Click above for high-res gallery of the Audi Sportback concept

Audi's hotly-anticipated A7 will bow in conceptual form at tomorrow's North American International Auto Show, and we have the first leaked images of the showcar, dubbed "Sportback." Details at this point remain slim, but as you can see from the photos, all of the major Audi design cues are in play, including a more nuanced version of the brand's horsecollar grille and LED eyelash headlamps.

The roofline of the "four-door coupe" is surprisingly fastback like, leading us to believe that the car could in fact be a full-blown hatchback. From the rear three-quarter view, the car actually has a certain Lamborghini Estoque quality to it, but that's mainly because of the taillamps and the angular exhaust outlets.

According to our source at Audi, the Sportback is in fact larger than the A6, and it is built on Audi's new modular longitudinal build kit (LBK), which is adjustable for length, width, and height depending on packaging needs. The same chassis setup will likely form the basis for future larger Audis, including the production version of the Sportback which is expected to be dubbed A7. We'll report back from opening day of the Detroit Auto Show tomorrow morning with more details and photos of the Sportback. so stay tuned. In the meantime, check out the high-res gallery below.

Related GalleryAudi Sportback Concept

[Source: Fourtitude]