Audi TT a 'show car', Audi has not ruled out the possibility of small-scale production. With its world debut at the 2009 Geneva Auto Show, and developed by Audi's high-performance subsidiary quattro GmbH at Neckarsulm, Germany, Audi released the first ever compact sports car Audi "RS" variant – the , which was available from 2009 in Coupé and Roadster variants. The TT RS featured an all-new 2.5-litre Inline-5 turbocharged petrol engine. This new engine produces a DIN-rated power output of from 5,400 to 6,700 rpm, and torque of at 1,600–5,300 rpm. Ever since the original Audi "RS" model – the Audi RS2
Audi 100 100s (largely in European style but with tail lights in American style) were also assembled in Changchun. The 1.8 litre engine was known as the "QG18". Hongqi production commenced in 1993 and ended in 2006 where the Toyota Crown Majesta S180 replaced it as its successor under the name HQ3 and HQ430. At the Geneva Motor Show in March 1990 Audi presented its first iteration of the Audi Duo (or Audi 100 Avant Duo) experimental vehicle, a plug-in parallel hybrid based on the Audi 100 Avant quattro. This car had a Siemens electric motor which drove the rear wheels. A