Audi A4 Quattro Awd Leather Sunroof Heated Seats Sport Low Miles Low Buy It Now on 2040-cars

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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.

2014 Audi R8 V10 Plus

Ignore the naysayers who say the Audi R8 is too refined to be a proper supercar, or that it has begun to show its age - after a few tweaks for the 2014 model year, the automaker's flagship remains one of my favorite exotics.
Audi has treated all of its R8 models to a host of enhancements for the 2014 model year that include new LED headlights and tail lamps, larger steering wheel-mounted shift paddles, new exhaust finishes, updated alloy wheel designs and fresh exterior colors. However, the most significant news is the arrival of a proper seven-speed S-Tronic dual-clutch automatic transmission (it replaces the six-speed R-Tronic). The rapid-fire gearbox shaves a coupe tenths off the 0-60 sprint and improves fuel economy for both the eight- and ten-cylinder models (thankfully, a traditional six-speed manual is still on the order form).
I recently spent time with the new-for-2014 V10 Plus model, which is only available in a coupe body style. Compared to the standard V10 models, the Plus sheds upwards of 130 pounds thanks to lightweight manual seats (not fitted to my test car), carbon-ceramic brakes, reduced sound bay insulation, a smaller fuel tank and an assortment of carbon-fiber pieces (including side blades, front splitter, rear diffuser and spoiler). But that's not all, as the V10 Plus also receives a bump in output that pushes its ten-cylinder to an even 550 horsepower.

Autoblog Podcast #344

Doug DeMuro from Plays With Cars, Infiniti Q50, Subaru BRZ STI, Porsche Macan
Episode #344 of the Autoblog podcast is here, and this week, Dan Roth and Executive Editor Chris Paukert are joined by Doug DeMuro, author of Plays With Cars and prolific internet autowriting presence. Topics include the latest spy shots of the Porsche Macan, the 2014 Infiniti Q50, and the teaser images we've recently seen of a Subaru BRZ wearing STI badges. As always, we start with what's in the garage and finish up with some of your questions. For those of you who hung with us live on our UStream channel, thanks for taking the time. You can follow along after the jump with our Q&A. Thanks for listening!
Autoblog Podcast #344: