the Audi A3 2.0T FSI S-Line - [2005] vs Seat Ibiza 1.8 20vt FR - [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 2.0T FSI S-Line or the Seat Ibiza 1.8 20vt FR. We'll leave it up to you to decide which is your favourite.