First appearing in 1980 at the Geneva auto show and later on its legendary Group B rally cars, the quattro all-wheel-drive system has become as synonymous with German manufacturer as the four interlocking rings of its badge. To celebrate 40 years of quattro, Audi is releasing the TT RS 40 for the German market, limited to 40 units. Power comes from Audi's turbocharged inline-five making 400 horsepower and 394 lb-feet of torque, good a 0-60 sprint of 3.7 seconds, and a top speed of 174 MPH. The exterior is where the TT RS 40 makes an even bigger statement, with Alpine paint and decals that recall Walter Röhrl's Pikes Peak-winning Audi Sport quattro S1. Inside are racing-inspired touches like black Alcantara and a carbon-fiber bulkhead brace behind the seats. The TT RS 40 goes on sale in Germany in October 2020.