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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

MotorWeek proves '90s were awesome with Supra, Stealth, RX-7, Corvette, 968, 300ZX comparo

Oh, the heady days of 1993, back when the Clinton Presidency was just getting underway, and it seemed like every hot new rock band was coming out of Seattle. Sports cars in the US had finally shaken off the shackles that slowed them during the '70s and '80s, and you could buy any number of legitimately quick vehicles again. MotorWeek recently went digging into its archives to find this six-model test from 1993 showing off some of the best semi-affordable performance coupes that money could buy at the time, and it's priceless.
Featuring the 1994 model year Toyota Supra in twin-turbo guise and MY 1993 versions of the Porsche 968, Nissan 300ZX TT, Mazda RX-7, Dodge Stealth R/T Turbo and Chevrolet Corvette LT-1, MotorWeek definitely covered all of the bases. One thing that might surprise younger readers is these cars' performance. The video only provides 0-60 acceleration times, but several of these vehicles would still be considered pretty potent today - over 20 years since going on sale. The Supra is especially impressive, hitting 60 miles per hour in just 5 seconds. Even today, that's nothing to sneeze at.
Given their performance potential and still-attractive looks, it's amazing that some of these coupes are old enough to drink now. The progress of interior design and safety equipment in the intervening years is pretty shocking, though. In most of these models, having two airbags is touted as a big deal. Scroll down to watch a Throwback Thursday blast from the past about some of the '90s best sports cars.

Renault-Nissan alliance reboot will kick off with five projects

Renault SA and Nissan Motor Co. are moving ahead with a plan to recalibrate a two-decades-old alliance that had weakened over time, starting with a range of industrial projects alongside an agreement to rebalance capital ties, according to people familiar with the situation. Top executives from the alliance partners held an operating board meeting on Thursday, giving a nod to bringing Nissan and Renault’s cross shareholdings to an equal level, as well as common projects as part of the reshaped cooperation, the people said. The partners also agreed on an alliance event to be held on Feb. 6 in London to present details of the plans, the people added, declining to be named discussing details before they are public. Under the landmark plan, Renault is expected to cut its 43% stake in Nissan to 15% via an orderly disposal of shares over time to eliminate lopsided capital ties that have been a source of friction for years. The tentative agreement comes after years of tension that at one point spilled over into Japanese-French politics when Renault-NissanÂ’s then-leader Carlos Ghosn weighed to merge the two companies.   The partners also agreed to continue collaborating on various industrial projects, a condition that was crucial for Renault to obtain approval for the rebalancing from its most powerful shareholder, the French government. Media representatives for Renault and Nissan declined to comment. The boards of directors of the respective companies will have to approve the agreement in meetings to be held in coming days, the people said.  Code name: ‘ReloadedÂ’ The redesigned alliance will allow Chief Executive Officer Luca de Meo to move on with a complex split of Renault into five separate businesses, including carved-out electric-vehicle business Ampere and to deepen ties with a series of other partners, including ChinaÂ’s Zhejiang Geely Holding Co. and Qualcomm Inc., the people said. “The interest for each of the partners is now to be able to move forward without, for example, RenaultÂ’s management getting distracted in endless trans-national politics,” says Stifel analyst Pierre-Yves Quemener. Failure of the talks would have been “a negative,” Quemener said.  Renault, Nissan and junior partner Mitsubishi Motors Corp. will embark on roughly five projects initially, codenamed “Reloaded,” with others to follow, the people said.