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Audi reveals even more efficient 2015 R18 E-Tron Quattro

We've seen two of this year's LMP1 manufacturer challengers – Porsche's updated 919 Hybrid and Nissan's GT-R LM Nismo. Audi has finished cooking up the successor to its Le Mans champion and unveiled the fifth-generation R18 E-Tron Quattro, even better than before. The bodywork monocoque is carried over, but the body around it has been reshaped to improve airflow from front to rear with a new hood, front fenders and wheel arches, and radiator configuration. The engine cover behind the cockpit is shrunk more closely around the engine, and there are new headlights. The hybrid system can expend double the energy per lap this year, putting Audi in the four-megajoule class under the energy-use regulations. That extra energy will come from 17-percent more capacity built into the flywheel storage system and an electric motor good for 272 horsepower. The revisions haven't increased the weight of the car, pegged to the minimum allowed at 870 kilograms. They have, however, forced changes to the TDI engine, which has to use 2.5-percent less fuel per lap to offset the increased hybrid output. The 558-hp V6 has been optimized such that it "managed to more than compensate for the loss" of fuel allowed, and Audi expects "significantly" lower lap times this year and less fuel used. We're still waiting to see what Toyota has done to its World Endurance Championship-winning racer, but we're already looking forward to this year's Le Mans. It's going to be cracking. You'll find a press release below the videos with more info on the Audi. Related Video: New Audi R18 e-tron quattro even more efficient - Aerodynamics, hybrid drive and many other details improved - Efficient TDI engine consumes even less fuel than before - Technologies from Le Mans winning cars now in production at Audi Ingolstadt, March 21, 2015 – Audi is starting the 2015 season with a thoroughly revised R18 e-tron quattro. In the FIA World Endurance Championship (WEC) and in the Le Mans 24 Hours as the season's pinnacle event, Audi is going to compete with a hybrid sports car in the 4-megajoule class. A twofold quantity of hybrid energy, fundamentally revised aerodynamics, the next step in lightweight design and a lot of detailed work characterize the fifth generation of the Audi R18. "The possibilities of the revolutionary regulations that have been in effect for LMP sports cars since 2014 are far from having been fully used.

Audi spotted testing new S4 at the Nurburgring

Where there's smoke, there's fire. Only in this case, the smoke is the upcoming new Audi A4, and the fire is the S4 spotted undergoing testing in this latest batch of spy shots. Snapped in both sedan and Avant wagon forms while undergoing testing on and around the Nurburgring – where else? – the next-generation Audi S4 will of course be based on the new A4 that's anticipated to debut in Frankfurt this September. That means MLB Evo architecture and styling that takes a page out of the new TT's playbook. But in S4 trim, it'll be altogether more performance oriented. Expect an even more powerful version of the outgoing model's 3.0-liter supercharged V6, pumping out a good 340-350 horsepower to all four of its driven wheels. That power will help it keep pace with the new Mercedes C450 AMG Sport. It won't have to take on the new C63 AMG directly, though, as that'll be the job of the next RS4 that will slot above it. But since that model may never make it to US showrooms, this will stand as the flagship of the new A4 family as far as the American market is concerned. Related Video:

Audi's electric E-Tron Quattro spied for first time in testing

Last October, Audi's chairman said the company would be launching its first mainstream full electric car: the E-Tron Quattro crossover. The car was first shown in 2015 as a concept, and now we got our first glimpse of a production version in testing, thanks to one of our spy photographers. From the looks of it, it won't stray far from the concept. Up front, the E-Tron has the same square-jawed hexagonal grille as the concept, and it's flanked by headlights similar to those of the new A8. It does differ from the concept a bit in the pattern of the grille. Instead of the odd horizontal slats, it has large vertical bars that were first shown on the Audi Q8 concept. The grille in the lower bumper is also a little larger and more simplified than the concept, and the hood vents have disappeared. The side profile continues to draw from the E-Tron concept. It looks more like a lifted wagon than a traditional, upright crossover. The heavy use of black plastic cladding and wheel arches also is nearly identical to the concept. It should also make the E-Tron look right at home next to the A4 Allroad. At the back, the E-Tron also retains its fairly raked rear window. There has been some simplification. It seems the full-width taillights have disappeared in favor of more conventional separate lamps. The polished aluminum faux skid plate in the rear bumper has also been traded for black plastic. We will probably see the production version of the E-Tron within a year. Audi already confirmed that it would begin production in 2018 at a factory in Brussels, Belgium, and it will launch a new line of EVs for the company. When the concept was shown, Audi said the E-Tron would produce 429 horsepower from three electric motors and have a range of 311 miles. Audi also claimed that with a powerful enough charger, it could recharge fully in 50 minutes. There's a decent chance those numbers won't change too much. The charging capability might not be there, but the power and range would make the E-Tron Quattro a close competitor to the Tesla Model S, which gets under 300 miles of range with the 75 models, and over 300 with the Model S 100s. Related Video: Featured Gallery Audi E-Tron Quattro View 11 Photos Image Credit: CarPix Green Spy Photos Audi Technology Emerging Technologies Crossover SUV Wagon Electric Future Vehicles Luxury audi e-tron Audi e-tron Concept audi e-tron quattro concept