The 2010 Audi RS5 coupe test mule has been spied on public road near the Nurburgring. it is rumored the production version will run up to 500 hp by V10 engine. We suspect Audi will adapt the RS6’s twin-turbocharged, 580 hp 5.2-liter V10 for duty in the RS5, although it’s likely to be de-tuned for the coupe.
Also you can see a beefier rear bumper, RS-specific dual oval exhaust outlets and slightly flared fenders. The brakes have grown in proportion to the wheels, filling the inside of the 20-inch lightweight rollers with a minimal amount of clearance, while inside, a set of aftermarket Recaros have been fitted for prototype duty. The 2010 Audi RS5 will make its world premier at the Frankfurt Motor Show in September.