Compare the Ariel Atom V8 500 - [2008] vs SSC Tuatara 5.9 V8 Twin Turbo 91 Octane - [2018]. 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 Ariel Atom V8 500 or the SSC Tuatara 5.9 V8 Twin Turbo 91 Octane. We'll leave it up to you to decide which is your favourite.