As part of the homologation requirements for Group B rally, the manufacturers had to produce 200 road going versions of the cars they used to compete with. The rule was kind of ridiculous given how extreme the race cars were, but it does increase the chance that regular people get to experience what they were like. Chris Harris got to test the RS200 from Ford and the Audi Sport Quattro. He does his usual excellent job of describing what the nature of the cars are like and what made them historically significant.