Compare the Nissan Silvia S15 Spec R - [1999] vs Ford Mustang Hardtop 289 4.7 V8 - [1965]. 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 Nissan Silvia S15 Spec R or the Ford Mustang Hardtop 289 4.7 V8. We'll leave it up to you to decide which is your favourite.