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Audi debuts all-new R18 E-Tron Quattro with novel secondary hybrid system

This is the new Audi R18. It looks like the Bond villain of race cars (it has red running lamps), and if Audi's past is any indication, it'll prove difficult to beat in the LMP1 class of the 2014 World Endurance Championship.
The car's full name is the Audi R18 E-Tron Quattro, just like last year's car. Also like last year's car, the new R18 draws its power from a V6 turbodiesel, which powers its rear wheels, and Audi's E-Tron hybrid system, which runs its front axle. Unlike last year's car, though, this R18 has a secondary hybrid system. Audi has fitted the V6 with an electric turbocharger and figured out how to capture waste heat generated when the engine reaches its boost limit. That power can then be stored and fed back into either the turbo or the front axle's hybrid system under acceleration.
There are a number of changes to the body on the new car, forced in large part by series regulation changes. The car is narrower, particularly at the front, but it's also taller. The front end is set off by a new wing, as part of a new WEC regulation. Audi seems quite pleased about this, citing an improvement in front-end downforce and a reduction in cost. Like Formula One, the WEC contenders now have to contend with a ban on the so-called blown diffuser, which forced exhaust gases over the diffuser, creating downforce. That's necessitated some changes from Audi, although as we have no rear shots of the car, we can't tell you what it looks like.

Which would you rather have, Audi's RS5 or Mercedes' C63 AMG 507?

If you're in the market for a German sports coupe with a naturally aspirated V8, run, don't walk, to your nearest dealer because they are going to be gone very soon. European fuel economy and emissions rules have conspired to force automakers into seeking forced-induction mills. Motor Trend personality Jonny Lieberman is hosting the retirement party in the latest Head 2 Head video, where he takes on the 2014 Audi RS5 and 2014 Mercedes-Benz C63 AMG Edition 507 to decide which is the ultimate Teutonic V8.
To make the decision harder, Lieberman challenges the duo on the first soaking wet roads that Southern California has seen in ages. It forces the coupes to confront some of the actual weather that the rest of the country encounters regularly and serves to even the playing field somewhat between the charismatic rear-drive Mercedes-Benz and the all-wheel drive Audi.
It really is the end of an era for these coupes. The next Audi RS4 is rumored to switch to a twin-turbo V6, and while Mercedes won't officially admit it, the next C-Class AMG will likely switch to a 4.0-liter twin-turbo V8. And we already know the next BMW M3/M4 will rely on a 425-horsepower, 3.0-liter inline-six. Let's enjoy these eight-cylinder German giants while we can, and scroll down to watch the video.

Audi Nanuk Concept likes Parcour, puts four rings on it

Without a doubt, one of the coolest (and weirdest) debuts from this year's Geneva Motor Show had to be the Italdesign Giugiaro Parcour concept. And ever since the off-road performance coupe with Lamborgini guts made its debut, we've sort of been smitten with it. We figured this neat two-door would be a one-and-done show car, but to our delight, the folks at Italdesign worked with Audi to create this, the Nanuk Quattro Concept, which makes its debut here at the 2013 Frankfurt Motor Show.
Unlike the original Parcour, the Nanuk ditches the high-revving Lambo-sourced 5.2-liter V10 in favor of a twin-turbocharged 5.0-liter diesel V10. That's a beast of an engine, and with 544 horsepower and 738 pound-feet of torque on hand, it means the 4,189-pound, all-wheel-drive Audi can scoot to 62 miles per hour in under four seconds. Of course, being a diesel, it's surprisingly efficient, and we're told the Nanuk can achieve up to 30 miles per gallon.
As much as we sort of hate the term, the Audi Nanuk is a proper coupe-crossover if we've ever seen one, and utilizes the automaker's next-generation adaptive air suspension (the Parcour had a different pushrod arrangement) that offers a range of almost three inches of height adjustment. There's also an integral steering setup, meaning the rear wheels can turn up to nine degrees in the opposite direction of the front rollers, improving maneuverability.