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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 could outsell GM in China for the first time in nine years

As of the end of November, Volkswagen had sold 70,000 more cars than General Motors in China in 2013, making it appear inevitable that VW will outsell GM there. The feat would return the German brand to the top of chart in China for the first time in nine years, but even the second-place getter won't be complaining too loudly: both automakers sold more than three million vehicles in a market pegged to hit 16 million sales this year.
Volkswagen said it could have sold more cars if it had had more production capacity in China. The arrival of a new-to-China Audi A4, a China-built A3 sedan, the VW Bora and Skoda Octavia, as well as an $18.2-billion-euro investment in the country to construct new factories, means VW should see its numbers grow in 2014. GM's lineup is expanding next year, too, adding four Chevrolet nameplates and two vehicles to its Baojun brand as it tries to get to five million in sales by 2015.
Among other automakers, Ford benefited from good product and woes for Japanese automakers over a territorial dispute with China, outselling Toyota by almost 32,000 units through the end of November. The Ford Focus is China's best-selling vehicle so far this year.

2015 Volkswagen Golf SportWagen First Drive [w/video]

Volkswagen currently offers five Golf models in the US, and in just a few weeks it will add the 2015 SportWagen to the lineup. The previous version sold as the Jetta SportWagen, although it was technically a Golf. For the new model, VW product planners decided to align all the hatchbacks under the same name. The SportWagen employs the same engines as the Golf, but significantly stretches its new MQB architecture. The result is greater practicality in the form of cargo room. With the seats up the SportWagen holds 30.4 cubic feet, almost 8 more than the Golf. The gap widens to nearly 14 cu ft with the seats folded; a max capacity of 66.5 cu ft puts the SportWagen into compact crossover territory. That added functionality leads VW to think it can sway buyers shopping the likes of the Honda CR-V and Toyota RAV4. And with the high-mpg diesel variant – 31 mpg city, up to 43 highway – VW hopes to lure those considering fuel-sipping MPVs like the Toyota Prius V and Ford C-MAX. What separates this Golf from those other two segments is the driving prowess we've come to expect from Wolfsburg's best-selling nameplate. While the silhouette is similar to the outgoing Jetta wagon, designers honed the character lines to give the Golf SportWagen a more modern, angular aesthetic. The LED headlights look sharp, the hood now scoops down at a steeper angle into the front fenders, and the general proportions – in line with other Golf models – have changed. The new SportWagen is lower, longer, and wider and than the Jetta SportWagen it replaces. Specifically, it is 1.1 inches longer, 0.7 inches wider, and despite being about an inch lower, actually boasts more headroom. Inside, things look pretty familiar to the current Golf family. There are small, premium touches such as a sporty, flat-ish-bottom wheel, piano-black trim, and an optional one-touch panoramic sunroof that makes the cabin a bright, airy, and pleasant place to be. Otherwise, it's your standard Golf fare, but with a whole lot more room out back. The same two engines that power the standard Golf – the 1.8-liter turbocharged inline-four TSI, and 2.0-liter turbocharged TDI diesel – are also found under the hood of the SportWagen. Gasoline-powered models come with a five-speed manual or a traditional six-speed auto, while the TDI gets six-speed transmissions across the board – either as a row-your-own manual, or a dual-clutch DSG auto with steering wheel-mounted paddles.