Audi RS4 Tuning

UK Builder Reworks Audi Ur-Quattro Around RS4 V8 and Targets More Than 600 Horsepower

Audi Ur Quattro by Audacious Automotive (12)

A small British company has started work on an Audi project built from two separate donor cars and a large budget. Audacious Automotive plans to reshape the classic Ur-Quattro using hardware taken from an RS4, with a V8 replacing the original five-cylinder layout. The result stays close to old Audi thinking in one area at least, because the engine still sits far forward in the chassis.

The original Audi Quattro built its reputation around a turbocharged five-cylinder engine, all-wheel-drive traction, and suspension shaped by rally development. Audacious Automotive keeps the same base silhouette, though almost every major component underneath changes direction. The company describes the car as lighter than the factory original and gives the shell a new body built around steel and aluminum during the first development phase.

Audi Ur Quattro by Audacious Automotive (18)
Audi Ur-Quattro by Audacious Automotive

This prototype uses the 4.2-liter V8 taken from an RS4. A supercharger joins later in the build, and projected output rises beyond 600 horsepower. Audacious Automotive says the engine fits cleanly inside the front section of the car, which matters because packaging remains tight. Audi front-engine layouts already pushed engines deep into the nose, so this unusual conversion still follows familiar proportions.

Photos released by the company show fabrication already well advanced. Bare metal sections surround the body, while the engine bay and structural work suggest the first car remains in proof-of-concept form rather than final trim. Audacious Automotive notes this early version relies on steel and aluminum before later customer cars switch materials.

Audi Ur Quattro by Audacious Automotive (3)
Audi Ur-Quattro by Audacious Automotive

Production examples move further from the prototype. Finished customer builds replace metal exterior panels with full carbon-fiber bodywork. That change forms part of the final specification, though pricing already places the project in rare territory before carbon parts even enter the picture.

To commission one, a buyer must provide two donor vehicles. Audacious Automotive asks for both an RS4 and an Ur-Quattro before work begins. On top of those cars, the company requires around $470,000 for the conversion itself. At that level, donor sourcing almost becomes a secondary issue, though both remain necessary before assembly starts.

Audi Ur Quattro by Audacious Automotive (17)
Audi Ur-Quattro by Audacious Automotive

The first completed car will not stay alone. Audacious Automotive says further examples are planned if enough buyers commit to the concept. So this first build acts as both a demonstration and a sales template.

The name fits the financial side, perhaps more than anything else. Yet the engineering direction stays clear. A lightweight Quattro body, carbon-fiber planned for later cars, RS4-derived V8 power, and forced induction aimed above 600 horsepower place this British build in a narrow category where old Audi identity meets expensive rework without trying to hide either side.

Audi Ur-Quattro by Audacious Automotive – Photo Gallery

Ryann Antony
the authorRyann Antony

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