2012 2.0 Tdi Premium Used Turbo 2l I4 16v Automatic Front Wheel Drive Hatchback on 2040-cars

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To solve diesel problem, VW might need two fixes

Volkswagen says that a fix is on the way for its 11 million vehicles around the globe that are equipped with diesel engine software that can evade emissions tests. The problem might be far more complicated than simply creating a single solution for all of them, though. According to Automotive News citing Reuters, two remedies to cover different NOx-reducing systems could be necessary, and both potentially affect performance. Earlier examples of the EA 189 diesel engine used a lean NOx trap to reduce the harmful material coming from the tailpipe. According to experts in the Automotive News report, a software update might allow the engines to achieve compliance, but that could affect fuel economy. VW already tried this route once before the scandal came to light, but tests by the California Air Resources Board still showed the figures were too high. Later, some of the 2.0 TDI engines began using Selective Catalytic Reduction that reduced NOx by injecting a urea solution into the exhaust stream. According to Automotive News, a software update for this equipment might increase the amount of the substance used. Not only would that mean topping up the fluid more often, but there still could be some reduction in fuel economy. But, since the 2-liter, 4-cylinder TDI engine that sits inside the diesel vehicles first mentioned as being affected by the issue in the US don't have a urea treatment system, VW would need to install them into these cars. VW still hasn't officially outlined its solution (or solutions) to the emissions issue but is expected to soon. The automaker's long-term evasion of regulations with these diesel engines pumped vast quantities of additional NOx into the air. The substance is known to be linked with smog and acid rain. The US Department of Justice is already beginning an investigation into the company, and politicians are pushing for harsh punishments.

Audi Nanuk Quattro Concept is a wild surprise ahead of Frankfurt

Volkswagen Group Night ahead of the Frankfurt Motor Show always has some surprises, the first of which this year is the Audi Nanuk Quattro Concept. The all-wheel-drive, turbo-diesel-powered supercar is similar to the Giugiaro Parcour Concept that was unveiled earlier this summer. In fact, the Parcour's creator, Italdesign Giugiaro, penned the Nanuk, and we suspect much of the former found its way into the latter - with some changes, of course.
The diesel engine, a departure from the Parcour, is a twin-turbocharged 5.0-liter V10 TDI unit that develops 544 horsepower and a hole-digging 738 pound-feet of torque, which make the 4,189-pound all-road vehicle able to dispatch 0-62 miles per hour in 3.8 seconds and go on to a 190-mph top speed. Fuel consumption is a relatively low 30 miles per gallon for a car with this much performance.
The Nanuk showcases Audi's Quattro, though it uses a specially designed version of the all-wheel-drive system to get the job done. Audi's next generation of adaptive air suspension is featured as well, which fits the crossover nature of the Nanuk. Drivers are given a range of 2.76 inches of height adjustment, though Audi doesn't mention the car's minimum or maximum ground clearance.

Audi celebrates 25 years of TDI

Nope, the diesel engine never really did go out of style for Audi. Now, the German automaker has released a video reminding the world of its persistence with the oil-burners and is commemorating the Silver Anniversary of Audi's first commitment to turbodiesels in 1989. And, yes, there are some road racers shown in the clip, so some of those bad boys actually move pretty well. Audi engineers on camera admitted to some of the early TDI engines being "slow" but still valuable for their torque and, obviously, their fuel economy relative to gas-powered engines. A bunch of tinkering later, though, and Audi says its diesels can be a legitimate "part of a performance car" and has even overcome the issue of noisiness that's often associated with diesels. The automaker made some news in these parts a few years back when its Audi A3 TDI won the 2010 Green Car of the Year at the annual LA Auto Show in late 2009, and the model even succeeded a fellow diesel (the Volkswagen Jetta TDI) to boot. Granted, diesel sales aren't nearly as popular in the US as they are in Europe. Still, Audi last year boosted its diesel sales in the US by 40 percent to 10,076, which was about a tenth of what sister company Volkswagen sold in diesels last year in the States. And things have looked even rosier this year for Audi's TDI sales. Through June, Audi diesel sales have almost quadrupled from a year earlier to more than 8,100 units. Check out the 150-second video on Audi's 25-years of TDI production below.