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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.

2017 Audi A5 First Drive

It might not look it, but behind the 2017 Audi A5's evolutionary styling update there's a new platform and a host of mechanical and technological upgrades that make it the most advanced offering in its class. We got to sample the new A5 on the windy roads outside of Porto, Portugal, which gave us an in-depth look at the car underneath the unremarkable exterior. The A5 may no longer be the haute couture choice in this segment Í­– that title goes to the Mercedes-Benz C-Class Coupe – but there isn't a bad line on the new car, and it's more creased and toned than before. Given the bulging hood and chunky C-pillar, we'd say its gym membership is paying off. This might look more like a mid-cycle update, but what's underneath is new: a scalable architecture known internally at VW Group as MLB Evo, an optional seven-speed dual-clutch gearbox, and the third-generation EA888 2.0-liter, four-cylinder turbocharged gasoline engine. This engine debuted in the A6 and is rated at 252 horsepower and 273 pound-feet of torque. That's a healthy 32 hp and 15 lb-ft more than the 2016 A5's 2.0-liter offered, and it showed on our spirited drive through Portugal's grape-growing region. A handful of A5s will leave the factory with six-speed manuals, but most buyers will find a new seven-speed dual-clutch transmission in place of last year's eight-speed conventional automatic. Audi worked hard to improve initial throttle response to eliminate the clunkiness endemic to torque-converter-free transmissions. In urban slogging, the gearbox does a very convincing impression of a traditional automatic. In sport mode, the transmission livens up and delivers the rapid-fire shifts we expect from this type of gearbox. We did not have the opportunity to sample the stick. Our test car had Audi's Euro-spec version of this engine, which utilizes both direct and port fuel injection. American models will forgo the latter. Brisk acceleration is matched by a subtle growl piped in from under the hood at higher rpm – about the only noise you'll hear. The A5 is astonishingly quiet. In fact, it was that quietness that encouraged us to leave the coupe in the Drive Select's comfort setting for much of our drive. Drive Select tweaks the car's steering, throttle response, and, on cars so equipped, the optional adaptive suspension. Truth be told, Comfort rides a little too plush and Dynamic a little too firm.

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.