The RS5 has been spotted testing ahead of its intended launch at the Frankfurt show. The car is virtually undisguised, showing gaping TT RS-style intakes at the front.
The RS5 will be restrained but muscular and the only aspect that is hidden is the box arches that hark back to the original Quattro and recent RS6.
The RS5 is likely to get the 4.2-litre V8 motor from the recent RS4, retuned to give more power with lower emissions.
The Audi RS5 will use a quattro drivetrain with Audi’s double-clutch S-tronic transmission, the first time an Audi RS product has featured twin-clutch technology.
The RS5 employs what Audi calls active aerodynamics, including a deployable rear spoiler. It will also be fitted with uprated drilled-disc brakes.
The price could be as high as £50,000, reflecting the premium charged for the old RS4, and to provide some space between the RS5 and the £42,980 TT RS.
The RS5 Coupe will be followed by an RS5 Roadster next year, completing the A5 family and providing the replacements for the RS4 saloon and cabrio.