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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.

Consumer Reports selling its road-tested roadsters [w/video]

Here's a chance to acquire a celebrity-owned vehicles, and this time at a discount instead of a premium. So the celebrity in this case is Consumer Reports, that magazine that could be equally adored and abhored by car enthusiasts. CR buys all of its test vehicles and usually finds willing second owners within its own ranks, but its opening its small used-car lot to the public. On the forecourt are four roadsters: an automatic 2012 Audi TT 2.0 TFSI Quattro S-Tronic with 6,600 miles for $36,500, a manual 2012 BMW Z4 sDrive28i with 8,400 miles for $45,000, a manual 2012 Mercedes-Benz SLK250 for $39,500 and a manual 2013 Porsche Boxster with 7,000 miles for $48,000.
Those numbers mean a savings of $9,000 to $10,000 before haggling - each car is listed with an "Asking price" so there could be some wiggle room if you show up with pockets full of dough and eyes full of serious intent. Since the money CR earns from the sales go back into the magazine's budget to buy more test cars, however, it probably won't take any oddball trades, so you can forget about getting any purchasing help from that track-day AMC Javelin project on blocks in the back yard.
The vehicles have been taken care of and spiffed up for sale; buyers will take delivery at the CR test track in East Haddam, Connecticut and get a tour of the facilities. While you're there they'll even take you on a lap around the track so you can feel how your car handles when driven by one of its testers. They will probably not help you with advice on which toaster and dehumidifier to buy - you'll still need to get a subscription for that. Have a look at the video below to see a day in the life of a CR test car.

2016 Audi RS7 Performance is an LA beauty in blue

The whole point of the new 2016 Audi RS7 Performance is directly in its name, and the Four Rings now claims 605 horsepower from its 4.0-liter twin turbo V8. For those keeping track of big-brother bragging rights, Audi claims 560 hp from the standard RS7. Plus, the engine's torque can jump from 516 pound-feet to 553 lb-ft during the temporary overboost function. An eight-speed automatic gearbox still sends power to the front and rear through the Quattro all-wheel drive system. The results of all these upgrades are a sprint to 60 miles per hour in 3.6 seconds and a top speed of 190 mph. The RS7 Performance is about more than just power; Audi also fits carbon ceramic brakes and an RS Sport Suspension with Dynamic Ride Control. The exterior also sees some minor tweaks that include a restyled rear diffuser, new 21-inch wheels, black tailpipes, and a gloss black grille. RS sport seats come standard inside. The RS7 Performance arrives at Audi dealers in December and prices start at $129,925 (after $925 for destination). Get a good look at this very quick, fastback sedan in the gallery above. Related Video: Plus performance: the new Audi RS 6 Avant performance and RS 7 Sportback performance 4.0 TFSI now with 445 kW (605 hp) and up to 750 Nm (553.2 lb-ft) Like a supercar: from 0 to 100 km/h (62.1 mph) in 3.7 seconds New model designation hones brand's sporty profile Even more performance coupled with outstanding efficiency – that is what is behind the new "performance" model designation at Audi. The Audi RS 6 Avant performance* and Audi RS 7 Sportback performance* further hone the brand's sporty profile. Their 4.0 TFSI engine with 445 kW (605 hp) and up to 750 Nm (553.2 lb ft) of torque push acceleration (3.7 seconds) nearly to levels usually reserved for supercars. Fuel consumption remains unchanged at 9.6 and 9.5 liters per 100 kilometers (24.5 and 24.8 US mpg), respectively, corresponding to 223 and 221 g CO2 per km (358.9 and 355.7 g/mi). These are best-in-segment figures. The new Audi RS 6 Avant performance and the new Audi RS 7 Sportback performance offer more power output than ever before. The 4.0 TFSI now produces 445 kW (605 hp) and maximum torque of 700 Nm (516.3 lb-ft). A particular highlight of the engine is an overboost function allowing the driver to temporarily draw on up to 750 Nm (553.2 lb-ft).