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TRANSLOGIC 150: Volkswagen XL1

How do you build the world's most fuel-efficient production car? Start with the world's most aerodynamic design. The Volkswagen XL1 is capable of 261 miles per gallon thanks to its sleek shape and ultra efficient plug-in diesel hybrid powertrain. The downside is that only 250 will be made and none will be sold stateside. That didn't stop us from taking our turn behind the wheel of this truly revolutionary ride.

West Virginia researcher describes how Volkswagen got caught

The cheating scandal engulfing the world's largest automaker started with a road trip. In the spring of 2014, researchers from West Virginia were evaluating the tailpipe emissions of diesel cars made for the American market by European manufacturers, something never before studied in the academic realm. Excited by the prospect of breaking new ground, the team of two professors and two students wanted to gather as much data as possible. "And being academics, we went a little overboard," said Arvind Thiruvengadam, one of the students. "Being academics, we went a little overboard." Overboard included driving the cars for more miles than they needed to test and verify results. Drivers put about 1,500 miles on each of the first two cars in the study, a Volkswagen Jetta and BMW X5, along California roadways. For their final car, a Volkswagen Passat, they wanted even more mileage. So they took the car on a road trip from Los Angeles to Seattle and back again, collecting data from more than 2,000 miles of testing. The road trip was Volkswagen's undoing. When the West Virginia team returned to Los Angeles, they were befuddled by the test results. In theory, the Passat should have spewed the lowest levels of pollutants among the three cars. Equipped with the more modern selective catalytic reduction technology, the team expected to find minimal levels of nitrogen oxide. But the car, which had been certified at a California Air Resources Board facility prior to the start of the road trip, had elevated levels of NOx that were 20 times the baseline levels established beforehand. The researchers, comprised of professors Gregory Thompson and Dan Carder and students Marc Besch and Thiruvengadam, knew their on-board equipment functioned properly because, early in their research, they had double-checked its accuracy after recording sky-high NOx readings from the Jetta that showed 30 times the level of its baseline testing at the CARB facility. It was particularly noteworthy because the Jetta contained the first-generation Lean NOx Trap technology, not the more efficient SCR, yet both produced large discrepancies. The BMW, on the other hand, performed as expected. Today, Thiruvengadam is careful to say the research team never suspected Volkswagen of cheating on emissions testing, nor did the researchers report such a finding. They merely reported their findings to CARB officials who then further investigated.

VW Golf GTD wagon makes us swoon ahead of Geneva reveal

The European market is just crammed with power wagons we can't get our hands on: big ones like the Audi RS6 Avant and Jaguar XFR-S Sportbrake, but also little ones like the new Mercedes CLA45 AMG Shooting Brake, Skoda Octavia RS and Seat Leon ST Cupra. Now there'll be one more, and as you might have guessed, it comes from the Volkswagen Group. At the upcoming Geneva Motor Show, VW will present the new Golf GTD Variant. And if you're wondering what it's all about, it's all right there in the name: those three letters tell us it's a performance diesel, and the Variant name tells us it's a wagon (which we'd more readily recognize as the SportWagen on this side of the Atlantic). So there you have it: a performance-oriented diesel wagon, but not one we're never likely to see on American roads. If you ever did see one up close, though, you'd find a 2.0-liter turbodiesel four under the hood with 181 horsepower and 280 pound-feet of torque – enough to send this nimble oil tanker to 62 in 7.9 seconds, all the while returning over 53 miles per gallon (on the lenient European cycle, anyway). Along with the engine, VW has thrown in other GTD performance-minded bits, including a sports suspension and progressive steering. Visual telltales include unique front and rear bumpers, grilles, 17-inch alloys, blacked-out roof rails, smoked taillight lenses and an interior with plaid sports seats, stainless steel pedals... the works. European buyers will be able to enjoy all this and more while hauling all their stuff down the Autobahn, passing gas station after gas station in oil-burning bliss. World premiere of the new Golf GTD Variant - The perfect all-round package: sporty, economical, comfortable and spacious - Launch set for Geneva Motor Show Since 1982 Volkswagen's GTD logo has stood for Gran Turismo Diesel, with its promise of sporty yet economical motoring. Now for the first time, the GTD initials grace the Golf Variant, which like the Golf GTD, boasts the 184 PS (135 kW) TDI engine. The new Golf GTD Variant is set for its world premiere at the Geneva Motor Show, and is available to order as of now at a price of 31,975 euros. The Golf GTD Variant* is excellently placed to establish itself as an iconic long-distance cruiser.