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Don't hold your breath for an Audi RS8

There was a time not so long ago when Quattro GmbH produced essentially one model at a time. But that time is behind us. These days it's expanding into a full-fledged performance division to rival Mercedes-AMG and BMW's M department. Quattro GmbH is currently building the Audi RS4 Avant, RS5 coupe and cabrio, RS6 Avant, RS7, RS Q3 and the TT RS coupe and roadster - not to mention the R8. And while it's showing no signs of slowing down, but the latest intel from across the pond suggests we shouldn't count on an RS version of Audi's flagship sedan.
This according to Car and Driver, which spoke to Stephan Reil, the chief engineer at Quattro GmbH. Reil says Audi works on a teutonically rigid performance formula: an RS model has to have 20 to 25 percent more power than the existing S version. Considering that the existing S8 makes 512 horsepower and the RS7 a solid 553, we're not sure Audi really needs anything more powerful. But by Reil's calculations, the RS8 would need to pack between 630 and 655 hp, which would put it well ahead of rivals like the 550-hp Jaguar XJR, the 540-hp BMW Alpina B7, the 523-hp Maserati Quattroporte and even the new 577-hp Mercedes-Benz S63 AMG - and in league only with the even more powerful S65 AMG, which in its outgoing form produced 630 hp.
The question then comes down to whether there are enough customers lining up for the S65 that Audi would want to poach away from Mercedes. Or perhaps more pertinently, whether it might end up just taking customers from the new Bentley Flying Spur, which is already offering 616 horsepower in an even more prestigious, if less performance-focused package. Either way you look at it, Audi is apparently steering clear.

Audi Sport Quattro Concept speaks softly, carries a 700-hp stick

As promised, Audi has unveiled its Sport Quattro Concept here at the Frankfurt Motor Show, which takes inspiration from the 2010 Paris Motor Show debut known simply as the Quattro Concept. Both cars clearly seek to draw upon the company's legendary 1980 Ur-Quattro and its closely related Sport Quattro short-wheelbase rally special, yet this concept car looks more production-minded than the 2010 starlet.
Despite its more conservative duds, this handsome and muscular coupe actually packs significantly more power than the 2010 Paris showcar. In fact, it musters 700 horsepower and 590 pound-feet of torque from its plug-in hybrid powertrain, versus the Quattro Concept's more historically appropriate 2.5-liter five-cylinder turbo with 408 hp and 354 lb-ft. We're not going to complain about a twin-turbo 4.0-liter V8 plus an electric motor, nor will we grouse about its 3.7-second 0-62 mph dash, 190-mph top speed or 2.5 liters of fuel per 100 kilometers on the Euro cycle (roughly 94 miles per gallon US).
Stubborn rumors abound that Audi will offer a limited-edition version of this four-place coupe for sale, but for now, the company isn't talking. If such a model is offered, it's expected to cost significantly more than the R8 supercar, which might be a tough sell considering that vehicle's similar performance and more voluptuous - if less practical - shape.

Tom Kristensen walks through a perfect lap of Le Mans in Forza 5

One of the best ways of learning a new track, aside from driving it, is to hear someone that's intimately familiar with it give you a good walkthrough. That's just what you'll get here, as the winningest driver in 24 Hours of Le Mans history, Tom Kristensen, walks you through the Circuit de la Sarthe's high-speed, 8.5-mile strip of pavement.
Kristensen is dubbed over scenes of drivers from a Forza Motorsport 5 contest lapping the track at the wheel of an Audi R18 E-Tron Quattro, adding a bit of visual sense to the Danish drivers description of the track.
With the 2014 24 Hours of Le Mans kicking off this weekend, this is just the sort of video you'll want to watch to get you in the mood. Take a look below, and then let us know what you think in Comments.