Compare the Jaguar Mark X 4.2L Overdrive - [1964] vs Abarth 500 Opening Edition 1.4 Turbo - [2008]. 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 Jaguar Mark X 4.2L Overdrive or the Abarth 500 Opening Edition 1.4 Turbo. We'll leave it up to you to decide which is your favourite.