The spy photographer who caught this car tells us the fire started under the hood, and the occupants pulled over and hopped out as soon as they noticed. A roadside assistance van came by, and the driver attempted to put out the fire with an extinguisher, but it wasn't enough. The photographer tells us that the car was destroyed in 15-20 minutes. And "destroyed" is no exaggeration based on the photos.
Fortunately, no one was hurt. Unfortunately for us, this prototype doesn't reveal anything more about the upcoming A7. The bodywork, before being engulfed in flames, was the same as the current model. The only difference to the present A7 was the addition of fender flares. Since the new car will have a completely different body, we don't think the flares are especially meaningful except to indicate the new car will be a bit wider. For a better look at the next A7, specifically the fast S7 version, check out these spy photos.