Volkswagen Jetta 2.5 Sedan 4-door on 2040-cars

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VW Jetta TDI dyno shows HP loss trying to recreate cheat mode

Volkswagen is working on a fix for diesel-engined vehicles that are out of compliance with emissions regulations in the US and other countries. We're told that engineers will be presenting a solution internally sometime this month, but that doesn't mean we'll actually see it in the wild this month. One big question we have about the coming fix is, will it affect the car's performance? That question relates to another we have about the engine as it is: How much performance would the 2.0-liter diesel lose right now if it were turned down to pass US emissions? The Fast Lane Car tried to sketch some answers by going to a shop in Denver, Colorado to run a 2011 Jetta TDI with a six-speed DSG transmission on an all-wheel-drive dyno. The thinking was that if you ran all four wheels the car would think it was on the road, whereas if you ran only two the car might think it's being tested. We'll get straight to the numbers: the stock sedan is quoted at 140 horsepower and 236 pound-feet of torque. When run with all four wheels turning it produced an uncorrected 114 hp and 214 lb-ft at the wheels. When run with just two wheels in motion the Jetta got 113 hp and 188 lb-ft at the wheels. Reading the graph, we're told that power differences between the two runs were as much as 15 hp and 32 lb-ft. You'll need to take some salt with these numbers, though, because the dyno and test protocol in the video are nothing like those used by the EPA. The shop attempts to trick the Jetta into 'emissions testing mode' by using the front wheels only for the two-wheel-drive run, but we have a feeling the software code at issue is far more sophisticated than that, since the ICCT, UVA, the EPA, and CARB investigated the situation for more than a year and couldn't figure out. Also, the technician adjusts for being a mile above sea level with a correction factor of 1.2 applied to horsepower and torque, which inflates the disparity in the final power differences over the two runs. Go to YouTube and read the lengthy comments on the video left by Andrew Price for a more thorough dissection of what could explain TFL's disparities. You can watch the video above, and feel free to try and dissect the results yourselves in the comments below. Related Video:

Which car should win 2015 World Green Car of the Year?

There were three finalists for the World Green Car of the Year announced about a month ago at the Geneva Motor Show: the BMW i8, the Mercedes-Benz S 500 Plug-In Hybrid and the Volkswagen Golf GTE. With the New York Auto Show upon us and the winner scheduled to be announced tomorrow, we thought it's high time to ask our readers which one should win. There were seven other vehicles named to the finalists list: the Hyundai x35/Tucson Fuel Cell, the Volvo XC90 T8 Twin Engine, the Audi A3 Sportback E-Tron, the BMW X5 xDrive40e, the Kia Soul EV, the Nissan e-NV200 and the Opel Adam 1.0 Direct Injection Turbo ecoFLEX Start. Would you have named one of these to the top three list instead? POLL 14386429 Green BMW Mercedes-Benz Volkswagen 2015 ny auto show world green car of the year vw golf gte

Recharge Wrap-up: BYD sales surge, new Mazda MX-5, plug-in VW Passat

BYD has enjoyed a tremendous leap in sales since last year, according to Want China Times. Sales from January to April were ten times that of the same period last year, with much of the credit going to government subsidies for clean cars. BYD claims, though, that battery production is limiting the number of vehicles it sells, and that by increasing that production capacity, it will see even more success. BYD's Qin plug-in hybrid, introduced in December, has already sold 4,500 units with another 8,000 orders already placed. Read more here. Mazda will reveal the fourth generation of its MX-5 roadster in September. To celebrate the car's 25th anniversary, the all-new two-seat convertible will debut during simultaneous private events in Spain, Japan and the US on September 3 and 4. Furthermore, the new Miata will be the center of a more public event in Barcelona on September 6. For fans in the US, Mazda will hold a Miatas at Mazda Raceway event from September 5 to 7. The 2016 MX-5 promises to continue to offer a lightweight, balanced design for fun and efficiency. The new Volkswagen Passat will feature a plug-in hybrid version. Volkswagen confirmed the Passat PHEV for Europe at the model's unveiling at the Volkswagen Design Centre in Potsdam, Germany. The plug-in Passat uses a 154-horsepower TSI engine and an 80-kilowatt electric motor for a total output of 208 horsepower. With a full charge, it can travel up to 31 miles on electricity alone. All versions of the eighth-generation Passat use stop-start and regenerative braking. Read more at Green Car Congress. BBC warns that the costs of charging an electric vehicle in the UK could surpass those of fueling a gasoline engine. Not so fast, says The Green Car Website. While the BBC cites charging services like Charge Master introducing fees for rapid charging making it cost about as much per mile to drive as traditional internal combustion engines. The Green Car Website points out that most people usually charge at home for much less, that paying for rapid charging is still not that expensive and that the BBC article misses the point about EVs, anyway. See the BBC article here or click here to read the rebuttal. News Source: Want China Times, Mazda, Volkswagen, BBC News, The Green Car Website via Charged, Green Car Congress Green Mazda Volkswagen Green Automakers Electric PHEV recharge wrapup qin