The Audi A6 is a fifth-generation executive car manufactured by German automaker Audi. It is available in saloon and estate configurations, with the latter marketed as the Avant. Audi's internal numbering treats the A6 as a continuation of the Audi 100 lineage, with the initial A6 designated as a member of the C4-series. The related Audi A7 is a Sportback (liftback) version of the C7-series and C8-series A6.
The A6 has been offered with either front-wheel-drive or Torsen-based four-wheel-drive, marketed by Audi as their quattro system. It has also been used as the basis for the company's Allroad models since 1999. Petrol and diesel versions of the A6 are available, with power outputs ranging from 150 to 333 PS (110 to 245 kW). These are inline four-cylinder turbocharged engines and more powerful 3-litre units in a V6 configuration with a mechanical compressor.
The Audi 100 (or Audi 5000 in the United States) was the predecessor to the A6. It was released in three successive generations (Audi C1, Audi C2 and Audi C3). In 1994, the latest generation (C4) of the Audi 100 received a facelift and was renamed as the Audi A6, to fit in with Audi's new alphanumeric nomenclature.