Every year, fans of the Volkswagen Group get together at the Wörthersee festival, held in Reifnitz, Austria, to share their passion about cars. The show is so big that the VW Group’s brands spare no money to develop dedicated one-off models for the event. Audi’s star attraction at this year’s Worthersee Tour (June 1 to 4, 2011), which celebrates its 30th anniversary, is the ludicrous A1 clubsport Quattro.
The one-off show car is a rally-inspired A1 hatch that uses a heavily modified version of the 2.5-liter turbocharged five-cylinder petrol engine found in the TT RS and the RS3 Sportback. The five-pot normally produces 340-horsepower and 450 Nm (331.90 lb-ft), but thanks to the systematic tuning of the turbocharger, intercooler, induction tract and the exhaust, output has been boosted to 503-horsepower and 660 Nm (487 lb-ft) of torque.