April 25-27 is the pinnacle of VIR’s sports car road racing events: the Bosch Engineering 250, a Grand-American Road Racing Series Rolex Cup event. Grand-Am’s Daytona Prototype sports cars take to VIR’s Full Course in an electrifying show as these exotic cars compete over the 3.27-mile track. The VIR round will feature the Rolex Prototypes and the GT cars in a 250-mile clash over VIR’s classic Full Course. Joining the Prototype and GT cars, SCCA Pro Racing’s Speed Challenge Touring cars bring their fender-to-fender excitement, plus Skip Barber National Series and the SunTrust Moto-ST endurance motorcycle races. Marking the series’ debut that weekend, the Volkswagen Jetta TDI cup brings a fleet of identical Diesel-powered racers at the hands of aspiring young road racers, in their inaugural race. The Society of Automotive Engineers stages their Collegiate Design Challenge at VIR this weekend as well. This competition pits teams of engineering students in a competition to design the best-engineered, best handling and most economical car. Teams from around the world are already entered.