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 S5 a single turbocharged 2995 cc, engine, an increase of from the supercharged model. Although more powerful at low RPM, Audi made a decision to replace the supercharger with a turbocharger based on European driver's preference for smaller, more efficient, yet powerful engines, a market which Mercedes and BMW have always led. As part of the mid-generational refresh, the S5 undergoes some major front-end changes, including a complete redesign of the headlights – this means new LED DRL's, a brand-new grille loosely based on the 2012 Audi A6 grille and new fog lamps. Audi has also introduced a new rear diffuser