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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:

2016 VW GTI Clubsport is a new breed of forbidden fruit

And this, friends, is the closest we'll ever get to the Volkswagen GTI Clubsport. As we were sad to report, this middle child between the standard GTI and the high-performance Golf R will not be coming to our shores, no matter how much we beg and plead. For those that need a refresher, the Clubsport was inspired by a concept originally shown at Worhtersee earlier this year. Its positioning means it's up on power – there are 261 (probably underrated) horsepower in this compact – although mum's the word on any upgrades to the suspension. As we previously noted, the extra 51 hp over stock will get the mid-level hot hatch to 60 in just 5.9 seconds, if you opt for the dual-clutch automatic, or an even six seconds with the manual trans. Loathe as we are to admit it, aside from the extra horsepower, most of the stuff about the Clubsport appears to be aesthetic. The body kit is all new and significantly more aggressive than the what's found on the GTI, while new 18-inch wheels are standard, although 19s can be optioned. Also larger, the twin chrome exhaust tips. In the cabin, there are far more aggressive sport seats, which are quite simply too cool to be sold in the US (just kidding, it's probably some silly federal regulation). We just had to mosey on down to the Volkswagen stand and check out the new GTI Clubsport. You can view all of our shots of the new hatch up top. Related Video:

Watch Chris Harris in the electric VW ID.R waste a McLaren 720S

The Volkswagen ID.R doesn't have much in common with a McLaren 720S, other than the fact that they are both performance-crazed cars. One gets its power from batteries, the other from gas. One uses electric motors, the other a twin-turbocharged 4.0-liter V8. One is a halo prototype vehicle, the other is a road-legal supercar available for purchase. So when Chris Harris and "Top Gear" decided to "race" the two against each other, it was more of a demonstration of the VW's unreal capabilities than any sort of real competitive faceoff. In episode five of Top Gear's 28th season, which just aired February 23, the trio of Harris, Freddie Flintoff and Paddy McGuinness welcomed Youtuber KSI on the show and ventured out on a luxury sports car road trip with an Aston Martin, Porsche, and Ferrari. Separately, Harris took to the track to test out Volkswagen's golden egg of the moment, the ID.R. As VW fully launches into its electric-vehicle push, the ID.R is meant to exhibit what battery-electric technology is capable of. With two electric motors, one on the front axle and one on the rear axle, the 2,425-pound ID.R has four-wheel drive and makes a claimed 670 horsepower. As Harris notes in the video, the ID.R. was not built for a specific regulation-bogged racing organization or competition, and thus, it's only held back by the rules of Mother Nature and Father Physics. Since the car's debut, it has been annihilating records around the world, including at Pike's Peak, Goodwood, the Nurburgring, and Heaven's Gate. Chris Harris didn't set any records in the ID.R., but he certainly showed how outrageous this machine is. The 710-horsepower 720S can go from zero mph to 62 mph in less than three seconds, and the ID.R has a sizable lead within that same time. Again, this wasn't an instance of test-and-conclude, it was a show of perspective. The ID.R is a race car, so even though the 720S is one of the best supercars in the world, it never stood a chance. See for yourself above. Related Video: