Until now, the A4 was a rather upright, solid, sensible sedan, while the A5 was its sleeker, sportier, sexier sibling. Going forward, Audi is signifying powertrains by model numbers. So ...

The A4 looks sharp on the outside and has one of the highest quality interiors in the executive car class. The BMW 3 Series is a slightly better all-rounder and offers keen drivers greater thrills ...