Compare the Lexus LS 600h - [2012] vs Subaru Impreza RB5 - Classic - [1999]. 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 Lexus LS 600h or the Subaru Impreza RB5 - Classic. We'll leave it up to you to decide which is your favourite.