MINI’s got one. So does BMW, and so does Benz. Even Volvo has a small, small car—and now Audi’s lined up a place to build its own entry-level car. The European press is calling the new car the A1. Speculation says it’s going to be a hash of VW Polo and Golf underpinnings with a fresh Audi skin. The new car is likely going to be built in the Belgium plant that Audi yesterday said it would take over from sister Volkswagen. The new car is due sometime in 2009, and is set to take on the Cooper, C30, A-Class and 1-Series in the growing premium subcompact dogfight.Audi’s New Plant for the A1?