One-offs, pre-production test units, evaluation vehicles, technology evaluation studies and test mules.
Prototypes
Audi A2 “Ringo” Prototype (1995)
In the early 1990s, Volkswagen Group set a corporate objective to design and produce a passenger car that met ambitious fuel-efficiency targets through the application of lightweight construction and advanced aerodynamics.
RS4 Sedan Prototype (1993)
Within this haze, an unusual model quietly surfaced in the early 1990s—the Audi 100 RS4. Despite sharing its badge with the later and far better-known B5-generation RS 4 Avant, this prototype was entirely different.
Audi V8 Avant 3.6 prototype (1989)
Built at the insistence of Ferdinand Piëch as a fully functional, road-approved family car for his wife Ursula Piëch, it remains one of the most unusual and storied vehicles ever produced by the brand.

