Now here's a bit of unexpected test-car porn. Quattro World readers caught an apparent Audi RS7 test vehicle in Las Vegas, clad in stealthy matte black and powered by the same 4.0-liter TFSI V8 as the new Bentley Continental GT.
The new, biturbo powerplant is expected to produce upward of 550 hp, making the RS7 a bona-fide AMG beater.
Look closely in the photo above (and in the photo below), and you'll see the RS7's co-tester. If you dream really hard, it might just be the US-elusive RS6 Avant being prepped for this side of the Atlantic.
[UPDATE: Yes, the RS7's testmate is an RS6 Avant. Or, as it's pronounced around these parts, the "do want."]