Audi's A4 remains one of the best cars in this class. It combines clean looks, excellent handling, a brilliant interior, and granite build quality. For 2001, the 1.8 T turbocharged engine gets a big boost in power.There's also a boost in safety: An electronic stability program is available to help keep you on the road during those moments we try to avoid, along with Audi's superb quattro all-wheel-drive system. Curtain-style side-impact airbags with rollover protection are standard. Next Page