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New details emerge on Inifiniti QX50’s unique new variable-compression engine

Infiniti will release the world's first production variable-compression engine when it releases the 2019 QX50 midsize SUV sometime next year. Now we have some new details on the innovative new engine, which Infiniti is calling VC-T, for Variable Compression Turbo, after the luxury brand offered a prototype test drive. We wrote extensively about the complicated technology underpinning the new engine last year. It's the latest novel development that could represent a range-extender, if you will, for the embattled internal combustion engine in an era when automakers and governments are shifting their focus to electric vehicles. The VC-T is a new inline-four, 2.0-liter that combines the power of a high-performance turbo gasoline engine with the torque and efficiency of an advanced diesel engine, but without the latter's notorious emissions. It features the ability to seamlessly raise or lower the stroke of the pistons in the combustion chamber, depending on the driving conditions it detects and inputs from the driver, to select the best compression ratio—anywhere between 8:1, typical for high-performance engines, and 14:1 for high efficiency. In essence, it delivers the performance of a V6 but is much more efficient, with improved fuel efficiency of between 10 to 15 percent with its best competitors, per Car and Driver. You can view how it works in motion via the video below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. It's also quieter, more lightweight and compact than V6 engines with comparable power outputs, estimated at 268 horsepower and 288 pound-feet of torque. In a prototype test drive, Car and Driver writes that the engine "felt very conventional" and responsive, with strong and smooth acceleration. "The only indication you have that the compression ratio is changing is from an indicator in the instrument cluster next to the boost gauge." The engine is expected to deliver fuel economy gains of 27 percent in combined city-highway EPA rating over the outgoing QX50, which had a 3.7-liter V6. The 2019 model, fitted with the VC-T, should get about 26 mpg in combined fuel economy, and it will get to 60 mph almost one second faster than its four-cylinder counterparts, Nissan's chief powertrain engineer, Shinichi Kiga, told Automotive News. The VC-T engine is the result of 20 years of development spanning more than 100 prototypes and around 300 patents at Nissan.

Upcoming QX80 will use current model's platform, powertrain

Infiniti previewed the next-gen QX80 full-size SUV at this year's New York Auto Show with the QX80 Monograph concept. The new model is slated to go into production by the end of this year. Despite the updated look, Motor Trend reports that the next QX80 will ride on the same platform as the current model, carrying along with it the 5.6-liter 400 horsepower V8. The current QX80 shares a platform with the Nissan Patrol globally and the Nissan Armada here in the US. The model has been a success for the automaker, outselling every other Infiniti but the smaller QX60 crossover and Q50 sedan. Though the platform dates back to 2010, it seems Infiniti doesn't want to spoil a good thing. Competition like the Mercedes-Benz GLS-class, Cadillac Escalade, and Lexus LX are about as old as the current QX80. While most new models are more refined than their predecessors, Infiniti Motor Company President Roland Krueger says it should drive about the same as the current model. While the V8 will carry over, Krueger didn't rule out the possibility of a smaller turbocharged V6 for the future. Also carrying over will be the independent, self-leveling rear suspension, though neither the QX80 or Armada get some of the Patrol's really good off-road components. Since there isn't much going on beyond the skin, expect a short development cycle and a full debut sometime this fall. Related Video: News Source: Motor Trend Design/Style Infiniti SUV infiniti qx80 infiniti qx80 monograph

Infiniti boss ices plan for EV

Infiniti President Johan de Nysschen has postponed plans for an electric vehicle in order to focus on high-volume models. Automotive News reports de Nysschen is attempting to be realistic about Nissan CEO Carlos Ghosn's goal of nearly tripling Infiniti global sales from 170,000 units last year to 500,000 by March 31, 2017, saying, "500,000 cars by 2017 is an inordinately ambitious challenge." An electric vehicle would likely sell in rather small numbers.
Still, the executive is already making moves to improve Infiniti sales worldwide with new production in both China and England. Meanwhile, the company plans to unveil a new volume compact sedan set to bow in 2015. Meanwhile, de Nysschen is also working on two new models above the company's current M line. Those will borrow styling cues from machines like the Essence Concept, but will be far less exotic, tilting more toward high-performance luxury than true sports car.