Audi introduced their TT sports car in 1998. Available as a coupe or roadster, the Audi TT takes its name from the famous Isle of Man Tourist Trophy (TT) motorcylce races, where NSU used to compete. NSU and Auto Union were the two companies that merged to create Audi. The TT series of sports cars have been built in three generations: Mk1 (1998-2006), Mk2 (2007-2014), and Mk3 (2015 - ). Performance variants such as the TT RS have also been offered during production.