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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 updates Scirocco with revised styling, new engines

The Scirocco is undoubtedly one of the better-looking models in the Volkswagen lineup, but introduced back in 2008, it's now been on the market - some markets, anyway - for the better part of six years. VW is said to have an all-new replacement in the works, but before that arrives, the German automaker has announced a facelifted version with revised styling and a new engine lineup.
Set to be revealed at the Geneva Motor Show next month, the new Scirocco benefits from updated styling front and rear, high-tech exterior lighting, a revised cabin space with some throwback retro touches, some new technologies and, of course, an array of fresh wheel options ranging from 17 to 19 inches.
The updated Scirocco will be offered with a wide array of engines right from the get-go, including four gasoline options and two diesels, spanning from 125 horsepower all the way up to the 280-hp Scirocco R. The 2014 model hits European showrooms in August, but unfortunately isn't any more likely to make the transatlantic voyage Stateside than the version it replaces. Still interested? There's plenty to see in the high-res image gallery above and details in the press release below.

2022 Genesis GV70, raging at VW ID.4 tech and thoughts on a new Lexus LFA | Autoblog Podcast #696

In this episode of the Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor James Riswick. This week, they talk about driving the Genesis GV70, VW ID.4 and VW Taos. They talk about ways Chevy could "fix" the Camaro. James ranked all the James Bond films based solely on their starring cars. Next, they reach in the mailbag and discuss the question, "Do you think Lexus will make a successor to the LFA and, if so, what do you guys think it would be like?" After ruminating on that query, they dip into the mailbag a second time to recommend a sporty crossover to a listener in this week's Spend My Money segment. Send us your questions for the Mailbag and Spend My Money at: Podcast@Autoblog.com. Autoblog Podcast #696 Get The Podcast Apple Podcasts – Subscribe to the Autoblog Podcast in iTunes Spotify – Subscribe to the Autoblog Podcast on Spotify RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown What we're driving: 2022 Genesis GV70 2021 Volkswagen ID.4 2022 Volkswagen Taos How we'd fix the Chevy Camaro All 24 James Bond movies ranked only by their cars Mailbag: What would a Lexus LFA successor look like? Spend My Money Feedback Email – Podcast@Autoblog.com Review the show on Apple Podcasts Autoblog is now live on your smart speakers and voice assistants with the audio Autoblog Daily Digest. Say “Hey Google, play the news from Autoblog” or "Alexa, open Autoblog" to get your favorite car website in audio form every day. A narrator will take you through the biggest stories or break down one of our comprehensive test drives. Related Video: Lexus LFA | TRANSLOGIC