The TT RS will use a 2.5-litre in-line five-cylinder petrol unit, its first five-pot engine in ten years. Early reports indicate that Audi will boost performance to a hefty 350bhp using twin sequential turbochargers.

Five Alive for Hottest TT

Work is under way to develop the hottest ever version of Ingolstadt's sports coupe, likely to be badged RS. It promises to be a real alternative to the Porsche Cayman when it goes on sale in 2008 for around 50,000 Euros.

The TT RS will use a 2.5-litre in-line five-cylinder petrol unit, its first five-pot engine in ten years. Early reports indicate that Audi will boost performance to a hefty 350bhp using twin sequential turbochargers.

All this grunt will be channeled through Audi's permanent 4WD quattro system and a six-speed manual gearbox though the DSG dual-clutch system will also be available as an option. Expect sporty styling with bespoke wheels, alloy-effect door mirrors, aggressive bumpers, RS-badges on the brakes and sill extensions.

Volkswagen's new 280bhp 3.6-litre V6 petrol engine, which is also lined up for a hot version of Volkswagen's European market Passat, will be released at the same time in a more refined form, to replace the 3.2-litre V6 currently powering the range-topping TT.

Be part of something big

SPY PHOTOS: Audi TT RS