The A6 sedan has three engines available: the 3.2-liter V6 with 265 hp, the supercharged 3.0-liter TFSI V6 making 300 hp and the 4.2-liter FSI capable of 350 hp. The Audi A6 Avant wagon offers only the 3.0-liter engine. The S6 features a 5.2-liter FSI engine producing 435 hp. The A6 sedan, in addition to the choice of engine, offers several trim levels: 3.2 Premium, 3.2 Premium Plus, 3.0T Premium, 3.0T Prestige and 4.2 Prestige. The A6 Avant comes in Premium, Premium Plus and Prestige trims, but the S6 has just one trim level.