As a result, either will sprint from zero to 100km/h in just 3.7 seconds - 0.2 seconds quicker than before. For reference, that's how much time the previous-gen Porsche 911 Turbo took to hit triple digits. 0-200km/h happens in 12.1 seconds.
But not every RS6 and RS6 will be gifted with such incredible speed. Instead, the power upgrade willl come as part of an optional Performance package, which sees a unique engine tune applied to the car's twin turbo 4.4 litre V8
Opt for the dynamic package as well, and top speed rises from 250km/h to 280km/h for the RS6 Avant. The more aerodynamic RS7 Sportback will hit a maximum of 305km/h with the dynamic package installed.
Worried about the impact this new performance will have on your fuel receipts? Don't be. According to Audi, the RS6 performance and RS7 performance consume the same amount of fuel as their non-performance pack brethren - 9.6 l/100km and 9.5 l/100km respectively.
The gearbox calibration has been altered to deal with the increased output, though the quattro AWD drivetrain for both models is unchanged with a nominal 40/60 front/rear torque split and a torque-vectoring rear differential available as an option.
Externally, the RS performance models can be identified by the matte-titantium finish on the "quattro" script in the lower grille and other exterior trim pieces, while "Ascari Blue metallic" is offered as an exclusive colour for the performance package.
Unique 21-inch alloys will also sit at each corner, though Audi hasn't made mention of any tyre size increases.
Inside are the same leather-bound RS seats and other cabin furnishings as the regular RS6 and RS7, but with carbon twill blue inlays on the dash being a signature feature of the performance pack.
The RS6 and RS 7 performance will be available in Australia sometime in the second quarter of 2016, with pricing and specification details to be released closer to that date.