Compare the Ford Fiesta ST 1.5 Turbo 5 door - [2018] vs Seat Leon 2.0 16v TDI FR - [2006]. 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 Ford Fiesta ST 1.5 Turbo 5 door or the Seat Leon 2.0 16v TDI FR. We'll leave it up to you to decide which is your favourite.