The Audi A4 and S4 are a compact luxury sedan. They aim to bring a high quality all-around driving experience to buyers looking for a bit of practicality and luxury in the mid $30,000 range. With more ...

A powerful 252-horsepower engine combined with Audi's excellent quattro all-wheel-drive system, and the A4 gives BMW's 3-Series and Mercedes' C-Class a serious run for the money, while its sporty ...