We don’t know what definition of the word ‘performance’ Audi works to, but apparently the 553bhp RS6 and RS7, neither of which is exactly slow, don’t meet it.

To address their chronic lack of speed, both the Audi RS6 Avant and Audi RS7 Sportback have been given a new ECU, increased turbo boost and higher rev limit, bringing the total output from their 4.0-litre, twin-turbo V8 engine to 597bhp and 553lb/ft of torque on overboost.

As a result, 0.2secs has been shaved off the 0-62mph sprint, both cars completing the run in 3.7secs. That’s quicker than a Mercedes-AMG GT S. A more substantial 1.4secs has been trimmed off the 0-124mph time, down to 12.1secs.

Audi clearly deems that kind of supercar-baiting acceleration sufficient, as it has christened the new cars ‘Performance Edition’. As per usual, top speed is limited to 155mph, those this can be optionally raised to 174mph, or 189mph with the Dynamic Plus package. Completely unfettered, both cars would undoubtedly run to well beyond 200mph.

The rest of the RS6 and RS7 Performance Edition’s running is largely standard. The power goes through an eight-speed automatic gearbox to quattro four-wheel-drive that sends 60% of the power to the rear wheels.

There’s a torque vectoring ‘sports differential’ on the rear axle and adaptive air suspension – metal suspension with Dynamic Ride Control is available as an option and handles marginally better. Variable-ratio dynamic steering is optional too, as are carbon ceramic brakes.

The Performance Edition cars are marked out by reprofiled bumpers with bigger intakes and diffusers, and gloss black and matt titanium detailing. 21in wheels come are standard.

Inside, there are ‘super sports’ seats with integrated headrests trimmed in black and blue leather and alcantara upholstery. The carbonfibre inlays are interwoven with a blue thread.

The Audi RS6 and RS7 Performance Edition cars goes on sale in November – alongside the standard cars – priced from £86,000 and £91,600 respectively.

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By Only Motors