New Sport Car

German luxury automaker Audi dips into the diminutive as it unveils a concept of the pending A1, which it calls the Audi Metroproject Quattro, as a plug-in hybrid at October's Tokyo auto show. The new A1 and its expected S1 performance twin are premium subcompacts, and the mules tested to date have been caught riding on the new Volkswagen Polo's underpinnings. Whether or not the A1 gets a more