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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.

Audi says new 48 volt micro-hybrid system improves fuel economy, paves way for electrification

Most cars use a 12-volt system to power their electrical components. But, with more and more electric bits and bobs being added to new vehicles, a dozen volts is looking a bit weak these days. In fact, Audi says that standard 12-volt systems are being stretched "to their very limits." Enter 48 volts. If used in a car that gets 40 mpg, that would translate to around 43.5 mpg. Audi is testing a supplemental 48-volt electric system in two prototype vehicles – modified mild-hybrid versions of the A6 TDI and the RS 5 TDI – in order to add in more electric technology (an electric compressor, for example, to improve acceleration) and "convenience systems for dynamic chassis control." Audi says it has more applications in the pipeline, but the overall gist is that the German automaker sees 48 volts as an "important building block in electrification strategy." As you can see in the picture above (click to enlarge), the RS 5 TDI concept uses a li-ion battery installed in the back of the car and an alternator to provide 48 volts when the engine is off. Audi says that the 48-volt system can save up to 0.4 liters of fuel per 100 kilometers. To put that into US numbers, if used in a car that gets 40 miles per gallon today, that would translate into a bump up to around 43.5 mpg. The Advanced Lead Acid Battery Consortium (ALABC) is also working on a 48-volt system to improve fuel economy and we've got a deep dive of Audi's electric turbocharger here. Even more powerful and efficient – the new 48-volt technology from Audi Important building block in electrification strategy More voltage and more power for new technologies Scalable platform concept suitable for wide-ranging uses Ingolstadt, August 25, 2014 – Audi is to upgrade part of its vehicle electrical system from twelve to 48 volts. The move represents another technical building block for facilitating the integration of new automotive technologies while increasing the power and efficiency of its cars. "We are using the full bandwidth of electrification in our drive principles strategy. Running part of the vehicle electrical system at 48 volts plays a central role in this," commented Prof. Dr. Ulrich Hackenberg, Member of the Board of Management for Technical Development at Audi. "It enables us to make more energy available.

Audi + Airbnb: What it's like to live in a car commercial

Miles from civilization, in a lonely stretch of Death Valley, lies an unlikely sight: a sleek contemporary home – all glass, concrete, and metal – and a pair of equally modern 2017 Audi R8 V10 Plus coupes. You might have seen the combo in a TV commercial that ran during the Emmys, a spot that had us asking an obvious question: What are these objects doing together, smack in the middle of nowhere? Audi partnered with Airbnb to offer the home and the cars to seven guests. Somehow, we became lucky number eight. The spot, entitled "Desolation," promotes the carmaker's flagship alongside what ended up being an extreme rental property. The idea to build the three-bedroom, 1,200-square-foot house came from Italian writer and author Fabrizio Rondolino, who was long smitten with American desert. The home was built in 2010 using prefabricated construction by San Francisco-based architecture firm nottoscale. It's a spare elevated structure, with floor-to-ceiling windows cinematically framing the sky. To set the four-wheeled mood, images of the R8 sit where family photos would go, and a laser-cut aluminum sign over the entrance announces it as the "Home of the R8." In acknowledgement of the remoteness, a satellite phone sits charged up with clearly printed dialing instructions. An Easter egg from the ad – two jars of Leadfoot Coffee – hides in plain sight on the kitchen counter. You can rent houses like this elsewhere on Airbnb, but here's where gearheads start paying attention: The two Audi supercars counter the architectural tranquility with a combined 1,220 horsepower and an opportunity to rip through the desert at obscene speeds (not to mention several other extras you don't get with a standard vacation rental; more on that later). Seven three-day/two-night stays were offered through an extremely limited Airbnb listing. The buzz surrounding the campaign was so strong that the place booked up in less than six seconds. For what you get, this was a steal. The per-night price of $610 – a reference to the V10's horsepower figure – wouldn't begin to cover the behind-the-scenes logistics needed to coordinate and execute this marketing exercise. I was the sole member of the media invited to experience the Audi Airbnb and got to spend a weekend in this desert playground to see what it was all about. My weekend began when an Audi rep met me and my family at Las Vegas International Airport following a quick flight from Burbank, California.