1999 Infiniti Qx4 Base Sport Utility 4-door 3.3l on 2040-cars

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Infiniti's new VC-T changes the rules of small turbocharged engines

The upcoming Infiniti QX50 crossover does not get our pulse racing, no matter how shapely the QX Sport Inspiration concept that previews it may be. No midsize SUV does, to be fair. But it has something special under the hood – the world's first production variable-compression-ratio engine. That means the QX50's 2.0-liter turbo four, which makes 268 horsepower and 288 pound-feet of torque, will have up to 27 percent better fuel economy. Here's how it works. The trend of moving to smaller, turbocharged engines carries with it one big falsehood. Under low load when the turbo isn't needed, these engines are less efficient than an equivalent engine without a turbo because of the low compression ratio the turbo requires. That is, if you never need the extra power, you're wasting fuel. Turbocharged (and supercharged) engines use a lower compression ratio to prevent detonation. When you force extra air in a cylinder and mix it with fuel, it's more likely to prematurely go boom. Lowering the compression ratio prevents this problem, but it's less efficient. Infiniti's VC-T promises the best of both worlds, with a compression ratio that ranges from 8.0:1 for high-power turbo needs to a 14.0:1 ratio for fuel-sipping efficiency. At its heart the VC-T engine is a simple idea, but it's complicated to explain. Consider yourself warned. The photo below from Infiniti serves as a good visual overview. For the truly nerdy, this patent application covers the mechanical concept. Instead of having the pistons connected to the crankshaft, Infiniti's engine has a pivot arm with a connection on each end. One end connects to the piston, the other connects to a second lower shaft, which is controlled by an actuator arm. At any given time the engine's pistons move up and down according to the lobes on the crankshaft. But the actuator arm can change the angle of the pivot arm up and down. That is, the pistons still move in the same motion with the same stroke, but phase the entire stroke up or down. Move the pivot up and there's less room at the top, which means a higher compression ratio. Move the pivot down and the compression ratio goes down, too. As an added bonus, the lower shaft eliminates the need for counter-rotating balance shafts. Infiniti says this system works constantly and can vary the compression ratio to any number between 8:1 and 14:1. It also uses electronic variable valve timing on the intake valves to switch into Atkinson-cycle combustion for greater efficiency.

2018 Infiniti QX80 reveals fresh face in Dubai

Infiniti has finally revealed its refresh for the Infiniti QX80 at the Dubai auto show, and it's amazingly mild. Not that we were expecting a particularly wild redesign, since even the QX80 Monograph concept that previewed the SUV still looked similar to the existing vehicle, but this is still a pretty low-key update. The main changes are in the front fascia, which was teased not long ago. It features headlights that sit higher up and inline with the top of the grille. The lights are more slender and swept back, too. The tops of the fenders sit higher as well, providing a more squared-off look, and the side fender vents have a new design. Beyond the nose job, there are hardly any other changes. The taillights are new, and the chrome finish over the license plate extends into them. The rest of the roof, doors, windows, basically all the stuff in the middle of the SUV look pretty much identical to the old QX80. Underneath the skin is more of the same. The interior is the same with the exception of some new materials and colors. Apparently the shift knob is new, too. The powertrain is a carryover as well, featuring the same 400-horsepower 5.6-liter V8 with either two- or four-wheel drive. The QX80 has one other somewhat noteworthy change, and that's the price. Base price on the two- and four-wheel-drive QX80 models increases $900 over last year's to $65,745 and $68,845 respectively. The new QX80 goes on sale by the end of this year. Related Video: Featured Gallery 2018 Infiniti QX80 View 27 Photos Image Credit: Infiniti Infiniti SUV Luxury dubai motor show infiniti qx80

2022 Infiniti QX60 First Drive Review | Wading back into deep waters

NAPA, California — Standing out in a field that includes the Audi Q7, Volvo XC90 and Acura MDX is no easy task. The trio nails driving dynamics, modern style and tech to a tee, putting all the more pressure on InfinitiÂ’s long-awaited revamp of its top-selling QX60. As a sophomore effort to an SUV that lasted well past its best-by date, the 2022 Infiniti QX60 undergoes a substantial overhaul to bring it up to snuff. Does it succeed? We scored seat time in all three rows for answers. Most visibly in this image-conscious segment, the QX60Â’s fully redesigned exterior is a less fussy, more serene look than the previous one, which debuted back in 2013 as the JX35. Gone are the deeply contoured body panels, whose pinched sheetmetal and curved character lines evoked a certain (and increasingly dated) moment in InfinitiÂ’s design language history. The new QX60 flattens many of those creases, bringing a smoother, more monolithic vibe to the table. According to Infiniti senior design director Taisuke Nakamura, the update embraces the concept of “Ma,” which describes a form of Japanese minimalism. WeÂ’re not sure if NakamuraÂ’s “kimono fold” headlights or “origami-inspired” dashboard are readily identifiable as such, but the redesign is nevertheless a handsome one. The 2022 QX60Â’s redux actually gives it a stylistic leg up on some competitors. The QX60 cabin has also been reworked to become a more livable space, starting with a de-cluttered dashboard that incorporates a fully digital instrument panel, an available 10.8-inch head-up display, and a standard 12.3-inch multimedia screen that replaces an 8-inch unit (the last QX60 never got Infiniti's bizarre double-screen tech interface). Standard tech includes wireless Apple CarPlay and Android Auto, six USB ports, a revamped Infiniti Intouch app that adds greater functionality, and the industryÂ’s first integration of remote starting via Alexa voice command. Up front, the interior comes across as sleeker and modernized, with a low-profile expanse of HVAC vents forming a sweep of horizontal lines across the dashboard. Though attractive, their functionality is somewhat hampered by the need to reach into the narrow slots in order to redirect the airflow up or down.  Some of the cabin's luxury touches are a bit heavy handed, like the Autograph trim level's diamond quilting on the dash whose stitches seem thick and indelicately executed.