Clarkston plays it up as a David v Goliath battle
In reality, the roles should be reversed - it was a lightweight purpose-built race car (the 037) vs a production-based race car. And in that year, the Audi was very close to the production car. Audi, to their detriment, stuck with the quattro layout until the bitter end of Gruppe B. Yes, even the wild S1 E2 retained the ridiculous engine position overhanging the front axle. Everybody else had purpose-built race cars with no relation to their street cars.