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Audi stealthily tests RS4 Avant

With S3s, R8s and RS7s aplenty, Audi offers no shortage of performance models in North America. But one of our favorites is always kept just out of arm's reach. That of course is the RS4 Avant, and here we see Audi Quattro GmbH testing the latest version. Though it may look like a plain old S4 – and even wear S4 badges – the wider fenders and bigger wheels suggest that this is in fact a prototype for the upcoming RS4 Avant. For those unfamiliar, that nameplate connotes the best of all worlds within the A4 range: maximum power, maximum traction, and maximum luggage space. All the ingredients, in short, to make us wonder why anyone would rather drive a crossover. After the first-gen RS4 employed a twin-turbo V6, the subsequent two generations went with a 4.2-liter V8. This model, however, could adopt an electric turbocharger setup to give it all the power it needs (and then some) with a new form of hybrid setup that will soon be spreading across the industry. The bigger question on our mind, of course, is whether the new performance wagon will make the transatlantic voyage to North American showrooms. We're holding out hope that Ingolstadt may make a real run down American roads at the likes of the Mercedes-AMG C63 and BMW M3. Whether it brings the wagon body-style along with it is another matter entirely, but we can always dream. Related Video:

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.

The Audi RS5 takes aim at the BMW M4 and Mercedes-AMG C63

The current generation of the Audi A5 has soldiered on for the past 10 years, an eon when it comes to automobiles. Though we've seen and driven its replacement, the new car hasn't quite made it to market. As with most of Audi's lineup, the car is expected to come in three versions. While the full reveal and first drive reviews of the A5 and S5 took place late year, until now we haven't had a peek at the range topper Audi RS5. It sits on Audi's B9 platform shared with the Audi A4 sedan. Essentially, it's Audi's equivalent to the BMW 4 Series or the Mercedes-Benz C-Class coupe. In the case of the RS5, compare it to the BMW M4 and the Mercedes-AMG C63. Like its rivals, the RS5 sits longer, lower, and wider than its sedan stablemate. The RS features aggressive front and rear fascias and a set of unique wheels. While the styling of the new model may look evolutionary, it is indeed all-new inside and out. The two cars in these photos are wrapped in camouflage that covers everything below the beltline. The general shape of the bodywork looks the same, but the front and rear are slightly restyled. The front now has larger air intakes in the corners and a lower chin spoiler. Out back, the dual single-exit exhaust pipes give the RS model away. The S5, like all S models, features quad exhaust tips. The rear bumper is slightly modified, but all in all it's not far off from the A5 and S5 models. Audi's styling is always conservative, so this should come as no surprise. There's no word as to what's resting under the hood, but look for forced induction and six cylinders, possibly pulling something from the Porsche Panamera. As with every other Audi performance car, power will be sent to all four wheels through the latest generation of the Quattro all-wheel drive system. Look for a full reveal in the next few months, possibly as soon as March at the Geneva Motor Show. Related Video: