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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.

2016 Audi S6 Quick Spin [w/video]

Back in my salad days, when I was rocking a the greatest Civic Si of all time, the occasional pair of leather pants, and a yen for malt liquor and grass (both of which quickly put an end to the leather pants), a car like the 2016 Audi S6 would've made my head explode. "What's that?" I might have asked. "A roomy four-seat Audi with more than 400 horsepower and all-wheel drive, that looks like it was sculpted by Ralph McQuarrie? Pushing 30 mpg and under five seconds to 60 miles per hour? The hell you say." And that's even before Future Me showed Skinny Me an interior full of carbon fiber and aluminum, God's own quilted-leather sport buckets, and a 'radio' that would've made my Dreamcast look like an Atari 6400. (If you haven't picked up on the vibe yet, I was kind of a weird nerd in the late '90s.) Gentlemen, we live in the future; I just drove a mid-cycle-refresh Audi that proves it. Driving Notes The 4.0-liter, turbocharged V8 is tailor-made for smoothly pulling around anything less-well-endowed than the M5/E63/CTS-V set. Now up to 450 horsepower and 406 pound-feet of torque (versus the 420 hp and 406 lb-ft of last year's model), there's enough pull in the easily accessible powerband to satisfy all but lunatic drivers. It doesn't feel staggeringly fast, but that's only because 500 horsepower has become so commonplace in the new uber sedan game. It's quick enough. Remember when 250 hp was a crazy number? The car sounds like it has a V8, too. That may seem obvious, but in Generation Direct Injection things tend to get a bit clattery. You'll get some of that if you open the hood with the engine running (as I did in one of the Short Cuts above), but none where it counts: behind the wheel, windows up, stereo down, foot to the floor. That recipe delivers a hushed, baritone-sung song about understatement. Less subtle is the braking force when used at or near the top of its ability. After a moment of surprise and delight while decelerating in normal traffic, I went back-road hunting to test a few pseudo panic stops. Vented 15.7-inch front discs, with 14-inchers in the rear, provided a fast and steady haul-down from 70 miles per hour. Remember when wheels were 15 inches? I mean, you need those big brakes and potent engines to move and stop a car this hefty. With a base weight of 4,486 pounds – no doubt heavier still in my loaded, Dutchman-driven example – it still kind of blows my mind to see the 27-miles-per-gallon highway number.

Bentley doubles down on diesels with a triple-charged Bentayga

Volkswagen Group isn't totally giving up on diesels. While its flagship VW brand is clearly tarnished, the ultra-luxury Bentley division just revealed plans for its first oil-burner, a triple-charged 4.0-liter V8 that produces 429 horsepower and 664 pound-feet of torque. If the powertrain sounds familiar, that's because it's the same one found in the Audi SQ7 TDI. It's a clever system capable of giving what Bentley claims as the world's fastest diesel SUV a top speed of 168 miles per hour and a zero-to-62 mph time of 4.8 seconds. The SQ7 TDI can get to 62 mph in the same time, but is electronically limited to 155 mph, because it wouldn't make sense if the cheaper SUV could outperform the much more expensive one. The Bentayga also emits the lowest CO2 output of any Bentley and has a range of over 621 miles on one tank. Despite having a curb weight of 5,269 pounds, Bentley claims the Bentayga can get a combined rating of 35.8 mpg on the European cycle. The Bentayga Diesel may not be as powerful or as fast as the W12-powered model, but it's a lot more fuel efficient as the latter achieves a combined rating of 21.6 mpg on the European cycle. Other than the new engine, the Bentayga diesel is nearly identical to its gasoline-powered twin except for some discreet "V8 Diesel" badges on the front doors, a new exhaust outlet design, and a black grille. A Bentley spokesperson confirmed that the Bentayga diesel would not be sold in the US. And since Bentley won't be at this year's Paris Motor Show, don't get your hopes up on spotting the vehicle there. The diesel-powered SUV will go on sale in Europe early next year, which will be followed by its release in Russia, South Africa, Australia, New Zealand, and Taiwan. Pricing for the SUV has not been announced yet. Related Video: Featured Gallery 2018 Bentley Bentayga Diesel View 20 Photos News Source: BentleyImage Credit: Bentley Green Audi Bentley SUV Diesel Vehicles Luxury Performance bentley bentayga