The Audi A6 is an executive car made by the German automaker Audi. As the successor to the Audi 100, the A6 is manufactured in Neckarsulm, Germany - and is available in sedan and wagon configurations, the latter marketed by Audi as the Avant. Audi's internal numbering treats the A6 as a continuation of the Audi 100 lineage. The related Audi A7 is essentially a sportback (fastback) version, but is marketed under its own separate identity and model designation. All generations of the A6 have offered either front-wheel drive or Torsen-based four-wheel drive - marketed by Audi as their quattro system. Second- and third- generation A6 models have shared their platform with the company's Allroad models. Both petrol and diesel versions of the A6 are supplied. A wide range of engines make power units with a capacity of 150 to 333 horsepower. These are inline 4-cylinder 16-valve turbocharged engines and more powerful 3-litre units in a V6 configuration with a mechanical compressor.