ABT is probably the biggest tuner of VW Group cars, and so the improved version of Audi's best-seller is an obvious target. Yes, we're talking about the 2013 Audi A4, which has been enhanced in every way and has been renamed the AS4.

The A4 is an important car for us, too. It always re-defines the premium standard for medium-sized cars. Our AS4 is definitely state-of-the-art. It combines sportiness and assertiveness, says Hans-Jurgen Abt.

One the performance side, the tuner has targeted th... [...]

Source: autoevolution