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Hackenberg says next Audi A4 set for Frankfurt debut

The current Audi A4 is among the oldest vehicles in the brand's lineup. Having debuted back in 2008, it's long overdue for an update, and according to our friends at Indian Autos Blog, that'll happen in roughly six months. IAB spoke to Audi research and design chief Ulrich Hackenberg, who indicated that the fifth-generation A4 will be shown at the 2015 Frankfurt Motor Show in September. The new sedan will be unveiled in "a pre-presentation" before the auto show itself, Hackenberg told IAB, adding that "you'll be happy to see it." Information beyond that, though, remains sparse. Based on our previous spy photos, we expect the new A4 to ride on the Volkswagen Group's modular MLB Evo platform that's been stretched to accommodate a larger wheelbase. The styling, meanwhile, will be more evolutionary, inspired in part by the new TT. Expect more on the next-generation A4 as September approaches. Related Video:

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.

Next Audi R8 E-Tron could have 280-mile range

Just 265 miles of range on a single charge? Meh. That's what the folks at Audi might be saying about the Tesla Model S and its estimated range. Because the German automaker says the next iteration of the R8 E-Tron could go 450 kilometers on a charge, or about 281 miles. This information comes from Automotive News, which cites a presentation from Audi technology chief Ulrich Hackenberg at the company's annual press conference. The fact that the car will soon be available "upon request" is also news. The project was thought to be shelved until reports came out late last year saying that Audi figured out a way to upgrade its lithium-ion battery technology to double its range. Audi spokesman Brad Stertz said the company wasn't disclosing details related to if or when the car would reach North America or how much it would cost (we're guessing a really large number of dollars) but he did say it was notable that the project was back on track. Audi made news in the summer of 2012 when the R8 E-Tron set the "series production electric car" speed record with a 8:09.099 minute-time at Nurburgring thanks to a boosted top speed of more than 155 miles per hour.