Audi has released the details on its new four-door RS6 and A6 sedans for 2009.
The RS6 features a direct-injected, twin-turbo V10, with peak power of 580hp generated between 6250 and 6700rpm.
Audi says it will reach 100kmh in 4.5 seconds and has a top speed of 250kmh.
It also has a six-speed tiptronic transmission, Dynamic Ride Control, and sits on 19-inch wheels.
The standard A6 sedan and Avant benefits from the new MMI system. An S-line package includes 18-inch wheels and a sports suspension that drops the ride height by 30mm. Six petrol engines and four diesels will be available.