Compare the Chevrolet El Camino SS 454 LS6 - [1970] vs Dodge Challenger R/T 426 7.0 V8 Hemi - [1970]. 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 El Camino SS 454 LS6 or the Dodge Challenger R/T 426 7.0 V8 Hemi. We'll leave it up to you to decide which is your favourite.