The Audi Quattro 20 V is an AWD sports coupe built from 1989 to 1991. It was the second most powerful car in the Quattro coupe model range from 1980 to 1991, right behind the homologation Sport Quattro model. The Audi Quattro is mostly notable for being the first Audi to use the quattro AWD system. The rally version of the car (S1 Quattro) was the world's first rally car to use an AWD system, which helped the S1 to gain huge success in Group B racing.