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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.

2022 Infiniti QX55 Review | Price, performance, size, comparisons with QX50

Carmakers love calling them coupes, but as they have four doors, that's still a tough sell for our dictionary. So, let's go with fastback SUV for now, and say that the 2022 Infiniti QX55 is one of the best-looking examples of the growing bunch. Even if Infiniti wasn't originally intending to lop off the back of its QX50 compact crossover, the afterthought project to turn it into the QX55 was nevertheless a successful one. When parked next to a BMW X4 or Audi Q5 Sportback, we know the QX55 would do the prettiest job sprucing up the driveway. It's nicely proportioned and tastefully detailed with just a hint of Infiniti's forever cool FX SUV at the rear. The interior is also interesting to behold and pleasing to touch. Unfortunately, the QX55's aesthetics are its main selling point. Driving it is a real letdown as its underwhelming handling and soul-sucking continuously variable transmission just aren’t up to snuff for a luxury model. It makes the QX55 feel like you're driving a Nissan Altima. And even if you're less concerned with a car's driving dynamics, the QX55's odd and antiquated tech interface is sure to be a put-off after seeing what BMW, Audi and Mercedes have to offer. Of course, all of this could be said of the QX50. At least the QX55 has aesthetics on its side.   What's new for 2022? The QX55 is an all-new model, although the QX50 upon which it's based has been around since 2019. 2022 Infiniti QX55 View 25 Photos What's the QX55 interior and in-car technology like? The QX55 interior is a highlight. ItÂ’s lifted from the QX50, and thatÂ’s good. ItÂ’s just as flowy as the exterior, and on our Sensory trim level test car, it was fitted with sumptuous red and black leather on nearly every surface, plus some natural-finish wood trim across the dash and doors. Lower trim models arenÂ’t quite as flashy but still feature the same attractive design. It's all suitably elevated for a luxury car. On the other hand, the dual-screen infotainment system is at best bizarre and at worst antiquated.  Most infotainment functions are accessed and operated via the touchscreen at the bottom of the stack. That placement makes it easy to reach but hard to see. The top screen controls the navigation system and Apple/Android integration, is of a noticeably lower resolution, and is controlled either by touch or with a control wheel on the center console next to the shifter.

2015 Infiniti Q70L

A quick look at a scatter plot that charts rear legroom against luxury sedan MSRPs reveals a dearth of spacious bargains - few, if any, luxury sedans offer exceptionally spacious rear accommodations at a relatively low starting price. To fill the vacuum, Infiniti has made its Q70 available in a Q70L variant - in English, long wheelbase - for 2015.
The artist formerly known as the Infiniti M has been available in stretched-out form in the Chinese market for two years, and the US introduction is accompanied by several updates that include slightly reworked styling cues, and refinements to the drivetrain and chassis. The Q70L's wheelbase extends 5.9 inches (with a commensurate expansion of knee room), while overall length increases to 202 inches, a 7.3-inch bump. Powertrain options include a 3.7-liter V6 which produces 330 horsepower and 270 pound-feet of torque (starting at $51,350), or a 5.6-liter V8 that yields 420 hp and 417 lb-ft (and climbs to $64,550). The long-wheelbase treatment adds $1,500 to Q70 MSRPs. Not surprisingly, the Hybrid version is not available with the L treatment.
Up to three Q70L rear passengers are treated to reading lamps, a 12-volt power outlet, rear door close assist, and available heated seats. Unlike its Far Eastern counterpart (and competitors like the $61,500 Hyundai Equus), the US-spec Q70L's rear seats don't recline. Bummer.