The Audi RS2 Avant, usually known as Audi 80 RS2, was a limited edition, high-performance Audi five-door, five-seat estate car (station wagon), manufactured from March 1994 to July 1995. Collaboratively designed as a joint venture between Audi AG and Porsche and built on Audi's 80 Avant, designated internally as P1 (instead of B4/8C that it was based on). It was Audi's first "RS" vehicle, and the first of their high-performance Avants (Audi's name for an estate car or station wagon); it used the most powerful and most thoroughly developed version of Audi's inline-five cylinder turbocharged internal combustion engine.

Although it was not widely exported outside of Europe, except for a few to Hong Kong, South Africa, Brazil and New Zealand, the RS2 has amassed an impressive cult following worldwide, and it is often regarded as being the vehicle that finally firmly established Audi as a producer of practical high-performance vehicles: its estate body, seating for five persons, and Audi's 'trademark' quattro permanent four-wheel-drive system as standard made it usable as a comfortable daily driver, even in poor weather conditions.