At the height of the Group B rallying formula, things started to get out of hand, with spiraling horsepower figures and ...

But nothing pushed this adrenaline-pumping insanity as much as Group B, so let's take a look at the best car to ever come out of that lawless class. I am, of course, talking about the Audi Quattro ...

Audi has made some of the best rally cars around, with its Group B cars arguably being its most recognizable models. The German automaker also participated in IMSA with the 1989 Audi 90 quattro ...

Audi has gone through some wacky phases with ... Most Audis saddled with the Volkswagen Group's ubiquitous 2.0-liter turbo engine are marked as 45 TFSI, but what all does that mean?