Last year we saw Audi take the wraps off several variants of its sporty TT, with the unveiling of the TT-S, 2.0L TDI diesel-powered TT, and finally, the entry-level 1.8L TFSI model. However, there’s one more TT variant in the works and it could potentially be the fastest production TT ever. The new variant is the performance RS version of the TT, which has officially been revealed ahead of its world debut at the Geneva Motor Show next week.

Simply called the TT-RS, the latest model sees the return of an Audi five-cylinder powerhouse as well as the introduction of a host of other features. The new 2.5L petrol engine delivers a stunning 340hp (250kW) and features both direct-injection and turbocharging technologies. This will see it accelerate from 0-100km/h in just 4.6s for the coupe and 4.7s for the roadster, and easily reach an electronically controlled top speed of 155mph. The top speed can be raised to 174mph if you pay Audi extra to remove the limiter. Audi’s turbo engines are renowned for their relatively flat torque curves, and this one is no different. It generates 450Nm from 1,600rpm to 5,300rpm and should deliver easily accessible performance.

All models are fitted with a six-speed manual and ventilated disc brakes with black four-piston aluminium callipers and diameters of 370mm at the front and 310mm at the rear

One RS trademark that has made it to the TT-RS is the addition of the sport button, which alters throttle response and also opens a flap in the left exhaust tailpipe to increase the rumble. The standard electronic stability software has been replaced with a more sporty version that is more forgiving to sideways action and can also be switched off completely for maximum fun.

Other RS specifics include a quattro permanent AWD system, a sophisticated electronic chassis and suspension management system, a fixed rear wing as opposed to the adjustable spoiler found on more mundane TT models, 18in aluminum wheels, twin-exit oval exhaust pipes. If you really don’t like the fixed wing, Audi also gives you the option for a more discreet foldaway version.

Both a new TT-RS Coupe and Roadster will be available at launch, with the first cars scheduled to hit showrooms in Europe by the middle of the year.