Audi has channeled the spirit of its most legendary race cars for a wild one-off concept that celebrates 50 years of the firm's venerable five-cylinder engine.
The new GT50 concept is the latest creation from Audi's Neckarsulm-based apprentices, who each year create an outlandish one-off concept that pays tribute to a historic model or hints at a future programme.
Previous instalments include the radical RS6 GTO concept (which became the limited-production RS6 GT), a 236bhp reworking of the NSU Prinz and last year's A2 E-tron electro-mod, which reimagined the millennial supermini with modern cues and EV power - all of them marking important Audi anniversaries.
Revealed in a video taken by Audi and published by German site Stimme (below), This year's concept was chosen to celebrate a half-century of five-cylinder Audis, with 1976 marking 50 years since the launch of the second-generation Audi 100, the first mass-production car to use an inline five.
It is among the least common engine formats used in mass production, and Audi is the only manufacturer in the world still using the arrangement in its cars - with Volvo, Ford, Land Rover and Volkswagen long ago having ended production of their own versions.


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Has a bit of a designed-by-a-10-year-old-boy look about it.