Named after the famous Italian driver Tazio Nuvolari, who raced for Auto Union in 1938 and '39, the elegant Nuvolari Quattro hints at Audi's rival to the upcoming BMW 6-series. The show car uses the 5.0-liter V-10 engine that's fitted in the Lamborghini Gallardo. In this car, however, the engine is front-mounted and even more powerful thanks to the addition of twin turbochargers and direct fuel injection. With 592 horsepower and 554 pound-feet of torque, Audi claims a 0-to-62-mph time of 4.1 seconds and a governed top speed of 155 mph. Adaptive air suspension with driver-controlled height adjustment is fitted, along with a six-speed DSG transmission. The most important aspect of the exterior styling of this aluminum spaceframe concept is the new corporate grille, which harks back to Nuvolari's Auto Union racing cars. BOTTOM LINE: Tazio would have approved.