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Infiniti's fastback 2021 QX55 crossover shows its stylish rear end

First announced in August 2019, the Infiniti QX55 will finally make its global debut on Tuesday, November 17. Nissan's luxury division released a preview image that gives us the best look yet at the next addition to its range. The QX55 is closely related to the QX50 crossover under the sheetmetal, but it stands out from its more family-friendly sibling with a rakish, fastback-like roofline that will inevitably attract the coupe label. It will be to the QX50 what the BMW X4 is to the X3. Although we haven't seen its front fascia yet, Infiniti's preview image shows the rear end wears horizontal LED lights that stretch deep into the quarter panels, along with a roof-mounted spoiler. We were pleasantly surprised by the QX50's upmarket interior, so we're expecting a comparable degree of opulence in the QX55. It's too early to tell if Infiniti will simply copy the 50's cabin layout and paste it inside the 55, or if the latter will receive a look of its own. Similarly, technical specifications won't be published until the model's introduction. We expect that the VC Turbo four-cylinder engine, which was a finalist for the 2019 Autoblog Tech of the Year award, will appear on the roster. All-wheel drive will certainly be available, and Infiniti may offer an entry-level variant with front-wheel drive. Infiniti will present the 2021 QX55 online Tuesday during an event that will star singer Aloe Blacc. It will stream the concert-unveiling cross on its various social media platforms starting at 8:55 p.m. Eastern time, 5:55 p.m. Pacific time. Built in Mexico, the model will arrive in American showrooms in early 2021 with a base price pegged above $40,000. What's next? The QX55 will stand out as the first model released under Infiniti's Nissan-Plus strategy, which was presented as a way to cut costs and boost profits by increasing the number of components it shares with its parent company. However, leaning more heavily on Nissan will not dilute its image or its products, according to executives. Stylists are in the process of overhauling Infiniti's design language, and the brand's reboot will put a major emphasis on technology. Looking ahead, the QX will be followed by the next-generation QX60, which is tentatively due out in 2021 as a 2022 model, and by the company's first series-produced electric car. Related Video:

Production Infiniti QX50 will mostly look like the concept

At this year's Detroit auto show, we got a look at the nearly production-ready Infiniti QX50 concept. Now we get our first look at how close to production the concept was, thanks to new spy photos. The overall shape remains very similar to that of the curvy concept. However, the greenhouse looks taller with more glass. While it isn't quite as low and aggressive-looking, we're sure drivers will appreciate the small compromise for better visibility. At the front, there are more changes that are a little less subtle. The grille looks a bit smaller all around, and even looks a tad lower than the concept. The headlights also don't stretch as far back, and they aren't as narrow either. In the front bumper, the two side scoops of the concept have been significantly toned down, and now look like more traditional grilles that follow the shape of the bumper. The lower grille is more open with just a mesh insert instead of the concept's skidplate-style chrome bar. Moving to the back, we find the taillights look nearly identical to the concept's. They're very long and narrow, and they connect into a metal crease that looks a bit like a spoiler. It looks as the though the faux skidplate treatment on the rear bumper will also make it to production, but the integrated exhaust tips have given way to more conventional round tips in bumper cutouts. It also may have lost the concept's air vents on each side of the hatch. Though they may have also just been toned down enough that they don't show through the camouflage. When the QX50 hits dealers, it will be available with Infiniti's fascinating variable compression four-cylinder making 268 horsepower. The crossover will also feature a version of Nissan's ProPilot semi-autonomous technology, which has been implemented in the Nissan Serena minivan in Japan. We expect to see the fully revealed production model very soon, possibly by the end of the year. Related Video:

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.