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Autoblog senior editor Greg Migliore gives the highlights from the week in automotive news.

166 MPGe diesel-electric Audi Q7 E-Tron Quattro gets real in Geneva

Despite some warnings that plug-in vehicles would not make a big impression in Geneva this year, the first big reveals from the Peace Capital are indeed PHEVs. For example, the diesel-electric Audi Q7 E-Tron Quattro, which right out of the gate comes at us with some impressive numbers: an all-electric range of 34 miles and the "potential" to hit 166 miles per gallon equivalent. Whatever scale Audi is rating the new Q7 PHEV on, 166 MPGe is a resounding success. As we might guess from the prototypes we've seen and hints we've had, the Q7 E-Tron Quattro is not some auto salon fantasy. The vehicle will go on sale at the end of this year, in the UK, at least. Availability in the rest of Europe and here in the US is likely but unspecified in the press materials we've seen so far. The real-world reality of the Q7 E-Tron Quattro means that specs like a 0-100 kilometers an hour (62 miles per hour) time of six seconds and a top speed of 225 kmh (139.8 mph), CO2 emissions of under 50 grams per kilometer and a total system torque output of 516.3 pound-feet should be ours to test in the not-too-distant future. This whole E-Tron program is turning out to be quite something. Who else is ready? Related Video: AUDI Q7 ENTERS THE VOLT AGE IN GENEVA WITH NEW SUB 50 G/KM Q7 E-TRON QUATTRO 02/03/15 Commanding new Q7 incorporates hybrid drive for a combined 876-mile range and 166mpg potential First diesel plug-in hybrid with quattro drive in its segment First ever plug-in hybrid TDI from Audi Six-cylinder TDI engine develops 373 PS Electric-only range of up to 34 miles, increasing to 876 miles combined Fully charged in two and half hours Maximum efficiency with hybrid management UK ordering expected to open at the end of 2015 Ingolstadt/Geneva, March 2, 2015 - Audi has combined its world renowned diesel engine expertise with its equally widely acclaimed flair for technological innovation to create its first TDI plug-in hybrid with quattro all-wheel drive. Making its world public debut at the Geneva Motor Show, the new Q7 e-tron quattro combines a frugal TDI engine with lithium-ion battery technology for a potential range of up to 876 miles and the ability to travel emission-free for over 34 miles on electric power alone, contributing to an official CO2 figure of less than 50 grams per kilometre. The Q7 e-tron quattro is the second Audi model with a powerful plug-in hybrid drive system.

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.