Compare the Chevrolet Impala SS 427 - [1967] vs Mercedes CLA 45 AMG 2.0 Turbo - [2013]. 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 Chevrolet Impala SS 427 or the Mercedes CLA 45 AMG 2.0 Turbo. We'll leave it up to you to decide which is your favourite.