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More details on next Audi A4 mooted, including PHEV

With just under two more years until the next-gen Audi A4 hits the streets, it's not surprising that details are starting to leak out. The Brits from Autocar are reporting some information on the 2015 A4, although it isn't clear where any of it came from.
The most substantial news might be in regards to the plug-in hybrid version of the car. We've known for a couple years now that an A4 PHEV was being planned, but the report indicates that a trio of plug-in configurations are being planned, equipped with a 2.0-liter gas engine, a 2.0-liter diesel engine or a 3.0-liter supercharged V6. All engines will be paired with an eight-speed automatic transmission, and the A4 plug-in is said to have an all-electric range of up to 31 miles.
In terms of styling, the next A4 shouldn't stray too far away from Audi's current design language, but it will introduce a new version of the automaker's signature grille. Despite being about the same size as the existing A4, the fifth-generation model will drop some pounds thanks to various weight-saving techniques with the most obvious being aluminum body panels. Based on this info, we should see the A4 sedan and wagon in April 2015, an Allroad later in the year and a redesigned A5 lineup hitting the scene in 2016.

Next-gen Audi RS4 coming, might make it to America

Let us be frank: The second-generation Audi RS4 was one of the best, most exciting cars of the past decade. A four-door sedan with a 4.2-liter V8, all-wheel drive, and a six-speed manual transmission? What wasn't to like? While you can still get a taste of the B7 RS4's character with the current RS5, it isn't quite the same. That's why we're giddy about a new report from Car and Driver, which claims that not only is a new RS4 on the way, but that it could, maybe, possibly return to the United States. As previously reported, the fourth-generation RS4 will go back to a twin-turbocharged V6, after two generations of unassisted V8s under the hood. As per RS4 tradition, it will also be limited to a five-door Avant body style, because "that is what people expect from the RS4," Quattro GmbH boss Heinz Hollerweger told Car and Driver. An RS5 Sportback could also be in the offing, which might remain more true to the character of the first US-market RS4. The US question, though, remains an iffy one, largely because of the Avant shape. Audi has reduced the number of wagons it's offered in the US over the years, dropping the A4 and A6 Avant, although the former is sort of still offered in the form of the Allroad. But that position might be enough to keep the next-gen RS4 off our shores, although as the Quattro boss told CD the US market is changing and "there is more demand there [for wagons], so maybe that will change." Well, Herr Hollerweger, we're here to tell you that America loves wagons, and that you should put the next-gen RS4 on sale over here post haste. Danke.

Recharge Wrap-up: Ferrock a carbon-negative cement substitute, Audi makes e-diesel

A cement alternative uses recycled materials and traps CO2 rather than producing it. Invented by David Stone at the University of Arizona, Ferrock uses recycled steel dust and glass to produce a substance stronger than conventional concrete. Cement has a high carbon footprint from the high heat needed to process the limestone. Ferrock needs no such heat, and it actually uses CO2 to harden, making it, as Stone calls it, a carbon-negative material. Learn more in the video above, see the transcript at PBS NewsHour and read more at Green Car Reports. Teslarati offers a detailed rundown of Tesla's new Valet Mode feature for the Model S. Part of the Firmware 6.2 update, Valet Mode allows the owner to disable certain performance features and block personal information when letting someone else drive the car. It limits the car's to speed to 70 miles per hour, and caps output at 80 kW. It can also disable mobile app access, Homelink, Bluetooth and wifi and the "Places" function, which stores addresses for you. The folks at Teslarati did find some shortcomings in the new feature, though. Read more at Teslarati. Audi has produced its first batch of e-diesel made from water and CO2. The fuel is made by reacting hydrogen from the water with CO2 to make long-chain hydrocarbon compounds called "blue crude." That can then be refined similarly to crude oil to make e-diesel, which is a fuel free from sulfur and aromatic hydrocarbons. That e-diesel can be used on its own, or mixed with fossil fuel diesel to power a vehicle. "In developing Audi e-diesel we are promoting another fuel based on CO2 that will allow long-distance mobility with virtually no impact on the climate," says Audi Head of Sustainable Product Development Reiner Mangold. Read more in the press release below. Fuel of the future: Research facility in Dresden produces first batch of Audi e-diesel - The verdict: Pilot plant produces high-quality diesel fuel - No need for mineral oil: e-diesel made from water, CO2 and green power - Minister Wanka: "Synthetic diesel using CO2 is a huge success" Audi has taken another big step in the development of new, CO2 neutral fuels: A pilot plant in Dresden has started production of the synthetic fuel Audi e diesel. After a commissioning phase of just four months, the research facility in Dresden started producing its first batches of high-quality diesel fuel a few days ago. To demonstrate its suitability for everyday use, Federal Minister of Education and Research Prof.