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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.

Is the Audi R8 E-Tron project back on again?

If you ask Audi about its R8 E-Tron prototype, the all-electric two-seater that was first shown at the 2009 Frankfurt Motor Show, the automaker will tell you that its development program is on hold. Yet, as we reported in January, limited production of the combustion-free coupe may be moving forward... information still officially unconfirmed by the automaker.
New images of the electrified R8 undergoing winter testing in Europe have emerged (above and in our gallery), and the car has been spotted running in Spain as well. Both sightings support reports that the E-Tron, with its 150-mile battery range and 8:09 Nürburgring time, may be back in business. Does the program have a green light, or is Audi merely trying to take some of the thunder from the BMW i8?
Whatever the case, if the R8 E-Tron does eventually make it into showrooms - and we are now led to believe it will - expect production volume to be very low. Assuming it doesn't get shelved again, of course.

2017 Audi R8 First Drive

You might think the new Audi R8 is a Lamborghini in a business suit. You'd be wrong; the Huracan is an R8 in a Heinlein shock trooper suit. This is the most raucous, rowdy Audi yet, and it's most certainly a supercar – even when parked next to its bawdier Italian cousin. Although the Huracan has been on the street for nearly a year now, the new R8 and the Lambo were developed in parallel. Audi handled most of the engineering workload, with the Huracan receiving Lamborghini's styling and tuning finesse on top of its Audi-built V10 engine and seven-speed dual-clutch transmission. The R8 gets Audi's motorsports-inspired best. Tally it all up and you have two very different cars built from very similar components. Of course, that could also be said of the R8 and its racing doppelganger, the R8 LMS, the racecar built for WEC endurance racing. That car, in fact, is more closely related to the R8 than is the road-going Huracan – the wheelbases are the same, 50 percent of the parts are shared, and the bodies-in-white are built on the same line. The racecars are pulled off line for occasional tweaks or additions, then slotted back in to run through most of the same workflow as the R8s that will eventually end up on the streets. Like a new pair of your favorite shoes, the new R8 is familiar and foreign at the same time. This development program pulls from the best of a legendary supercar brand's flair for presence and idiosyncrasy. It also takes lessons from the company's customer racing effort, as well as Audi's own impeccable taste in road manners and clean, elegant design. The end result is an inspired supercar with daily-driver comfort and a surprisingly aggressive side. Like a new pair of your favorite shoes, the new R8 is familiar and foreign at the same time. It's more comfortable and compliant on the street, thanks to a new chassis that's 40 percent stiffer, allowing for a more forgiving suspension tune. The completely reworked 5.2-liter V10 engine has a Great White bite to go with its Rottweiler bark, but only after you provoke it from polite mode with a press of either the Drive Select button or the exhaust sound switch. The seats are comfortable – that can be said for both the standard sport seats or optional carbon-shell, race-style buckets. Wrapped in a cabin that's much more futuristic and forward-looking than the last R8, the overall driving experience is refined, luxurious, and high-tech.