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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

Cadillac tops Tesla in Consumer Reports semi-automated driving test

General Motors' Cadillac outscored Tesla in a new ranking of partially automated driving systems tested by Consumer Reports and released on Thursday. The highly influential nonprofit organization, which tests and rates a variety of consumer products from appliances to vehicles, said it compared Cadillac's Super Cruise and Tesla's Autopilot with similar systems from Nissan and Volvo. Nissan's ProPilot Assist was ranked third and Volvo's Pilot Assist fourth. Consumer Reports said it has been testing partially automated driving systems for several years but elected to conduct a formal study intended for publication, because "we are at a tipping point where they are now going mainstream," according to Jake Fisher, director of auto testing. The organization said its tests, conducted on a private track and on public roads in Connecticut, were designed to measure the systems' ability to automatically control steering and speed in certain situations, while helping drivers pay attention and regain manual control of the vehicle when required. CR noted that any of these systems can increase driving risk if used in inappropriate situations, or if drivers become inattentive or over-reliant on them. While they can help relieve driver stress and fatigue, Consumer Reports said, the partially automated systems are "not intended to be self-driving features." The systems typically use cameras, radar and other sensors, as well as mapping data, to monitor location and traffic conditions and help keep a vehicle centered in the lane at a safe distance behind other cars. Each system has limitations. Cadillac's Super Cruise, for instance, only functions on divided highways that have been mapped by GM. In contrast, Tesla's Autopilot can be used even on small, curvy roads with poor lane markings, but "operates erratically in those situations," Consumer Reports said.The organization tested Super Cruise on the Cadillac CT6; Autopilot on the Tesla Model 3, Model X and Model S; ProPilot Assist on the Nissan Leaf and Infiniti QX50; and Pilot Assist on the Volvo XC40 and XC60. Consumer Reports said Cadillac's Super Cruise did "the best job of balancing high-tech capabilities with ensuring the car is operated safely and the driver is paying attention." Tesla's Autopilot was cited for its capability and ease of use, while Nissan's ProPilot Assist did a better job than Autopilot or Volvo's Pilot Assist in keeping drivers engaged.

Nissan Note getting a little louder with Nismo versions this fall

Nissan's Nismo performance division has been getting more chances to shine recently with tuned models like the Juke Nismo RS and GT-R Nismo. But its latest creation moves closer to the bottom of the Japanese brand's lineup to make a hot hatch out of the (Versa) Note. At least in Japan, the new model is due this fall, and Nismo is keeping a lot of the details about its latest creation a secret for now. What we do know is that it'll be available in two trims – the Note Nismo and the sportier Nismo S. "The development concept of this model was to build a car that makes you want to keep driving, no matter where your destination may be," said the division's chief product specialist, Hiroshi Tamura, in the company's announcement. Aesthetically, the Note Nismo looks the way a tuned Nissan should, with the division's signature red trim outlining the car. It also wears a new, mesh grille, lower air dam, red side sills and rear spoiler. Inside, the S gets standard sport seats with full Recaro buckets as an option. Nissan didn't release technical specs for either version, but it promises that the S also gets a tuned engine with a five-speed manual. But now, allow us to burst your bubble. Autoblog spoke to Nissan North America Product Communications Director Dan Bedore about the hot Note, and he told us, "There are no plans currently for a Nismo Versa Note in the US." That's too bad; if the specs turn out to be competitive, it could be an interesting rival for the Ford Fiesta ST. Scroll down to read the official announcement. NISSAN UNVEILS THE NOTE NISMO, SCHEDULED TO GO ON SALE IN FALL 2014 YOKOHAMA, Japan (July 23, 2014) – Nissan Motor Co., Ltd. has taken the veils off the latest and sportiest iteration of the popular Note, called Note Nismo, which will reach dealer showrooms in the fall of 2014. Nissan also announced that the Fairlady Nismo will receive a minor model change, while a new Nismo RS grade will be added to the Juke Nismo in the fall of 2014. Ever since the release of the Juke Nismo in February 2013, the lineup of Nissan's specialty division, Nismo, has steadily grown. Soon after the launch of the Juke Nismo, the March Nismo, Fairlady Nismo and Nissan GT-R Nismo were added to the stable; thus allowing Nismo to offer a broad range of road-going cars to the public-from compacts to SUVs to sports cars-all armed with the sporty DNA derived from Nismo's motorsports activities. And now you can add one more to the list, the Note Nismo.