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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.

24 Hours of Le Mans an on-and-off love affair

There was little usual about this year's 24 Hours of Le Mans - intermittent rain in the weeks before the race meant cars didn't get on track as much as they wanted, and intermittent rain during the race meant cars went off track a lot more than they wanted. The race started with a wet track, and one of the records broken because of the random downpours was the number of times the safety car led the field - 11 times this year - although the record of two hours and 53 minutes of lapping behind the safety car, set in 2011, was not eclipsed.
None of that served to dampen the action. With little more than an hour left in the race there were cars still only a few seconds apart fighting for position, leads still changing because of pit stops and everyone drafting anyone they could.
Things didn't go the usual way up front, either - well, not exactly...

2016 Audi A6

After dodging light traffic for more than 10 miles at speeds never exceeding 85 miles per hour, the left lane of the derestricted autobahn ahead of us finally opens wide. This is the opportunity we've been waiting for, and we bury the accelerator against its stop and hold it there. The transmission attached to the turbocharged four-cylinder of our 2016 Audi A6 drops a couple gears and begins an arduous battle against aerodynamic drag.
The sleek sedan cuts through the wind effortlessly up until about 125 mph, after which the speedometer needle slows noticeably as the outside world continues to blur. By 145 mph, there's no longer a discernible feeling of acceleration, yet the bright-orange speedometer needle continues its climb. Finally, the speedometer nearly reaches 160 before we are forced to firmly brake and return to saner speeds because of traffic looming ahead.
Automakers routinely host us in Europe and elsewhere to sample their wares in a much less restrictive driving environment. Which explains why we find ourselves standing in Dresden, Germany, a stunningly beautiful 800-year-old city along the Elbe River, overlooking Audi's latest executive express.