The 2022 Audi A6 allroad is available as a 4-door, 5-seat wagon. Starting at $66,900, the 2022 Audi A6 allroad 55 Premium Plus is powered by a 3.0LL , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 28-mpg on the highway.