Audi RS4

There was no RS 4 built on the Audi "B6" platform, which served as the basis for the Audi A4 between 2001 and 2005. The second Audi RS 4 quattro (Typ 8E) was built on Audi's "B7" platform, by quattro GmbH in Neckarsulm, Germany. It was unveiled in February 2005 at Audi's 'quattro Night' celebration at the company headquarters in Ingolstadt, Germany.

The RS 4 became available to European customers in mid-2006. It was introduced at the 2006 North American International Auto Show in January, and arrived in June 2006 in North America. The production run of the B7 RS 4 was 2006 to 2008 inclusive, although only 2007 and 2008 model year were sold in the United States. Approximately 10,000 B7 RS 4s were built, of which around 2,000 are in the USA.

The B7 RS 4 is an almost complete departure from previous Audi "RS" cars, as it was initially available as a four-door five-seat saloon/sedan, with a five-door five-seat Avant, and two-door four-seat Cabriolet versions arriving later.