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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:

Piech and Winterkorn still at odds about VW leadership plan

Volkswagen Group Chairman Ferdinand Piech (above, right) and CEO Martin Winterkorn (above, left) will be meeting in the coming days to discuss who the next leader of the Volkswagen Group will be. This, of course, comes after a report last Friday in Der Spiegel where Piech said he didn't want Winterkorn to be the automaker's next chairman. Oh, to be a fly on the wall of that conference room. As Automotive News reports, Winterkorn had been widely viewed as the probable replacement for the 77-year-old Piech, until last week, when the current chairman said he was keeping the CEO "at a distance," in the German paper. While Winterkorn confirmed to German media on Monday that he still had a job, analysts aren't sure what Piech's comments will mean for the 67-year-old CEO's future, with some indicating he may end up being a "lame duck" leader. According to AN, Piech doesn't think that Winterkorn has the vision to lead the sprawling Volkswagen Group empire, even though the current CEO has the support of a number of other VAG stakeholders. "Piech knows what he is doing and will assume that he can get the supervisory board to implement his decisions," former BMW executive turned analyst Helmut Becker told German media, AN reports. Winterkorn has just over 18 months left on his contract, while Piech's term has another two years left on it, meaning it will still be some time before we find out how the Volkswagen Group's leadership issues play out.

Volkswagen Golf R Evo may debut at Beijing Motor Show

If a report in Auto Express is correct, a lighter, faster brother to the Volkswagen Golf R will be shown to the world at the Beijing Motor Show in April. Said to be called the Golf R Evo, the even harder hot hatch would be unveiled as one of those concepts that's practically a de facto presentation of the genuine thing. The Evo in its name will come from having a carbon fiber roof and CF in the bodywork, lighter wheels, thinner bucket seats up front and a roll cage instead of rear seats.
If there's a power increase, it's been described as "a small bump." However, as the report mentions, if the Jenny Craig regimen can drop 100 kilograms (220 pounds) from the the 3,247-pound weight of the European Golf R, then the Golf R Evo will do about the same damage on the scales as the Golf but have at least 50 more horsepower and 44 more pound-feet of torque.
Since we still don't have the current Golf, this isn't something that should keep you awake even if the 'concept' does become a production model. But it is good to know that the Golf R is really going to start pushing its boundaries.