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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?

Refreshed 2015 Audi A8 starts at $77,400*

Audi definitely made the US wait for the refreshed 2015 A8 and S8. The updated models were first unveiled last summer, but it has taken until June for the revised flagship sedan to reach dealers here.
The refreshed A8 line doesn't come cheap, though. Prices are up $2,000 or more over the 2014 model year. The basic 3.0T model goes for $77,400 or $81,400 for the long wheelbase version. The long wheelbase TDI is $85,100. The standard 4.0T model asks $86,400 or $90,400 for the longer one. An S8 sets back buyers $114,900, and the full bore A8L W12 is $137,900. All of these prices exclude destination (which was $895 last year and now stands at $925, according to Audi representative Mark Dahncke).
To make the wait worth it, Audi is packing the sedan with new technology and given it the slightest restyle. All models of the luxurious vehicle now come standard with full LED headlights. The 2015 model also benefits from electromechanical steering, available variable ratio steering and active lane assist. The night vision system is also updated to detect animals and alert the driver. Mechanically, there are some tiny tweaks as well. The 4.0T V8 is boosted to 435 horsepower, compared to 420 hp previously, and the 6.3-liter W12 now has cylinder deactivation.

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.