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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

Nissan recalls over 120,000 Altimas due to... spare tire inflation?!

A pressure regulator that over- or underinflated spare tires for five days earlier this year has led to a recall of 123,308 units of the 2013 Nissan Altima. Sedans that were manufactured from March 21-26 are those possibly affected by the temporary tire snafu, the recall for which will begin on May 3.
Those notified of the issue can take their sedans to their local Nissan dealer, who will check the tire pressure and correct it if necessary, but we imagine owners can probably just whip out a tire gauge to check and adjust the inflation for themselves. Should you need it, there's an official notice from the National Highway Traffic Safety Administration below with a few more details.

2013 Nissan Pathfinder: March 2013

Over the past few months, we've talked a lot about how our long-term 2013 Nissan Pathfinder functions as a daily-driver, long-hauler and all-weather warrior. And so far, it's earning high praise from most of us for being a well-rounded, pleasant vehicle in these regards. But the vast majority of people who actually go out and buy a Pathfinder will do so because of its people-and-stuff-carrying abilities. Nissan specifically engineered the new Pathfinder to be a softer, more widely appealing crossover than the sort of rugged SUV that it was before, and in doing so, the company is hoping its new CUV will find homes in the garages of many American families.
We needed to get some family impressions of the new Pathfinder, and fast.
Thing is, many of us Autobloggers live the kid-free life - at least that's true of most of us in the Detroit area where the Pathfinder currently resides. We have no doubts that the Pathfinder will get a proper family road trip workout from west coast editor Michael Harley after it shuffles over to the left side of the country, and it might also do a jaunt to North Carolina this summer with executive editor Chris Paukert and his family before it leaves the area, but in the meantime, we needed to get some family impressions of the new Pathfinder, and fast.