2005.5 B7 Audi S4 Avant Wagon 4.2l V8 Navigation, Premium, Cold Weather Packages on 2040-cars

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Audi stealthily tests RS4 Avant

With S3s, R8s and RS7s aplenty, Audi offers no shortage of performance models in North America. But one of our favorites is always kept just out of arm's reach. That of course is the RS4 Avant, and here we see Audi Quattro GmbH testing the latest version. Though it may look like a plain old S4 – and even wear S4 badges – the wider fenders and bigger wheels suggest that this is in fact a prototype for the upcoming RS4 Avant. For those unfamiliar, that nameplate connotes the best of all worlds within the A4 range: maximum power, maximum traction, and maximum luggage space. All the ingredients, in short, to make us wonder why anyone would rather drive a crossover. After the first-gen RS4 employed a twin-turbo V6, the subsequent two generations went with a 4.2-liter V8. This model, however, could adopt an electric turbocharger setup to give it all the power it needs (and then some) with a new form of hybrid setup that will soon be spreading across the industry. The bigger question on our mind, of course, is whether the new performance wagon will make the transatlantic voyage to North American showrooms. We're holding out hope that Ingolstadt may make a real run down American roads at the likes of the Mercedes-AMG C63 and BMW M3. Whether it brings the wagon body-style along with it is another matter entirely, but we can always dream. Related Video:

2014 Audi R8 GT zooming toward Le Mans reveal

According to a report from Autocar in the UK, the Audi R8 is set to get something of a swan song for its own going-away party in the form of an updated GT model for the 2014 model year. If Autocar is right, this even higher-performance Audi R8 will debut at the upcoming 24 Hours of Le Mans race in France.
The 2014 Audi R8 GT Plus will reportedly get a tuned version of the much-loved 5.2-liter V10 engine that Audi has used to good effect in past R8 models. A six-speed manual or seven-speed dual-clutch automatic would send power to the rear wheels, enabling a 3.4-second 0-62 mile per hour run and a top speed of 199 mph.
Judging from spy shots that we've already seen (reprised above), the new GT Plus will be fitted with an aggressive body kit that includes a massive rear wing, a more prominent front splitter and enlarged side blade ducts. A Spyder version of the GT Plus may be on tap for 2015. Pricing, obviously, is unknown, as is any potential launch date. In other words... stay tuned.

Audi creates new diesel fuel from carbon dioxide and water

What if you could power cars of the future with pollution created by the cars of the past? That's what German automaker Audi is hoping to achieve by creating a new synthetic fuel using renewable energy to turn water and carbon dioxide gas into a new kind of fuel they call "e-diesel." The new diesel is being produced at Audi's pilot plant Sunfire in Dresden, Germany. Only a few gallons were created, which the German Federal Minister of Education and Research Johanna Wanka put into her Audi A8 to prove the fuel's bonafides. The base fuel is known as "blue crude" and begins from a green source. Audi uses electricity from wind, water or solar power sources to separate hydrogen from oxygen in water. The hydrogen is then mixed with carbon dioxide which has been converted in carbon oxide. The blue crude is then further refined to create the e-diesel. The carbon dioxide is currently supplied by a biogas facilities, but some of that CO2 was captured from the air. "The engine runs quieter and fewer pollutants are being created," says Sunfire CTO Christian von Olshausen. The fuel can be combined with conventional diesel fuel, as biodiesel fuels already and would be competitively priced against regular diesel, according to Gizmag. Sunfire can produce about 42 gallons of e-diesel a day. That seems like barely a drop in the bucket in terms of Europe's energy use, but Audi is ready to commercialize the technology with plans to expand production with a bigger facility in the future.