All-new wagon spotted alongside sedan twin

The next-generation Audi A6 Avant has been spied during development testing, giving us a first look at the luxury marque's upcoming large wagon.

Despite being camouflaged in a swirly black-and-white wrap, we can see the A6 Avant will look very much like the sedan (also pictured), albeit with a more practical roofline and rump.

Compared to the current model, the new A6 in both body styles appears lower and wider, giving it a more aggressive and athletic stance.

The high roofline of the Avant extends into a fastback-style tailgate, though we'd expect nothing less than cavernous space from the upcoming wagon.

Audi has done a good job at keeping the resemblance between the sedan and wagon too, with the wagon prototype here sporting similar LED tail-lights to the sedan, joined through the centre of the tailgate by a camouflaged strip – likely to be finished in chrome.

We're not so keen on the fake exhaust tips in the bumper, though, which are essentially two trapezoidal chrome frames.

Like the recently-revealed A7 Sportback, the new A6 range will be filled to the brim with the company's latest driver-assistance technologies, and will likely be capable of semi-autonomous driving.

Motivation should come from a range of four- and six-cylinder turbocharged petrols and diesels – and we'd expect a twin-turbocharged V8 to feature in the eventual S6 and/or RS6 performance heroes.

V6 versions should also be fitted with the 48V mild-hybrid system fitted to six-cylinder versions of the A7, which should improve efficiency even further.

The A6 sedan should be revealed sometime this year – either at Geneva in March or Paris in October – with the A6 Avant to follow around 6 months later. From there, expect an additional 6 months for the S6 and/or RS6, though we'd argue the latter is a definite.

Stay tuned to CarAdvice for more updates in the coming months. Click the photos tab for more images.