Compare the Audi A6 3.0 TDI BiTurbo Quattro Tiptronic - [2016] vs Maserati 425 2.5L V6 BiTurbo Saloon - [1984]. 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 Audi A6 3.0 TDI BiTurbo Quattro Tiptronic or the Maserati 425 2.5L V6 BiTurbo Saloon. We'll leave it up to you to decide which is your favourite.