The most powerful series production Audi TT ever, goes on sale later this month. Available in both Coupé and Roadster form, the new TT RS delivers a sub-four-second 0-62 time for both models and a potential top speed of 174mph. Lighter than its predecessor by 26kg, it’s powered by a newly developed 2.5-litre TFSI engine pumping out 400PS - that’s 60PS more than the outgoing model. The new Audi TT RS is priced from £51,800 OTR for the Coupé and £53,550 for the Roadster.