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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

Eau Rouge Lite: Infiniti Q50 gets 400-hp, twin-turbo V6

The Infiniti Q50 Eau Rouge is still (probably) dead. But as consolation prizes go, a new 400-horsepower, twin-turbocharged V6 isn't bad. The 3.0-liter biturbo will be offered in two different states of tune. Enthusiasts will flock towards the aforementioned 400-hp model, but the first VR series engine will also be sold in a 300-hp version, as well. Regardless of output, both engines have a very broad torque curve, ranging from 1,600 to 5,200 rpm with either 350 or 295 pound-feet. A Mercedes-sourced, 2.0-liter, turbocharged four-cylinder will serve as the Q50's new base engine, matching the CLA250's 208 hp and 258 lb-ft of torque. The hybrid powered Q50 soldiers on, as do a line of standard seven-speed automatic transmissions. The naturally aspirated 3.7-liter V6 appears to be gone. Another big enhancement for the updated Q50 is a revised version of the widely disliked Direct Adaptive Steer system. Infiniti says its engineers "optimized the control logic to improve feedback from the road" – a huge area of complaint with the current steer-by-wire system. The Q50's new engine lineup will be showrooms later this winter. Read on for the official press release from Infiniti, and stay tuned for more from the brand – including the new Q60 Coupe – at the upcoming Detroit Auto Show. Related Video: Infiniti Announces New 3.0-liter V6 Twin-Turbo Engine – the Most Advanced V6 Ever Offered by Infiniti • New VR-series engine becomes the lightest, most powerful, cleanest and most fuel-efficient V6 engine that Infiniti has ever offered• Two power outputs available: 400 or 300 horsepower• Series of technical innovations enhance drivability and performance• Compact layout features new integrated exhaust manifold• The 3.0-liter V6 twin-turbo engine family will first be available in the 2016 Infiniti Q50 sports sedan NASHVILLE (Dec. 15, 2015) – Infiniti's new compact, lightweight 3.0-liter V6 twin-turbo engine is the most advanced V6 engine that the brand has ever offered, striking an ideal balance between drivability, efficiency, and performance. The 3.0-liter V6 twin-turbo is an all-new engine from the new and exclusive VR- series powertrain family, born out of the brand's longstanding heritage of V6 powertrain production. The new engine has been engineered to empower the driver and offer increased power and torque and higher levels of efficiency than any comparable predecessors from the company.

Infiniti Q Inspiration Concept shows its face

Update: Infiniti released a second image of its Q Inspiration Concept with a press release about sales. We're not sure why, but we're not complaining and have added it above. The original rear three-quarter image is below in the text. Following a teaser image and some cryptic hints from designers, Infiniti has mostly revealed its concept for the Detroit Auto Show. It's called the Q Inspiration Concept, which for having "inspiration" in the name, is actually a rather uninspired name. But that's OK, because what it lacks in clever naming it makes up for in a beautiful fastback body. When the teaser was released, one of the designers mentioned the car would have a "long cabin," and that's no exaggeration, as the greenhouse reaches nearly to the tail edge of the car. It's a roofline that is highly reminiscent of the Audi A7. And as such, it would make a lot of sense for this Infiniti to be a hatchback, too, especially if it reaches production. We can't say for sure if this concept has a hatch, though, since there are some panel gaps at the base of the D-pillar and the Tesla Model 3-style rear pane of glass suggests this concept is technically a sedan. Unlike the Audi A7, the rest of the Infiniti is as curvy as the roof. There's hardly a crease anywhere, and it looks muscular with the big bulging front and rear fenders that flow effortlessly into each other. The clean exterior is accented by a lack of exterior door handles and what look to be cameras for side mirrors. The contrast to the organic curves comes from the nose and the wheels. The area where the grille would be is more chiselled and aggressive than the rest of the body. The wheels also have hard edges and lots of complicated elements that don't quite fit the organic theme of the rest of the car. Still the car overall is very striking and graceful. The press release continues to emphasize new powertrains, proportions, and the future design direction of Infiniti. As such, we suspect that this car uses, at minimum, a version of Infiniti's variable-compression engine, and more likely features extensive electrification, if not a pure EV powertrain. The lack of a large opening at the front would seem like further evidence the car utilizes electricity at some level. The car will make its full debut on Jan. 15. Related Video: Image Credit: Infiniti Green Detroit Auto Show Infiniti Hatchback Luxury Sedan 2018 detroit auto show