Compare the Porsche Boxster 2.7 987 - [2004] vs BMW 3 Series 335d xDrive LCI Touring F31 - [2015]. 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 Porsche Boxster 2.7 987 or the BMW 3 Series 335d xDrive LCI Touring F31. We'll leave it up to you to decide which is your favourite.