Audi’s midsize sedan, the A6, has undergone minor changes for 2018, including a few new colours. The entry-level engine is a 252-horsepower 2.0L four cylinder. Next up is the 340-horsepower 3.0L V6, followed by the very powerful S6 with its 450-horsepower 4.0L V8. All these cars come with quattro all-wheel drive and the automatic gearboxes have either seven or eight speeds depending on the version.