Audi has pulled the covers off its new TT RS in Beijing. The most powerful ever production TTis available as a Coupé or Roadster with both models powered by a 2.5-litre TFSI engine - with a 17 percent increase in performance. 0-62 takes just 3.7 seconds, and top speed is 174mph. The new TT RS is fitted with 19-inch alloys as standard, sits ten millimetres lower than the base model and has new 3D effect organic LED rear lights. Available to order this summer, prices have yet to be announced.