One vehicle meant to break that tradition is the Audi A3.Smaller and lighter than an A4 2.0T Avant Quattro, the front-drive Audi A3 presents a strong argument for buying a bargain sport wagon, provided one goes easy on the options.It's an upscale alternative to more mainstream hatchbacks, a cheaper alternative to a regular luxury wagon, and with the clean-burning diesel engine, an extremely-fuel