Compare the Ford Fiesta ST 1.5 Turbo 5 door - [2018] vs Ford Focus 2.0 ST-3 TDCi 185PS - [2017]. 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 Ford Focus 2.0 ST-3 TDCi 185PS. We'll leave it up to you to decide which is your favourite.