The Audi A5 is a series of compact executive coupe cars produced by the German automobile manufacturer Audi since March 2007. The A5 range additionally comprises the coupe, cabriolet, and "Sportback" (a four-door hatchback with a fastback-like roofline) version of the Audi A4 saloon and estate models.

Under Audi's internal platform numbering convention, the A5 is a member of the B-platform series of vehicles, sharing its platform designation with the A4 saloon and Avant. The first generation A5 (Type 8T) is therefore a member of the B8 family, whilst the second generation model (Type 8W6) is based on the B9. Both are derived from the Volkswagen MLB (Modular Longitudinal Matrix) architecture.