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A look inside Infiniti's variable-compression engine

We're sympathetic to anyone who had trouble understanding what's going on with Infiniti's new variable-compression engine. While we got a full tech briefing on the novel VC-Turbo back in August, the visual aids were lacking. The cutaway engine Infiniti brought to the Paris show fixes all of that. You can thank the little green and pink lines on the cutaway for making the whole idea a little more clear. Click through the gallery to see two lines – one green and one pink – that represent the different strokes allowing for different compression ratios. Remember, the compression ratio is the amount of volume in the cylinder on intake compared to the amount at the end of the compression stroke. Leave more room at the end and you lower that ratio. The length of the stroke doesn't change with this system, but where it sits along the cylinder does. Hence those two lines. The variable compression ratio allows this new turbocharged engine to maximize fuel economy when the turbo isn't needed by raising the compression ratio. It will see its first use in the next Infiniti QX50 crossover, previewed by the QX Sport Inspiration concept that's also on display in Paris, and has performance targets of 268 horsepower and 288 pound-feet of torque. After, it will migrate to other Infiniti and Nissan vehicles, with transverse front-drive-based applications first in line. Eventually, it's likely to completely replace Nissan's corporate 3.5-liter V6. We'll be poking around the engine a little more in Paris today to try and get some more info. For now, enjoy those cutaway images and those friendly little lines. Featured Gallery Infiniti VC-Turbo engine cutaway View 14 Photos Paris Motor Show Infiniti Nissan Technology Emerging Technologies engine 2016 paris motor show

Mystery shoppers love Infiniti, hate Tesla

Infiniti, followed by Lexus tied with Mercedes-Benz took the top two spots for best sales experience according to mystery shoppers from the latest Pied Piper Prospect Satisfaction Index, while EV manufacturer Tesla recorded the lowest overall score. Not surprisingly, premium brands dominated the top ranks. Including the three already mentioned, luxury brands occupied seven of the top ten spots and included Audi, BMW, Porsche, and the only American brand to crack the upper echelon, Cadillac. Toyota, Volkswagen, and Nissan rounded out the first ten positions. The news for domestic automakers isn't good. Aside from Caddy, the only other star-spangled automaker to score above the industry average is Chrysler. The rest of FCA, most of GM, and all of Ford fell below the line. But Pied Piper's mystery shoppers handed Tesla the biggest walloping – the company is ten full points below the next lowest brand, Volvo, and its score of 86 is 17 below the average of 103. It's baffling, considering the company's touted direct-sales model. "Tesla leaves me scratching my head," Fred O'Hagan, Pied Piper's president and CEO, told Wards Auto. "They own all of their stores, so you would think each one would be doing the same thing. But they're not. Tesla is consistent in its inconsistencies." O'Hagan added that there's a "huge variation" in Tesla's store-to-store effectiveness, and that in some cases, shoppers found showroom workers that acted more like "museum curators," Wards Auto reports. It might be popular to call Tesla the Apple of the car world, but based on Pied Piper's work, the brand has a long way to go to emulate the uniform shopping experience of an Apple Store. The news might be bad for Tesla, but even for the brands that scored below average, there's cause for celebration. Only Tesla and Mini lost points in this year's rankings, and only Mercedes and Lincoln held steady. Every other brand, including Infiniti, which topped the index for the first time, gained at least one point. The biggest improvements belong to Porsche, Land Rover, and Mitsubishi, which all jumped five points. Pied Piper's annual Prospect Satisfaction Index uses mystery shoppers – over 6,100 this year – from across the country to assess dealers and generate rankings from over 50 individual factors. News Source: Pied Piper via WardsAuto Green Audi BMW Cadillac Chrysler Infiniti Lexus Mercedes-Benz Nissan Tesla Toyota Car Buying Car Dealers study

Recharge Wrap-up: utility sells discounted Powerwall, Nissan-Renault builds 340K EVs

Vermont electric utility Green Mountain Power is selling discounted Tesla Powerwalls to its customers in hopes of balancing the grid. The battery packs would be used not just to help customers store renewable energy for home solar systems or as backup power, but also to occasionally discharge power back to the grid when needed. In addition to this decentralized energy storage being useful to customers, it also benefits the utility by taking demand off energy generating infrastructure during periods of peak demand. The pilot project will put 500 Tesla Powerwalls in customers' homes. Learn more at Green Car Reports, or in the story from Vermont Public Radio. Together, Nissan and Renault have built 340,000 electric cars. The allied Japanese and French automakers hit 100,000 EVs in July 2013, 200,000 in November 2014, and a quarter million in June of 2015. The Nissan Leaf, which first went on sale at the end of 2010, makes up the bulk of the EVs the Renault-Nissan Alliance has sold. Renault delivered its 50,000th Zoe EV in April 2016. Leaf sales have declined in the US in recent months, due at least in part to the anticipation of the Chevrolet Bolt and Tesla Model 3. Nissan, however, is expected to update the Leaf with a 200-mile driving range in the coming years. Read more at Green Car Reports. Students at the Bearys Institute of Technology (BIT) in Karnataka, India have built what they call the Hybrid Water Car. The car uses a system to electrolyze hydrogen from water and add it to the fuel for more efficient combustion. The system has been placed into a chopped up, lightweighted Maruti Omni. While the benefits of onboard hydrogen electrolyzers have been debated for some time, the BIT students don't plan to stop there, as their next project car will be fueled completely by hydrogen. Read more from Car and Bike. Facebook has hired Rich Heley away from Tesla. The former Tesla VP of Product Technology is making the move to the social media giant's new Building 8 research lab. Heley joined Tesla in November 2013 after working at Apple. Read more at Automotive News.