Based on the current generation A6 wagon, the test mule features a more bold font grille, as well as add-on fender flares to accommodate the wider track. Other hints include the use of some larger A8 wheels and some massive ceramic brakes.
Power for the RS6 is expected to come from the new 4.0-liter V8 twin-turbo engine found in cars like the S6, S8 and the new Bentley Continental GT V8. In the Bentley it makes 500 hp and 487 lb-ft of torque, while the S8 boasts 520 hp and 48 lb-ft.
At this point further details are just speculation, but there’s a possibility the new RS6 could get boxy integrated fender flares, reminiscent of the original Audi Quattro, while some body panels could be made of carbon fiber to help shed poundage from the large and luxurious super wagon.