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Audi unveils A3 Sportback G-Tron with bi-fuel power, 808-mile range

By this time next year, the Audi A3 Sportback will be offered with a variety fuel-efficient powertrains ranging from diesel to the all-electric E-Tron, but perhaps the most interesting is the all-new G-Tron model, which uses Audi's innovative carbon-natural compressed natural gas called e-gas. Previously called A3 TCNG, we first heard about this technology last year, but now Audi has confirmed that this low-emission, sustainable-fuel will debut by the end of this year on the A3 Sportback G-Tron.
To create this e-gas, a plant in Werlte, Germany uses electricity to split water into hydrogen and oxygen. As hydrogen fuel cell vehicles become more popular, Audi says that this process could also be used to produce hydrogen fuel, but to create CNG, it mixes the hydrogen with carbon dioxide to create "synthetic methane." Since it is identical to the CNG available today, Audi's e-gas can be shipped and stored using the existing CNG infrastructure. Making the whole process even greener, Audi obtains the CO2 for this process from a nearby biogas plant, which would otherwise be released into the atmosphere.
Differentiated from the regular versions of the A3, the G-Tron features a pair of tanks under the rear cargo floor holding 15.43 pounds of CNG, which can power the car for almost 250 miles. What's more, the A3's conventional gasoline tank is still in place, giving the car an addition 560 miles of range. In total, that means the A3 G-Tron has a driving range of more than 800 miles. To run on both CNG and gas, Audi made changes to the car's 1.4-liter four-cylinder engine (including the turbo, cylinder head and fuel injection system) and catalytic converter.

A few pre-race notes and a lot of photos from the 24 Hours of Le Mans

The 82nd running of the 24 Hours of Le Mans is on.
Audi has won 12 of the last 15 events, the scion of Auto Union is trying to make it 13 this year. To do so, it will have to overcome a situation faced only three other times during its dominance of La Sarthe: underdog status. Toyota has won the first two races of the year and claimed pole for this race, the rumor being that this year it's Toyota's race to lose.
And then there's Porsche. It's been 16 years since the Stuttgart brand raced on the top rung at Le Mans, three years years since it announced its return, just a year since it acquired Mark Webber in a signing that wasn't subtle and a few months since we got eyes on the 919 Hybrid.

Audi SQ7 spied for the first time

Audi isn't really hiding that its engineers are hard at work on a high-performance version of the latest Q7. However, we haven't seen any of the fruits of this labor, until we got these fresh spy shots of the SQ7. With seemingly no camouflage on the car, these photos might give a very good idea of what to expect from Audi's speedy SUV. One big tip-off of the model's performance aspirations is the redesign of the front end's lower portion. New ducts beside the foglights send cool air to what appear to be intercoolers. This test model rides on a very cool-looking set of basket-weave style wheels, and the big, cross-drilled brakes are easy to spot behind them. At the rear, the quad exhaust tips also signal something special. Our spies also snapped some shots of the interior. If there is any question about whether this is the SQ7, these photos certainly assuage it. The badging is plain as day on the gauges, but at this point the changes appear to be fairly minimal beyond that. We know the SQ7 is going to get more power, but the method isn't officially confirmed yet. Although, Audi technical boss Dr. Ulrich Hackenberg said bluntly last year that it would use an electrically turbocharged engine, possibly an evolution of the V6 diesel in the RS5 TDI Concept. Hackenberg also suggested that the SQ7 would go on sale in 2016. Though, the actual debut might come earlier. Regardless, the tweaks should make the SUV quite a performer. Even on the standard version, it weighs 700 pounds less than the previous generation, while remaining about the same size.