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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 RS4 Avant Nogaro Selection puts a fresh face on old memories

I've been fortunate enough to drive plenty of memorable cars over the years, and one of my all-time favorites is the Audi RS4 sedan. It was only sold in the United States for a short time, but during that quick run, it made a huge impression on me. I remember everything about that car - the smell, the sound, the exact feeling of the manual shifter as it clicked between the six gears, and the texture of the steering wheel that I so happily tossed about. In fact, whenever I'm feeling nostalgic, I go back and watch this video of the late David E. Davis, Jr., running the California Mille roads in a Sprint Blue RS4 - a video we shot for Winding Road many years ago during my tenure as an editor there.
So even though the Audi RS4 Avant Nogaro that debuts here in Geneva isn't super important, especially for our American-centric audience, I feel compelled to write about it. No, we don't get the lovely RS4 in the States anymore, but the package offered in Europe is just as sweet as ever - perhaps even more so, what with that stylish longroof shape. Under the hood is Audi's excellent, naturally aspirated 4.2-liter V8 engine, tuned to deliver 450 horsepower and 317 pound-feet of torque, allowing for a 0-62 sprint of 4.7 seconds.
The Nogaro name refers to the special blue paint - a throwback to the original Audi RS2 Avant that kicked off the company's super sweet luxury offerings. Other unique features for the Nogaro car include gloss black exhaust outlets, window frames and grille surround, as well as matte black roof rails. Special 20-inch wheels round off the exterior enhancements, and inside, Nogaro Blue Alcantara accents can be had on the door panels and seat inners.

Next-gen Audi R8 E-Tron could have 280-mile range

Will the next hypermiling contest take place between the latest iteration of the Audi R8 E-Tron and a Tesla Model S. On paper, the single-charge range between the high- and higher-end EVs are nearly identical, so it's possible. But what fun would that be, using light pedal foot and all? Audi has released the latest specs for the R8 E-Tron, and they are just beastly. The EV will deliver 456 horsepower, have 679 pound-feet of torque and will be able to jet from 0 to 60 miles per hour in less than four seconds. More stunningly, the car will have a single-charge range of 280 miles, which is about 15 miles longer than the Model S's range. Audi says the new, long-distance pack is due to " new battery cells," but declined to go into detail. Despite the excellent numbers, not everyone thinks a new R8 E-Tron poses any threat to Tesla. Prices for the "base" version of the R8 with a gas-powered V10 engine start at 165,000 euros ($185,000), and there's no guessing yet what an EV version will cost. Whatever it is, the car's been markedly improved compared to the earlier iterations. We reported on progress of the new R8 E-Tron about a year ago that the single-charge range would climb to about 250 miles, and that the mill would deliver about 376 horsepower. Audi first showed off a concept version of the car at 2009's Frankfurt Auto Show, saying at the time that the model had a single-charge range of about 150 miles. So this is good progress. Check out Audi's rather lengthy press release below. Audi presents the new R8: The sporty spearhead just got even sharper The second generation of the high-performance sports car makes its debut in Geneva 5.2 FSI engine with up to 449 kW (610 hp), 0 to 100 km/h (62.1 mph) in 3.2 seconds New multimaterial Audi Space Frame with high proportions of aluminum and CFRP No model with the four rings is closer to motorsport, none is more striking and more dynamic: at the Geneva Motor Show, Audi is presenting the second generation of its high-performance R8 sports car. The V10 mid-engine and a newly developed quattro drive ensure breathtaking driving performance, especially in the top-of-the-range version with 449 kW (610 hp): achieving 0 to 100 km/h (62.1 mph) in just 3.2 seconds, its top speed is 330 km/h (205.1 mph).