Compare the Jaguar XJ R-S 6.0 V12 - [1989] vs Alfa-Romeo Giulietta 235 Cloverleaf - [2010]. 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 XJ R-S 6.0 V12 or the Alfa-Romeo Giulietta 235 Cloverleaf. We'll leave it up to you to decide which is your favourite.