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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:

Volkswagen building budget car family planned for China in 2018

Volkswagen has publicly pondered a low-cost car for China, something akin to Nissan's Datsun revival in Southeast Asia, for at least three years. In 2013 it tapped Chinese partner FAW to help develop an entire budget brand, with plans to have something on the market in 2016 in the 6,000- to 8,000-euro range. About a year ago, VW said it couldn't figure out how to engineer an inexpensive car that didn't run counter to the brand's values, then three weeks later said it had overcome the issues. Reuters now reports that VW CEO Martin Winterkorn told German newspaper Bild am Sonntag, "We will bring a budget-car family to market in 2018, with an SUV, saloon and hatchback." Winterkorn didn't offer any other details like who VW would work with to build it - VW has partnerships with both FAW and SAIC, but the announcement will be welcomed by the brand's Chinese outpost. When this adventure started, VW said it was working to create a model that would cost 6,000 to 8,000 euro. That estimate has increased. Winterkorn is now saying the 2018 offerings will come in between 8,000 and 11,000 euro. In a straight euro-to-yuan conversion, that would equate to Chinese pricing of 56,000 to 77,000 yuan. For comparison, the New Polo with a 1.4-liter engine and a manual transmission starts at 85,900 yuan. Perhaps with an eye on the success of the Nissan-Renault sub-brand Dacia in Europe and emerging markets, Winterkorn told Bild, "We will see if this is something of interest for other markets as well." On the opposite end of the price/performance spectrum, Winterkorn also said that VW is working on two new models for Bugatti, one powered by a traditional gasoline engine and another with some sort of hybrid setup. The latter model would reportedly be the higher-performing of the two, though it's not clear whether there would be two vehicle lines or two versions of the same vehicle. As ever, as soon as we know more, so will you.

2023 New York Auto Show Live Updates: Hyundai's surprise, Nissan's super stand, '24 Wrangler

The 2023 New York International Auto Show shifts into high gear Wednesday, April 5, and our reporters are already in the city, with events unfolding even as we speak. We'll being seeing cars in person, interviewing automaker insiders and snapping photos of vehicles and all the other oddities that pop up at an event like this and we'll be giving you live updates and color from the show floor along the way.  Ram, Hyundai, Subaru, Kia, VW and Jeep are all expected to show something new this week, and other automakers are known to be hosting off-site events that may produce news — expected or otherwise. Genesis has already revealed its GV80 Coupe, for example, along with the fact that it has been confirmed as a production model. And we're just getting started.  Read on below for our observations from the show floor and points beyond: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.     Green New York Auto Show Genesis Hyundai Jeep Kia RAM Subaru Volkswagen Concept Cars Electric Future Vehicles