Audi has built its reputation in rallying, and after decades of shouting about its Quattro all-wheel-drive system, it should be the best in the business, right? Team O'Neil Rally School instructor ...

Audi’s relationship with unconventional powertrains didn’t start with rally dominance—it began quietly in 1978 with a humble two-liter diesel making just 70 horsepower. A year later, everything ...