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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

Production Infiniti QX50 will mostly look like the concept

At this year's Detroit auto show, we got a look at the nearly production-ready Infiniti QX50 concept. Now we get our first look at how close to production the concept was, thanks to new spy photos. The overall shape remains very similar to that of the curvy concept. However, the greenhouse looks taller with more glass. While it isn't quite as low and aggressive-looking, we're sure drivers will appreciate the small compromise for better visibility. At the front, there are more changes that are a little less subtle. The grille looks a bit smaller all around, and even looks a tad lower than the concept. The headlights also don't stretch as far back, and they aren't as narrow either. In the front bumper, the two side scoops of the concept have been significantly toned down, and now look like more traditional grilles that follow the shape of the bumper. The lower grille is more open with just a mesh insert instead of the concept's skidplate-style chrome bar. Moving to the back, we find the taillights look nearly identical to the concept's. They're very long and narrow, and they connect into a metal crease that looks a bit like a spoiler. It looks as the though the faux skidplate treatment on the rear bumper will also make it to production, but the integrated exhaust tips have given way to more conventional round tips in bumper cutouts. It also may have lost the concept's air vents on each side of the hatch. Though they may have also just been toned down enough that they don't show through the camouflage. When the QX50 hits dealers, it will be available with Infiniti's fascinating variable compression four-cylinder making 268 horsepower. The crossover will also feature a version of Nissan's ProPilot semi-autonomous technology, which has been implemented in the Nissan Serena minivan in Japan. We expect to see the fully revealed production model very soon, possibly by the end of the year. Related Video:

Infiniti Q30 is the company's first small hatchback

Well, here it is. Despite every attempt to show us the car via teasers, Infiniti has made it to the week of the Frankfurt Motor Show before introducing the all-new Q30, the company's version of the jointly developed Mercedes-Benz A-Class hatchback and the first compact from the Nissan-owned luxury marque. The Q30 will be available with a wide and varied array of gas and diesel powertrains for its appearances in other markets. There will be two 1.6-liter gas engines, in 120-horsepower and 154-hp varieties, and two diesels. The oil-burners, which will not be coming to the US, displace 1.5 liters and 2.2 liters, respectively. As for North America, the Q30 will follow in the footsteps of its Mercedes cousins, the CLA- and GLA-Class, and offer a single 2.0-liter, turbocharged four-cylinder with 208 horsepower and 258 pound-feet of torque. Although it displaces just as much as the CLA's 2.0-liter turbo and matches that car's output, enthusiasts will appreciate the six-speed manual transmission being offered alongside the Mercedes seven-speed, dual-clutch automatic. Say what you will about its Mercedes roots, but Infiniti's decision to offer a six-speed stick here in the US should be respected. The specific set of drive wheels isn't mentioned, although if the A-, CLA-, and GLA-Class are any indication, the Q30 will offer standard front-wheel drive and optional all-wheel drive. That's speculation on our part, but it's a logical assumption. The Q30 has retained the A-Class' front McPherson struts and rear multi-link suspension arrangement. But while it uses an identical design, Infiniti has tuned the shocks to its own specification. Depending on trim, the Q30 will ride on either 18- or 19-inch wheels. Speaking of those trims, there are three of them. The base trim is, um, basic – Infiniti spilled very little ink on the entry level model. In fact, aside from a few simple descriptions, equipment details on the other two trims are quite scarce. Choosing the Premium line will net you unique 18-inch wheels, LED fog lamps, heated door mirrors with body color housings, and twin chrome exhausts. The Sport brings a bit more to the table, making a functional change by lowering the ride height by 0.6 inches and fitting 19-inch alloys. Gloss black and dark chrome accents on the more aggressive front and rear fascias round out the exterior enhancements.