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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:

VW considering single, cheaper li-ion cell for all plug-in vehicle batteries

Volkswagen is finding rapid success in the battery electric vehicle market; especially in Europe where the e-Golf is already the segment sales leader. Recent concepts like the C Coupe GTE, Sport Coupe GTE and Cross Coupe GTE suggest more plug-in hybrids from the company are on the way, too. To make future models more economical, the German automotive giant is considering switching to a standard design for its lithium-ion battery cells. Using standardized parts is a long-accepted principle in production because it leads to economies of scale, and a company can pass on the savings to buyers or pocket the money to boost profits. VW is aiming for a massive 66-percent drop in costs by switching to a unified design, according to Heinz-Jakob Neusser, the board member in charge of development, to Automotive News. While the cells would be uniform, they could be crafted into different modules to fit each specific model. VW currently buys cells from Panasonic and Samsung for various models, but under the new plan all of the automaker's brands would switch to a single one. "We have a clear understanding in the group of a common cell," Neusser said, according to Automotive News, without suggesting when a change might happen. VW also has a few months decide on a different future for its EVs. The automaker is reportedly considering whether to use sold-state lithium-ion batteries from a US-based supplier for upcoming models. The next-gen tech could potentially give a massive boost in range while also being fireproof.

U.S. tariff threat hits European automakers' stocks

FRANKFURT, Germany — A U.S. warning that it may introduce tariffs on foreign auto imports hit shares in German carmakers BMW, Daimler and Volkswagen on Thursday, which together have a more than 90 percent share of North America's premium car market. Washington said on Wednesday it had launched an investigation into whether car and truck imports are a national security issue due to signs they had damaged the U.S. auto industry. That could lead to new U.S. tariffs — up to 25 percent — similar to those imposed on imported steel and aluminum in March. BMW and Daimler shares fell as much as 3.1 percent in early Thursday trading, while Volkswagen's dropped as much as 2.5 percent. "(U.S. President) Donald Trump is obviously not thinking about how to prevent a trade war. Import duties on cars would be a nightmare for the German auto industry and would lead to a massive sales impact," said Thomas Altmann at Frankfurt-based asset manager QC Partners. BMW on Thursday condemned the move to consider tariffs. "The BMW Group is committed to free trade worldwide. Barrier-free access to markets is therefore a key factor not only for our business model, but also for growth welfare and employment throughout the global economy," it said. Daimler, which makes Mercedes-Benz cars, and Volkswagen, which makes upmarket Audis and Porsches, were not immediately available for comment. German carmakers produced 804,000 cars at local factories in the United States and exported 657,000 German-made cars into North America last year, according to German auto industry association VDA. China took pains on Thursday to welcome German firms and investments, with Premier Li Keqiang talking up relations after a meeting with German Chancellor Angela Merkel. BMW and Mercedes have expanded production capacity in the United States, but BMW, Audi, Volkswagen and Daimler have also invested billions to build new factories in Mexico in the hope of selling locally produced cars into the United States. German carmakers hiked vehicle production in Mexico by 46 percent to 620,000 cars last year, while production levels inside the United States fell by 6 percent to 804,000 cars because of a shift to Mexico, according to the VDA. BMW has its biggest factory worldwide in Spartanburg, South Carolina, and is the largest vehicle exporter among all the carmakers in the United States measured by value of goods exported. More than 70 percent of BMW's U.S.-made cars are exported.