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Mattias Ekstr?m unleashes bonkers 600-hp Audi S1 Supercar on World RX

Mattias Ekström doesn't need to prove anything. He's won the DTM title twice and before that the Swedish Touring Car Championship. But being a racing driver as he is, Ekström has been looking for new challenges. He's contested the Swedish Rally six times, the German Rally twice, he's driven in V8 Supercars and in NASCAR. He's even won the Race of Champions. Twice. Heck, we're surprised his long-time sponsor Red Bull hasn't let him try out one of its F1 cars. But this season it's on to a new challenge: the inaugural FIA World Rallycross Championship.
Ekström drove a Volkswagen Polo fielded by Marklund Motorsport in the Swedish rallycross round last season and came in second, but this year he's diving in head-first with his own team and his own car. His outfit EKS is hard at work preparing the new Audi S1 for competition in the World RX Championship, and will field two of them this season: one for Ekström and another for JWRC champion Pontus Tidemand.
Built to compete in the top category of the championship, the EKS Audi S1 Supercar will pack a 2.0-liter turbo four with 600 horsepower, all-wheel drive and a 0-60 time of 1.9 seconds. It's expected to make its debut late in May at the World RX of Great Britain where it will have to tangle with specially prepared versions of the Citroën DS3, Ford Fiesta ST and Peugeot 208 driven by the likes of Tanner Foust, Ken Block, Jacques Villeneuve and Petter Solberg. The sole North American round will be held in Trois-Rivières, Quebec, in early August, on the same circuit that once hosted Indy Lights, ALMS, Grand-Am, Can-Am and Trans-Am races.

Audi inaugurates new R8 production line at Neckarsulm

Of all the factories which the Volkswagen Group operates around the world, the Audi plant in Neckarsulm may not be the very largest, but it is among the most diversified. That's where Audi builds versions of the A4, A5, A6, A8 and Q7 lines. It's also been home to the R8, but now the German automaker has moved supercar production to a new facility just a few miles down the road.
Back in August, Audi stopped production of the R8 at its main Neckarsulm site and moved it to the new Böllinger Höfe site in Heilbronn, restarting production just three weeks later. The new assembly line brings together various workshops that had been scattered about the Neckarsulm complex under one roof, and will surely make production of the next-generation R8 that much smoother.
The Böllinger Höfe facility is about a quarter the size of the main Neckarsulm plant, and will also house a small-scale production line - similar, we gather, to what Audi subsidiary Lamborghini recently built in Sant'Agata Bolognese - and a massive, state-of-the-art logistics center with capable of handling 4,500 containers each day.

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.