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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

2018 Lincoln Navigator vs luxury SUV rivals: How it compares on paper

The all-new 2018 Lincoln Navigator is an impressive, luxury-lined beast. However, while its Black Label interior stood out most during our first drive of the new Navigator, it also seemed pretty clear that much of this full-size SUV was superior to the competition in a number of fundamental ways. Its Raptor-sourced 3.5-liter V6 had class-leading power for one, and its third-row seat seemed as spacious and comfortable as its rivals' are cramped and barely usable. To search for your next new vehicle, try Autoblog' s Car Finder. Yet, I wanted to take a closer look at how the Navigator fully compares on paper to its competitors - especially the Cadillac Escalade with which it most directly competes. The below spreadsheet should tell the whole story, but as you can see, there's an awful lot of class-leading green highlighter in the Navigator's column. The cargo volume and third-row legroom numbers are particularly telling, with the latter actually going up to 42.3 inches when you slide the second-row fully forward. Now, a few things to note about the above spreadsheet. The GLS-Class is also available as the GLS 550, which boasts a 4.7-liter V8 that just comes up short to the Navigator with 449 horsepower but has to deal with only 5,578 pounds. Its $94,950 price tag is comparable to the Navigator Black Label. Much of the LX 570's information is also applicable to the Toyota Land Cruiser, which, badge aside, could certainly be considered a member of this segment given its feature content and still-hefty price tag. It has better ground clearance and approach/departure angles than its Lexus sibling, along with an as-indicated lower price. Much of the Escalade's information also applies to the GMC Yukon Denali, while the Infiniti QX80 is applicable to the Nissan Armada. Related Video: Cadillac Infiniti Lexus Lincoln Mercedes-Benz SUV Luxury Off-Road Vehicles consumer lincoln navigator

Autoblog Podcast #344

Doug DeMuro from Plays With Cars, Infiniti Q50, Subaru BRZ STI, Porsche Macan
Episode #344 of the Autoblog podcast is here, and this week, Dan Roth and Executive Editor Chris Paukert are joined by Doug DeMuro, author of Plays With Cars and prolific internet autowriting presence. Topics include the latest spy shots of the Porsche Macan, the 2014 Infiniti Q50, and the teaser images we've recently seen of a Subaru BRZ wearing STI badges. As always, we start with what's in the garage and finish up with some of your questions. For those of you who hung with us live on our UStream channel, thanks for taking the time. You can follow along after the jump with our Q&A. Thanks for listening!
Autoblog Podcast #344: