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Audi kills off its 420-hp four-cylinder engine project

Audi's supercar-slapping, fire-breathing four-cylinder concept engine will remain just that, with Autoblog confirming that it has been internally killed off. Speaking at the launch of the TT RS, the engineering boss of Audi's Quattro GmbH division, Stephan Reil, said the Volkswagen Group had stopped all development of the 420-horsepower, 2.0-liter four it showed in the 2014 TT Quattro Sport Concept car (above). Despite previous assurances that Quattro had roles for both the EA888-based engine and Audi's wildly charismatic 2.5-liter, five-cylinder motor, post-Dieselgate reality has killed the smaller engine. "The 400-horsepower EA888 engine is dead," Reil said. The EA888 engine was conceived and developed by the same man behind AMG's powerhouse 2.0-liter four. Friedrich Eichler left AMG to become the Volkswagen Group's gasoline engine development go-to guy, and he was confident the 420-hp engine could be turned into a production car quickly, as was then-Audi development boss, Ulrich Hackenberg. It was even suggested that because the EA888 engine family bolted straight into the Volkswagen Group's ubiquitous MQB small-car architecture, the little powerhouse could be cheaply and quickly dropped into any of the company's cars that needed an image boost. Since then, Quattro has elevated the five-cylinder motor, switching it to an all-alloy block with a magnesium oil pan to cut down its weight while boosting its power and torque levels. Where the four-cylinder engine was shown with 420 hp and 332 lb-ft of torque, the production version of the TT RS's new five-cylinder engine totes 400 hp and 354 pound-feet of torque. The smaller engine's proponents claimed a 0-62 mph acceleration figure of just 3.7 seconds for the concept TT that carried it, and it might not be a coincidence that the all-new TT RS claims exactly the same figure. The 2.0-liter motor had a torque peak that arrived at 2,400 rpm and began to taper off at 6,300 rpm, while its power apexed at 6,700 rpm, thanks in part to a turbocharger that could feed it up to 1.8 bar of air. Flip to the TT RS' data and you're looking at more torque at lower revs and a touch less power, but at higher revs. That's not a lot of wriggle room for the concept engine to operate, especially when the perceived value of the five-cylinder engine is higher than the four, and the four's development and production costs would be higher than the five's.

2016 Audi R18 whooshes around Sebring to test for WEC

The 2016 Audi R18 is a radically different endurance racer than the model it replaces. The designers drape the chassis in an angular body rather than the previous curves, and the engineers added lithium-ion batteries for energy storage. Now, we get to see these big changes in motion thanks to a video of the new car testing at Sebring. Like previous iterations of Audi's diesel-fueled racers, the latest R18 is quiet around the track. It seems to sneak up on corners with just a whoosh and a whir from the powertrain. The updated design also looks a lot better in motion than in static photos. Audi had a rough time in the 2015 FIA World Endurance Championship after losing to rival Porsche both at Le Mans during the summer and in the manufacturers' standings at the end of the year. Related Video:

German prosecutors investigating Audi for emissions scandal

After weeks of investigation into Volkswagen by prosecutors in Braunschweig, Germany, attorneys in Ingolstadt will also begin an examination into Audi's potential role in the emissions scandal. They reportedly received multiple criminal complaints that requested an inquiry, including one from Audi, according to Bloomberg. The prosecutors in Ingolstadt want to focus on people within the automaker that are responsible for emissions. However, the investigation is still too early in the process to identify any specific suspects. The German lawyers might also eventually combine their cases, but they remain separate for now. "Braunschweig took those parts that are clearly located at Volkswagen and asked us to keep the elements limited to Audi," a spokesperson for the Ingolstadt attorneys told Bloomberg. Audi has 2.1 million vehicles worldwide with Volkswagen Group's emissions-cheating four-cylinder diesel, including an estimated 13,000-14,000 of them in the US. The Environmental Protection Agency also recently filed a second violation notice against the 3.0-liter TDI V6 that was used in several of the company's models here, and the automaker responded with a stop sale for them. VW Group's carbon-dioxide emissions cheating in Europe also reportedly involves some Audi models. In that case, engineers admitted to artificially improving test results to achieve the cuts that the automaker requested.