Gor134
Kraftkurve King
Audi seems to be sharing headlights between the RS6 and RS5 models. And no, I don't have the cars mixed up as the license plates of the rear match the correct corresponding rear views of each model. Even the bumper's look to be identical.
It's an early stage prototype.
The A5 and A6 share a lot of chassis components with the current A5 moving to the A6's production site as well.
No surprises that the prototype uses the RS 5 front end to hide the design, after all they will be using the same powertrain too.