The Audi A4 for 2006 is offered in three distinct body styles: a sedan, a wagon or a convertible. There are two engine choices, a 2.0 liter, 200 horsepower inline-4 or a 3.2 liter, 220 horsepower V6. Standard features for the A4 include dual-zone climate control, CD changer and 16” alloy wheels.