The annual Wörtherseetour meeting for fans of VW Group models is celebrating it’s 30th birthday this year, and Audi is bringing a hot gift to the party. Meet the one-off A1 clubsport quattro powered by a heavily-modified version of the RS 3 Sportback’s turbocharged engine. This scary little car does 0-100 kph in 3.7 seconds and 0-200 kph in just 10.9 seconds!

The heart of the A1 clubsport quattro is a five-cylinder unit displacing 2.5 litres with turbocharging and direct fuel injection. Compared with the version used in the TT RS and RS 3 Sportback on which it is based, output has been increased dramatically to 503 PS (available between 2,500 and 5,300 rpm) and 660 Nm of torque, thanks to tweaks on the turbocharger, intercooler, induction tract and exhaust line. As on the Audi A4 DTM, the tailpipe is located on the left flank, just in front of the rear wheel.

A six-speed manual transmission and quattro permanent AWD, both taken from the TT RS and enhanced, deliver the power to all four wheels. Audi did not reveal this monster baby’s true top speed without the 250 km/h limiter.

The Wörthersee showstar rolls on 255/30 low-profile rubber mounted on 19-inch alloys with a unique turbine design. Sitting behind those are large, internally ventilated disc brakes. Up front, six-piston callipers grab perforated carbon fibre-ceramic discs. Large steel discs are mounted on the rear axle. The coilover suspension of the A1 clubsport quattro features adjustable compression and rebound damping.

The front wings, the doors and the rear side panels of the A1 clubsport quattro have been widened by a 60 mm. They form horizontal “blister” edges, like those found on the Audi Ur-quattro. Air outlets are integrated into the rear ends of the wings, and the newly designed trim strips on the sills are made of exposed CFRP, as with the roof.

The cabin still looks good, but is stripped out and has no rear seats. In its place is a large crossbar to further stiffen the body and storage for helmets. A weight-optimised starter battery used in racing is mounted in the rear below the two storage compartments. The lightweight bucket seats are taken from the R8 GT and feature a carbon reinforced polymer chassis.

They’ve gone mad! Gallery after the jump.

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