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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

2016 Infiniti Q50 Eau Rouge Prototype [w/video]

It only takes about half a lap of the Millbrook Proving Grounds for me to become convinced that Infiniti must build this car.
The sedan I am piloting around the English circuit is a working prototype of the Q50 Eau Rouge Concept that made its world debut at the 2014 Detroit Auto Show earlier this year. As a refresher, the exquisitely painted, burgundy metallic, four-door show car is based on the production Q50, enhanced with Infiniti Red Bull Racing-inspired carbon-fiber bodywork, aerodynamic upgrades and - as we would come to learn at the Geneva Motor Show a few months later - fitted with a beastly twin-turbocharged engine shared with the parent company's spectacular Nissan GT-R.
Despite lacking the concept's gorgeously expensive paint, the vinyl-wrapped red prototype seen here is much more appealing than the static concept, as it is mechanically complete - it can be driven - thus explaining why I have traveled one-third of the way around the world to test this enthusiast-tuned, one-of-a-kind machine at one of Europe's premier testing facilities.

1992 Infiniti Q45 with under 9,000 miles is a window into the glory days of Japan, Inc.

The 1980s saw Japanese auto boom in the U.S., while at home the "Bubble Economy" of the latter half of the decade swelled corporate coffers. The heady atmosphere lead first Honda, then Toyota and Nissan, to launch luxury divisions, aimed primarily at the U.S. market. Nissan formed a secret task force in 1985 to create Infiniti, and the brand launched (simultaneously with Lexus) at the 1989 Detroit Auto Show. The Infiniti Q45 was the brand's flagship and displayed a distinctly Japanese take on the luxury sedan. Whereas the Lexus LS400 was like the world's most perfect Cadillac — all silence and smoothness — the more driver-oriented Q45 was something akin to an Asian Jaguar. The Zen-like styling eschewed luxury car cliches such as interior wood trim and a fancy chrome grille. Instead, the nose of the Q45 was adorned with a stylized badge that was suggestive of a samurai shield. When Lexus stormed out of the gate and left Infiniti far behind, Nissan's luxury division began to dial back the iconoclasm and tack toward conventionality. All of which makes this early, 1992-model Q45 a rare and intriguing machine. It's all the more representative of Infiniti's early days because of its ultra-low mileage: just 8,800 miles are on the clock. Up for sale right now on the auction website Cars & Bids, this Q45 reportedly had just one owner up until last year. It features a leather interior, power seats, a sunroof and a trunk-mounted 10-disc CD changer. Under the hood is a DOHC 4.5-liter V8 that's good for 278 horsepower and pairs with a four-speed automatic transmission to drive the rear wheels. Of note is the factory case that houses the original titanium keys. At this writing, bidding for this rarely seen Japanese luxury sedan stands at $11,000 with two days left to go in the auction. That seems a small sum for such a well-preserved totem of the Japanese auto industry's master-of-the-universe period. Related Video: