Audi has certainly been on a roll for the past few days. Aside from being spotted by our spies testing out the next-generation Q3 and A1 in public roads, the Ingolstadt-based automaker is gearing up for the world premiere of the all-new A7.

To give the motoring public a glimpse of the new four-door coupe, Audi recently released a teaser photo of the new-generation A7. Based on the silhouette, the next-gen A7 will have an evolutionary design and will still come with the distinct long hood, short deck design. Curious to see at the back however, is what appears to be a retractable spoiler, reminiscent of the one used in the second-generation Porsche Panamera.

Audi gives a glimpse of all-new A7 Sportback

With just one photo there's nothing else to go on about the new A7's design. However, scale models of the four-door coupe were apparently leaked a few days ago by AutoWeek, allowing us to see more of the subtle changes.

If the photos are to be believed, the A7 Sportback's front fascia will look a lot like the new A8's. Beyond that, it looks the rear quarter panels of the A7 may also closely resemble the ones used on the A8.

As far as the rear design is concerned, Audi appears to have given the A7's taillights a major redesign. Based on the spy photos we acquired last July, both the A7 and S7 will lose the distinct taillight design from the outgoing model.

Instead, it is highly likely that the production model will carry the same look as the A8's sleek taillights. There are some minor changes sure, but both models might carry similar styling cues still.

Expect the all-new A7 to be revealed in the metal just before the year ends. On the other hand, Audi is set to reveal the next-generation A7 online come Thursday.