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Audi celebrates diesel milestone with triple-charged RS5 TDI concept

Diesels are typically slower than their gasoline counterparts, but leave it to Audi to turn that notion on its head. After dominating Le Mans and the international endurance racing scene under diesel power for the better part of a decade, the German automaker toyed with the idea of an oil-burning R8 for the road and ultimately made its first performance crossover a diesel. It's made the letters TDI a battle cry, and now it's yelling even louder with the RS5 TDI concept.
Set to be unveiled in a couple of days at the Leipzig Auto Show to celebrate 25 years of the TDI engine, the concept ditches the gasoline-burning 4.2-liter V8 in the production RS5 in favor of a 3.0-liter V6 twin-turbo-diesel with an electric supercharger added on to combat turbo lag. Output comes in at 385 horsepower and 553 pound-feet of torque, which means that while it has 65 fewer horses than the gasoline model, it packs a staggering 236 lb-ft more torque.
The result of the triple-charged madness is a 0-62 time around four seconds flat, trumping the 4.6 seconds for the road-going model. Top speed, of course, is electronically limited to 155 miles per hour, which is a bit of a shame because we bet it'd be a kick to pass a Porsche on the Autobahn in a diesel, now wouldn't it?

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.

Audi Nanuk Concept likes Parcour, puts four rings on it

Without a doubt, one of the coolest (and weirdest) debuts from this year's Geneva Motor Show had to be the Italdesign Giugiaro Parcour concept. And ever since the off-road performance coupe with Lamborgini guts made its debut, we've sort of been smitten with it. We figured this neat two-door would be a one-and-done show car, but to our delight, the folks at Italdesign worked with Audi to create this, the Nanuk Quattro Concept, which makes its debut here at the 2013 Frankfurt Motor Show.
Unlike the original Parcour, the Nanuk ditches the high-revving Lambo-sourced 5.2-liter V10 in favor of a twin-turbocharged 5.0-liter diesel V10. That's a beast of an engine, and with 544 horsepower and 738 pound-feet of torque on hand, it means the 4,189-pound, all-wheel-drive Audi can scoot to 62 miles per hour in under four seconds. Of course, being a diesel, it's surprisingly efficient, and we're told the Nanuk can achieve up to 30 miles per gallon.
As much as we sort of hate the term, the Audi Nanuk is a proper coupe-crossover if we've ever seen one, and utilizes the automaker's next-generation adaptive air suspension (the Parcour had a different pushrod arrangement) that offers a range of almost three inches of height adjustment. There's also an integral steering setup, meaning the rear wheels can turn up to nine degrees in the opposite direction of the front rollers, improving maneuverability.