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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.

Is Audi readying hardcore final edition R8?

The days may be numbered on the current Audi R8, but if our latest round of spy photos is any indication, Audi's first supercar is going to go out with a bang. This camo'd tester was spotted parked somewhere in Europe, and if doesn't at least belie a faster R8, it certainly indicates that a more aerodynamically intense model is coming.
The tall rear wing is the most obvious aerodynamic change. It's joined out back by a none-too-subtle diffuser and the cannon-like exhausts of the R8 V10 Plus, while the front and side of this particular R8 are home to new side sills and winglets on the lower front fascia.
We'll be keeping our ears to the ground for any more on what looks to be another variation of first-generation Audi supercar. Until then, let us know what you think this car may foreshadow. A new halo model? A gentleman racer? Have your say below.

Don't buy that crossover! Buy a cladded wagon instead!

If you're looking to buy a car soon, and you're like most Americans, there's a strong chance you're considering buying a crossover SUV. That's what people want nowadays. People like the tough, tall exterior that suggests adventure and preparedness, they like the high seating position, they like the all wheel drive many have and they like the practicality. Because of this, crossovers have rapidly supplanted typical cars such as sedans, wagons, and more as the most popular vehicles in the country. But they're compromised, too. They're often heavy, thirsty, and expensive compared with more conventional cars. The good news is, there's an alternative, a happy medium between the straight crossover and the traditional car. They're lifted wagons, and they're the best crossover SUVs around. And for those who may not know what we're talking about, we're talking about cars and wagons that have been given a suspension lift for more ground clearance and a higher ride height, and often have all wheel drive standard or optional. They also usually have chunky plastic body cladding to make them look tough and durable. Examples include the Subaru Crosstrek, Audi A4 Allroad, Buick Regal TourX, and Volkswagen Golf Alltrack, among others. Because of the suspension and body modifications, these vehicles fit the trendy crossover mold quite well. And in the case of long-running nameplates such as the Subaru Outback and Volvo Cross Country models, they even have some heritage as outdoorsy machines. They also provide the higher driving position that crossover buyers love. And in some cases, such as with the Golf Alltrack, we've learned they offer better ride quality than their road-oriented siblings. View 9 Photos So these tall wagons offer the key things crossover buyers want, but what makes them better than traditional crossovers is that they have the advantages of the cars they're based on. For instance, the aforementioned Golf Alltrack still drives mostly like a Golf, which is to say, it's nimble, feels peppy, and is easy to maneuver because of its relatively small size. We can't really say the same for the Tiguan, which feels generally more sluggish and uninteresting than the Alltrack. And we mention Volkswagen's compact crossover because it starts at nearly the same price as the Alltrack. Some of the difference in giddy-up can be explained by weight. Normal crossovers can be fairly portly, while these lifted wagons are notably lighter.