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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 details updated 3.0L V6 TDI engine

The brands in the Volkswagen Group have shown that they can develop some of the world's best diesel engines for passenger cars. At the Vienna Motor Symposium taking place May 8 and 9, Audi has an updated one to add to its lineup. It's launching a new version of the 3.0 TDI V6 with better efficiency and more power than the version currently in the US.
The new diesel will be offered in two tunes: 215 horsepower or 268 hp. However, Audi isn't giving away all of the new engine's secrets just yet. It says "depending on model" the mill makes as much as 442.5 pound-feet of torque and gets as much as 13 percent better fuel economy. That likely means the more powerful version gets the twist, and the other one has the better consumption, but we'll have to see.
To compare, the current 3.0 TDI offered in the US produces 240 hp and 428 lb-ft of torque. In the A6, it's rated at 24 miles per gallon city, 38 mpg highway and 29 mpg combined, according to the EPA.

Audi E-Tron vs. Jaguar I-Pace and Tesla Model X: How they compare on paper

The all-electric crossover segment is suddenly heating up. Tesla was first to market with its Model X, and the California-based automaker has a several-year head start on the rest of the field. But now it has competition, with the Jaguar I-Pace already hitting dealerships across the globe and the just-announced Audi E-Tron hot on their heels. We decided to see how Audi's new entrant compares with its British and American rivals, so we downloaded their spec sheets (at least those that are available) and dumped them all into the spreadsheet you see below. As you'll soon find out, there are lots of similarities between these three electric crossovers, but each has a unique selling point or two with which to entice buyers. View 24 Photos Performance Note that we're using the Tesla Model X 75D for this comparison, since that's the model that is closest in price to the Jaguar and Audi entries. If you really want the fastest and most powerful electric CUV available, you're going to want to look at Tesla's ludicrous P100D model, but you'd better be willing to just about double the price you see in the chart above. With that out of the way, these particular electric crossovers are all pretty quick. The Jaguar boasts the quickest 0-60 time, but in the real world, that half-second advantage over the 75D won't amount to much. The Audi is a full second behind the Jaguar, and a little over a half second slower to 60 than the Tesla. A 5.5-second 0-60 time, though, still means the E-Tron will be able to squirt away from traffic lights quicker than the rest of the morning commuters. As far as battery capacity, Audi leads the way with 95 kWh, which is 5 more than the Jag and a whopping 20 more than the Tesla. Until we get estimated range figures, though, we won't know what the extra capacity means in the real world. In other words, stay tuned. View 74 Photos Exterior and interior dimensions The Jaguar is the smallest of these three 'utes, inside and out. The Tesla Model X is the largest. Does that make the Audi just right? Maybe, but only if you don't need a third row — the Model X is the only one of this trio that offers seating for six or seven passengers (depending on whether the buyer opts for a second-row bench or individual chairs). A smaller size may be a boon for drivers who often have to fit into tight spaces, but those slinky dimensions mean the Jaguar's cargo capacity is well behind that of the Audi and not even close to the cavernous Tesla. Tesla Motors Inc.