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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

This month's deals on wheels: 3 cars with incentives, rebates

On television, they come at you rapid-fire: truck deals, car deals, SUV deals. You don't have time to read the fine print, and many sound too good to be true. What follows are three deals that are both good and true. And check out our entire list of incentives and rebates. VOLKSWAGEN JETTA: With Dieselgate winding down and VW's all-new three-row SUV – the Atlas – winding up, Volkswagen is selling sedans with incentives. The Jetta remains VW's bestseller in the US. If you're looking for an immodest deal on modest transportation, you can do worse than a lease on the 2017 Jetta S. THE DETAILS: Purchase at 0.9% APR (no down payment required, available on new 2017 Jetta models financed by Volkswagen Credit, participating dealers only). At that rate, you could save $1,600 over the life of a loan. Offer ends May 1, but given the tepid market interest in sedans, incentives will probably continue through the balance of the model year. NISSAN TITAN CREW CAB: While some buyers will wait for Nissan's recently announced Titan King Cab, and commercial users will grab the regular cab and 8-foot bed, we'll recommend a lightly optioned 4X4 crew cab with standard V8 power, California-penned sheetmetal and a made-in-America footprint. Nissan's full-size pickup is finally a credible competitor in the pickup segment. THE DETAILS: With $3,500 cash back, on top of whatever deal you negotiate, Nissan is effectively reducing the window sticker of a Titan S crew cab by almost 10 percent. MITSUBISHI OUTLANDER: Some cars show up on buyers' radar, some don't. Some aren't anywhere near the radar room. Mitsubishi's Outlander is one of those. But that doesn't diminish its basic attractiveness, especially for young families looking for an affordable three-row SUV with responsive power and competitive features. Add one of the industry's longest warranties and a compelling deal, and you suddenly have reason to track down a Mitsubishi dealer. THE DETAILS: It couldn't be simpler – negotiate your best deal on a 2017 Mitsubishi Outlander, and then receive a $2,000 rebate; on a remaining 2016, it's $3,000. We'd select a fully-equipped GT 3.0S – AWC, which hooks Mitsubishi's V6 to a conventional automatic (vs. a CVT on lower-priced models) and all-wheel drive. That's a window sticker of about $34,000, and you can count on an aggressive posture by the dealer to get your business. Mitsubishi Nissan Volkswagen Car Buying Buying Guide Truck SUV Sedan

Is your new-car warranty good at the race track?

We've all heard the horror stories. Your buddy knows a girl that was dating a guy whose best friend's brother once broke his brand-new, recently purchased performance car while making runs at a drag strip or laps at a track day, and the manufacturer wouldn't cover the repair under warranty. True story? Urban legend? Complete crap? Yes, no, maybe. One thing's for sure: Automotive warranties have always come with caveats. In 1908, an ad in the Trenton Evening Times clearly stated: "All Ford Cars Guaranteed for One Year." Although it changed over time, by 1925 the Ford New Car Guarantee only covered 90 days on material and 30 days on labor, and it clearly stated that that there was "No guarantee whatever on Fan Belts, Glass, Bulbs, Wiring, Transmission, Bands, Hose Connections, Commutator Shells, Rollers, Spark Plugs or Gaskets." Whether or not Ol' Henry would pay to fix your Model T if you broke it shaving a tenth off your lap time at the local board track seems to be lost to history. We're guessing no. But what about today? Do new-car warranties in 2017 cover cars when they are driven on race tracks? We researched the warranties of 14 auto brands to find out, and the answer is yes, no, maybe, depending on the brand, in some cases the model, and whether or not your car is modified from stock. Acura has been out of the high-performance car game for a number of years, but jumps back into the party in 2017 with its hybrid-powered $173,000 NSX supercar. And Acura's warranty, as well as Honda's, clearly states that it does not cover "the use of the vehicle in competition or racing events." View 33 Photos So we asked Sage Marie, Senior Manager of Public Relations for Honda and Acura. "If the car is stock, the warranty covers it on a track just as it does on the street. No question," he told us. "However, if the car is modified, say with slick tires or other components that would put higher stresses on the vehicle's parts and systems, then we would have to investigate the circumstances further." Marie went on to say the same would be true for any Acura model or Honda vehicle, including the new 2017 Honda Civic Si. This became a common theme. Chevrolet actually started this practice with the fifth-generation Camaro on the high-performance ZL1 and Z/28 models.