[source: Pirelli World Challenge Public Relations] Audi Sport Named Presenting Sponsor for PWC Grand Prix of Virginia set for April 27-29 Some 100 cars set to compete on fast, popular VIR road circuit ALTON, Va. – Pirelli World Challenge announced today that Audi Sport will serve as the presenting sponsor for the upcoming PWC Grand Prix of Virginia schedule for April 27-29 at the picturesque 3.27-mile, 17-turn VIRginia International Raceway permanent road circuit in south Virgin...