Audi will unveil the sedan version of the sporty RS6 this October at the Paris Auto Show. Latest spy shots reveal that the car is in the final stages of development and is ready to give headaches to the 507-hp Mercedes-Benz E63 AMG and the 500-hp BMW M5.

The RS6 sedan will be powered by a V10 twin-turbo FSI direct-injection engine producing 580-hp. Now imagine what tuners will do to this car!

Stay tuned, more details will follow shortly.

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