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First Infiniti QX30 Concept image released ahead of Geneva Motor Show

After releasing a shadowy glimpse of the rear of the QX30 Concept a few days ago, Infiniti is finally shining some light on the premium compact crossover's backside ahead of the vehicle's full debut at the 2015 Geneva Motor Show on March 3. The QX30 is a thorough reworking of the brand's Q30 Concept from the 2013 Frankfurt Motor Show. Many of the same styling elements show up on the latest luxury crossover interpretation, but the touches are tweaked to better align with Infiniti's latest look. In addition to jacking up the ride height by 1.2 inches, the CUV gets hard creases in its sheetmetal and complicated 21-inch aluminum wheels that really grab the eye. The rear wears a contrasting dark purple stripe that separates the hatch area from the exhaust tips housed in the skid plate, and both concepts share a coupe-like proportion with the backseat door pulls hidden for a cleaner line. While not pictured, the company says the vehicle has a glass roof. Infiniti still isn't showing the aluminum-trimmed front of the concept yet, but the automaker admits that the styling on display here hints at the possibility of a future premium compact crossover, which isn't really a surprise. The company has talked about a production QX30 several times in the past. First image release of strong and stylish Infiniti QX30 Concept • Concept combines elevated crossover stance with strong coupe contours • World premiere at 2015 Geneva International Motor Show • Enhanced crossover is 30mm taller than Q30 Concept HONG KONG – Infiniti today provides the first full glimpse of the QX30 Concept, which will have its world premiere at the 2015 Geneva International Motor Show. The crossover concept hints at a future premium compact vehicle and gives a strong indication of the brand's commitment to this segment. Pushing design boundaries, the QX30 Concept combines the sleek lines of a coupe with the distinguishing features and higher stance of a crossover. Looking poised for action, yet fluid, it promises to deliver effortless capability with style. "We wanted the spontaneous fluidity of the QX30 Concept design to cut through the urban clutter and rigidity, reflecting its go-anywhere and spur-of-the-moment nature," said Alfonso Albaisa, Infiniti Executive Design Director.

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.

2019 Infiniti QX50 vs. compact luxury SUV rivals: How they compare

With apologies to the EX35, or whatever it was eventually renamed, Infiniti has been without a proper, competitive entry in the compact luxury SUV segment. You know, the segment that's growing faster in sales and entries than any other? To say the 2019 Infiniti QX50 is long awaited would therefore be an understatement. At first glance and drive, the new QX50 would indeed seem to be wildly more competitive than its predecessor, which come to think of it, was eventually called the QX50 as well. This one is based on an all-new front-wheel-drive platform, and although it lacks the inherent verve of the old, rear-drive- and 370Z-based one, the resulting increase in cabin space should be a welcome tradeoff. In fact, as you'll see below, the QX50 has gone from one of the smallest compact SUVs to the most spacious. How does it stack up in every other way? Say, against the segment's four best-selling entries last year: the 2018 Lexus NX 300, 2018 Acura RDX, 2018 Audi Q5 and 2018 BMW X3. On paper at least, really well as it turns out. Let's go to the spreadsheet! Discover and compare other luxury crossovers with our Car Finder and Compare tools. Comparing engines, drivetrains and transmissions With the exception of the Acura, all of the contenders come with 2.0-liter turbocharged four-cylinder engines. As you can see, the Infiniti is the heavyweight amongst the four-bangers, boasting the most horsepower and torque. The Acura V6 nips it by 11 hp, but the QX50 is still the overall torque champ. Plus, as we documented in the QX50 first drive, the Infiniti's new VC-Turbo engine is also the most technologically advanced. The Lexus is the wimp of the group and is also the second-heaviest, which isn't exactly the ideal scenario. The Infiniti is the only one in the group to feature a continuously variable transmission. That's not going to generate much applause around here. The BMW tops the gear count with eight, while the Audi is the only entry with a dual-clutch automated manual. The Acura and Lexus have only six gears, but they're good transmissions and it's not like their fuel economy is off the pace. The Audi and BMW come standard with all-wheel drive, while the others offer a choice of front- or all-wheel drive. Comparing cargo and interior space The new front-wheel-drive platform is paying dividends inside for the 2019 QX50, as it now boasts the most maximum cargo space at 65.1 cubic feet.