2003 Infiniti G35 on 2040-cars

Auto blog

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

Infiniti teases a new concept for the Detroit Auto Show

Infiniti is the latest company to join a steadily growing list of big reveals at the 2018 Detroit Auto Show. It just released a teaser image of a concept it will display. It looks fairly typical of Infiniti, with long flowing curves, and the company's signature grille. And of course, it will be painted white. The company revealed very little about it, not even a name. But a quote from Infiniti's Executive Design Director may shed a bit of light on the car. He talks about "more compact and less intrusive powertrains" giving freedom to design, and that this car has a "long cabin." This leads us to believe that this concept may feature some kind of alternative powertrain, perhaps hybrid or fully electric. It could even use a smaller version of Infiniti's variable compression engine. We also think that this car may have a profile akin to the Jaguar I-Pace, with a much more cab-forward look. When Jaguar revealed the I-Pace, it made a big deal about how going to electric propulsion gave them the opportunity to rethink what looks luxurious, sporty and aggressive, since there wasn't an engine at the front to require a long nose. Infiniti's design director's words sound pretty similar. We'll have more information and photos when the car is fully revealed at the 2018 Detroit Auto Show. Related Video: Image Credit: Infiniti Green Detroit Auto Show Infiniti Concept Cars

Submit your questions for Autoblog Podcast #344 LIVE!

We're set to record Autoblog Podcast #344 tonight, joined by Doug DeMuro, author of Plays With Cars, formerly of Porsche Cars North America, and all-around swell guy. You can drop us your questions and comments via our Q&A module below, and we'll give them extra-diligent attention. Subscribe to the Autoblog Podcast in iTunes if you haven't already done so, and if you want to take it all in live, tune in to our UStream (audio only) channel at 10:00 PM Eastern tonight.
Discussion Topics for Autoblog Podcast Episode #344
BRZ STI?