The Audi "UR" Quattro is based on the Audi coupe and was built to go rallying with 4wd. And is a early Gr B. (or was it even Gr. 4?) model if i remember correctly? The "UR" quattro was thought to be to big and Audi came up with the homologation model Audi sport quattro (214 made, 20 S1 "EVO" models)
The Audi sport quattro could be bought as a street car just as the RS200, Peugeot 205 T16 amongst others.. bot it was VERY expensive. It had 306 hp,
and a leather interior.