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Next Audi RS4 to get an electric turbo?

We don't yet know if the next Audi RS4 will come to the US, but whoever gets it could find an electric turbocharger under the hood according to a report in Auto Express. The 4.2-liter V8 that has served for two RS4 generations is retiring from the line, replaced by a twin-turbocharged version of the supercharged 3.0-liter V6 used in the S4. But instead of using two sequential turbochargers - a smaller one to eliminate lag while a larger, more powerful turbo spools up - batteries charged by brake regeneration could power a first-stage electric turbo. The idea hasn't been publicly appointed for a particular model, as Audi's technical chief Ulrich Hackerberg has said that due to expense, that kind of setup "would only be used be used on the very top end models." Since the technology cuts down on the use of exhaust gases, it would also also help in markets like Europe where CO2 emissions are a factor. No matter whether it benefits from all conventional or some electric boost, the horsepower number for the twin-turbo V6 will be more than 420 hp but less than 503 hp, the rating of the V8-powered Mercedes-Benz C63 AMG. Auto Express believes Audi will want to maintain the power gap between the 333-hp S4 and previous, 444-hp RS4. With Hackenberg saying the new S4 will make more than 350 hp, that gets the coming RS4 up to at least 461, but AE figures it "could deliver as much as 480 hp." We'll find out sometime after the S4 launches next year.

Porsche wins the 2015 24 Hours of Le Mans

The question going into this year's 24 Hours of Le Mans was whether or not the Porsche 919 Hybrid would be able to combine its qualifying pace with race reliability. After battling neck-and-neck with Audi's R18 for most of the race, the answer is a resounding yes. Not only did Porsche drivers climb the first two spots on the podium, they did so without any major mishaps on track. This win is the first overall trophy for Porsche since 1998. Audi previously won the last five races, and 13 of the last 15. Corvette also returned to the winner's circle, with the No. 64 C7.R taking winning the GTE Pro division. The victory is the first class win for Corvette since 2011. KCMG won the LMP2 class in ninth overall. With 45 minutes to go the No. 98 Aston Martin crashed out of first place in GTE Amateur, giving the class win to SMP Racing's Ferrari and second place to the Patrick Dempsey Racing Porsche 911 RSR. For the full list of official results, click here. The GTE Pro class proved to be just as exciting as the P1 class, with a four-way battle for first after four hours into the race. For most of the race, the battle at the top went back and forth between the two German manufacturers. An tire puncture in the No. 7 Audi gave up the lead to Porsche, and moments later a crash forced the No. 8 into the garage. But a three-minute replacement of the front and rear bodywork kept the Audi in contention. As the race wore into the night, Porsche maintained a slightly faster pace than Audi. Nick Tandy took the lead on Lap 253 early Sunday morning, and car No. 19 never gave up the top position. The win is the first for all three drivers of the No. 19 – Nico Hulkenberg, Earl Bamber, and Nick Tandy. A lap behind in second was the No. 17 Porsche. The Audis fought reliability problems late in the race but still finished third with the No. 7 R18. The GTE Pro class proved to be just as exciting as the P1 class, with a four-way battle for first after four hours into the race. As the Aston Martin cars dropped away, the lone Corvette Racing entry took over, followed by a charging AF Corse team Ferrari 458 Italia. The Corvette and Ferrari continued to trade places in the final hours until gearbox trouble forced the No. 51 Ferrari out of contention. It was eventually passed by the other AF Corse car, No. 71. Nissan experienced all the pain of a first-year effort with its front-wheel-drive GT-R LM Nismo.

Audi plans RS3 for US

Rejoice, performance-car fans. The Audi RS3 (pictured above) is probably coming across the Atlantic. If that happens, the US-market RS3 will likely be a sedan, not the five-door body style offered in Europe. Hot hatch fans might shed a tear at this news, but we'll the RS3 any way we can get it. Audi of America CEO Scott Keogh feels the same way. "We really, really want the RS3," he said to Automotive News. "I'm very confident we'll see that car in the market. That's as far as I'm going to go. In Europe, the RS3 Sportback packs a 2.5-liter turbocharged five-cylinder with 362 horsepower and 343 pound-feet of torque mated to a seven-speed dual-clutch gearbox. That grunt get to the ground via a torque-vectoring all-wheel drive system that can route up to 100 percent of the power to the rear wheels when necessary. The sprint to 62 miles per hour goes by in just 4.3 seconds. Of course, a tiny, hardcore sedan isn't on every buyer's shopping list. For those who want a little more room with their luxury, the Q8 is also on the way. "That is absolutely a car that we will see in the United States," Keogh said to Automotive News. The big crossover shares its platform with the next Q7, but will have sleeker bodywork similar to vehicles like the BMW X6 and Mercedes-Benz GLE Coupe. The Q8 is slated to launch in 2017 with US sales following the European debut. Recent rumors suggest that a fully electric E-Tron version could be part of the lineup as well. Audi's American arm isn't as crossover crazy as some other automakers, however. According to Keogh, the tiny Q1 CUV might not come to the US because it's not the right fit for the market. Related Video: