Below we have the Audi A4 sales figures and reporting data for the United States and Canada. The Audi A4 is a line of compact executive car that competes with the BMW 3 series and Mercedes C Class. The B8 and B9 versions of the A4 are built on the Volkswagen Group MLB platform shared with many other Audi models. With a longitudinal engine design and transaxle transmission with both front and all-wheel drive options this is Audi’s volume model. Audi A4 sales includes Audi A4 Sedan and Audi S4 Sedan, but does not include Audi A4 allroad.