Compare the Vauxhall-Opel Viva Brabham 1.2 8v - [1967] vs Chevrolet Impala Custom Hardtop 6.6L V8 - [1972]. 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 Vauxhall-Opel Viva Brabham 1.2 8v or the Chevrolet Impala Custom Hardtop 6.6L V8. We'll leave it up to you to decide which is your favourite.