2003 Audi A4- Awd-manual Shift-6 Cylinder on 2040-cars

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2017 Audi A4 evolves into a larger, lighter luxury sedan [w/video]

Audi took the evolutionary, rather than revolutionary, approach when it came time to redesign the brand's A4. While the latest generation's look might not set hearts racing, a plethora of tiny tweaks by the engineers manage to make the the four-door larger, up to 264 pounds lighter, and slice the drag coefficient down to 0.23. Audi has made its modern reputation on the style and quality of its interiors, and the new A4 seems to make good on that tradition. In-cabin appointments and tech see a serious upgrade, including offering Audi's fully digital, Virtual Cockpit, instrument panel. In the US, the new A4 arrives for the 2017 model year offering power from either diesel or gasoline. The 2.0-liter TDI is essentially a carryover from the Audi lineup, but the 2.0-liter TFSI sees some big upgrades, including a new cylinder head. It's now rated at 252 horsepower and 273 pound-feet of torque. At launch here, all A4s get a seven-speed S-tronic dual-clutch gearbox. Front-wheel drive and Quattro all-wheel drive are available. For an added dose of forbidden fruit, you can check out the crimson A4 Avant in the gallery above the from Frankfurt Motor Show. Take a good look because this long-roof variant isn't coming to the US. Yes, we're listening to sad violin music, too. Although, the next Allroad is coming here eventually after that higher-riding wagon debuts.

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.

Weekly Recap: The divergent paths of Tesla and Fisker

There's no doubt that Tesla is downshifting while Fisker has been grinding its gears. But it wasn't always that way.
In the wake of Tesla's recent success, it's easy to forget that there were once two California electric carmakers with bright futures.