[gallery link="none" columns="1" size="full" ids="54722"] source: Audi AG Four rings, forty years, one quattro - in short: an Ingolstadt success story. The Audi quattro celebrates its anniversary in 2020. Read how the first Audi with all-wheel drive revolutionized the automotive industry. The idea behind the quattro The search for traces of the origins of the Audi quattro leads straight to the winter of 1976: At that time, Audi developed the VW Iltis off-road vehicle for the German...