Compare the Pagani Huayra 6.0 V12 Twin Turbo - [2011] vs Ultima GTR 720 - [2000]. 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 Pagani Huayra 6.0 V12 Twin Turbo or the Ultima GTR 720. We'll leave it up to you to decide which is your favourite.