Mike Stevens | Dec 5, 2012

UPDATE: Audi has now revealed the RS 6. Full details here.

Audi's RS 6 Avant wagon, spied thundering around the Nurburgring in recent weeks, has snuck out onto the internet this week ahead of its official unveiling.

Obtained by Russian website Autowp, these images offer the first look at the big powerhaus and - along with the new RS 4 Avant - a preview of Audi's future 'RS' styling formula.

Technical details for the RS 6 are still to be revealed, but reports suggest the new hero wagon will utilise a more powerful version of the bi-turbo V8 that drives the 309kW Audi S6 and Bentley's 373kW Continental GT coupe.

Unlike those 'lesser' vehicles however, the RS 6 is expected to deliver around 425kW and 650Nm of power, in a bid to keep BMW's 412kW M5 in the rear view mirror.

As with all RS models, power will be sent to all four wheels, and an eight-speed automatic transmission will be charged with the task of getting it there.

According to Autowp, the RS 6 will belt to 100km/h in a properly supercar-like 3.9 seconds - but probably not with its 1680 litre rear cargo space loaded up.

On the styling front, the RS 6 Avant continues the styling evolution introduced by the RS 4, pushing the design further with a new front bumper and a nested-frame grille design.

The rear is standard RS fare however, with a subtle diffuser flanked by the familiar elliptical exhaust tips.

Watch for the new RS 6 Avant to debut at March's Geneva Motor Show, with Australian lauch details to follow.

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