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New info on how VW, Porsche, Audi V6 TDI engine cheat works

The German newspaper Bild am Sonntag is reporting that US investigators have found three pieces of software that work in concert to turn off the emissions control equipment in certain diesel models after a set period of time. The engine in question, the 3.0-liter TDI turbodiesel, was found in certain Volkswagen Touareg, Audi Q7, and Porsche Cayenne models – the sale of which was suspended in the US late last year. Since most emissions compliance testing takes around 20 minutes, the software in the three VW Group models shuts off the emissions control equipment after 22 minutes, a straightforward end run around the testing. Remember that the 3.0-liter TDI engines aren't included in the big buyback and recall program announced for the smaller 2.0-liter, four-cylinder TDI engines. The 3.0-liter engines will likely get their own program, but we don't know when to expect it or exactly what it will look like. Last month, California rejected a proposed fix for the larger TDI engines, and VW went back to the drawing board. Since the company is unlikely to create two fixes, one for California and one for the rest of the nation, the company can't really proceed until they figure out a solution California will accept. The EPA hasn't officially commented on the report, and we don't know how Bild am Sonntag came across the information, but we'll be closely watching what emerges after this report. Related Video:

2015 Audi Q3 headed for Detroit before hitting US showrooms this fall

The market for small premium crossover vehicles continues to grow in popularity here in the US, and Audi is finally ready to get in on the action. Going up against competitors like the BMW X1, Land Rover Range Rover Evoque and soon-to-arrive Mercedes GLA-Class, Audi will unveil a US-spec version of the 2015 Q3 at the Detroit Auto Show next week. And in what we can only assume is an amusing coincidence, the Q3 will go on sale during Q3 of this year.
As we reported back in October, it appears that our Q3 will boast a slightly taller ride height than its European counterpart, but Audi isn't releasing too much information about the crossover just yet. What we know for sure is that it will be powered by Audi's well-liked 2.0-liter turbocharged TFSI inline-four producing 200 horsepower and 207 pound-feet of torque. A six-speed automatic transmission and front-wheel drive will come standard, while Audi's Quattro all-wheel-drive system will be optional.
Visually, the 2015 Q3 shown here has a different front fascia design than its European counterpart, but it's not immediately clear if this is exclusive to the US model or if it will be a new element for Q3 in all markets. We don't expect pricing to be announced until closer to its on-sale date, but the Q3 will definitely be stuffed with content, even in base form. Audi has already confirmed such niceties as a panoramic moonroof, Xenon headlights and heated leather seats. Delivering a good amount of practicality for its size, the Q3 will provide a maximum cargo capacity of up to 48.2 cubic feet and 16.2 cu-ft with the rear seats in place.

Next Audi RS4 to get an electric turbo?

We don't yet know if the next Audi RS4 will come to the US, but whoever gets it could find an electric turbocharger under the hood according to a report in Auto Express. The 4.2-liter V8 that has served for two RS4 generations is retiring from the line, replaced by a twin-turbocharged version of the supercharged 3.0-liter V6 used in the S4. But instead of using two sequential turbochargers - a smaller one to eliminate lag while a larger, more powerful turbo spools up - batteries charged by brake regeneration could power a first-stage electric turbo. The idea hasn't been publicly appointed for a particular model, as Audi's technical chief Ulrich Hackerberg has said that due to expense, that kind of setup "would only be used be used on the very top end models." Since the technology cuts down on the use of exhaust gases, it would also also help in markets like Europe where CO2 emissions are a factor. No matter whether it benefits from all conventional or some electric boost, the horsepower number for the twin-turbo V6 will be more than 420 hp but less than 503 hp, the rating of the V8-powered Mercedes-Benz C63 AMG. Auto Express believes Audi will want to maintain the power gap between the 333-hp S4 and previous, 444-hp RS4. With Hackenberg saying the new S4 will make more than 350 hp, that gets the coming RS4 up to at least 461, but AE figures it "could deliver as much as 480 hp." We'll find out sometime after the S4 launches next year.