2005 .5 Audi S4 Base Sedan 4-door 4.2l 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 S1 Quattro [w/video]

Audi may only now be fully committing to the US compact car market with a range of A3 models, but it's got far more small car expertise than most Americans realize, and its offerings get even tinier, too. Back in 2010, Audi leapt into the subcompact premium fray - in all markets but the United States, Canada and China - with its A1. The A1 family has sold all right, but not quite as well as was expected, likely due to its price when optioned up. (It also doesn't help that the Volkswagen Polo is a great car on the same architecture and costs much less.)
But Audi seems compelled to make high-buck S trims of everything nowadays, so right on schedule, I've scored seat time in its new S1 Quattro. Under its gumdrop-colored hood is the very popular 2.0-liter TFSI motor. In this trim, it's good for 228 horsepower and 273 pound-feet of torque between 1,600 and 3,000 rpm. That's quite a lot of gumption for this little blaster - enough power for 0-60 in just 5.7 seconds.
My drive was originally supposed happen on a sub-zero frozen lake in Sweden, only Audi forgot to call Mother Nature and ask her to hold off on springtime. It would have turned into a slush drive and then a submarine test had I been told to stick to the original plan, so it was dusty, soggy and gravel-y pavement instead, which turned out to be a better real-world test anyhow. Plus, the car got even cuter when it was filthy.

2013 Audi RS5 [w/video]

Enjoying The Romance, Not Yet Convinced About A Commitment
I imagine spending time with a sexy sports coupe is similar to a first date with a supermodel. Before she arrives, there's a buildup of excitement mixed with nervous anticipation. Even though the background work is done, there are many concerns and unanswered questions about how the two of you will get along. What about compatibility, engagement and dynamics?
The big day arrives, and you answer the door to find her waiting in the driveway wearing a form-fitting Misano Red Pearl dress and sleek Anthracite stilettos. As you shake your head in disbelief, you swear she just winked her... ah... xenon headlight at you.