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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.

2023 Infiniti QX60 adds three-year maintenance plan, higher price

Infiniti has published pricing information for the 2023 QX60. The second-generation crossover enters its second model year on the market with price increases across the board, a handful of new features and a three-year maintenance plan called Infiniti Premium Care. Buyers still have four trim levels to choose from. Pricing for the full range (including the $1,195 destination charge) is as follows: QX60 Pure: $50,395 ($2,520 more than in 2022) QX60 Luxe: $56,445 ($2,520 more than in 2022) QX60 Sensory: $59,795 ($2,420 more than in 2022) QX60 Autograph: $63,795 ($2,420 more than in 2022) Note that those figures correspond to the front-wheel-drive QX60. Motorists who want all-wheel-drive will need to pay and extra $2,000 regardless of trim. Small updates to the list of standard features complement the price hike. Every trim level gains a wireless device charger and a frameless rear-view mirror for 2023. The Luxe model gets gloss black trim on the rear bumper, while Sensory and Autograph trims receive gray trim. Heated front seats, 18-inch wheels, a 12.3-inch display for the infotainment system and a power-operated hatch continue to come standard. Infiniti Premium Care is the final addition to the QX60 line-up. Announced in June 2022, and offered on every 2023 Infiniti model, it's an integrated maintenance plan that includes three years' worth of engine oil and brake fluid changes, tire rotations, inspections, cabin air filter replacements, tire road hazard coverage, and, on some models, car rental assistance. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.

Watch 14 hot rides take over concept car lawn at Pebble Beach

The Pebble Beach Concours d'Elegance is an annual celebration of the beautiful, old cars that grace Monterey Car Week. But Monterey – and Pebble – features lots of newer metal, too, and that includes the concept lawn at Pebble Beach. Now, "concept lawn" isn't a totally accurate name anymore, and you'll see why in the list below. This year especially, plenty of production cars can be found in the area once reserved for the conceptual. Still, we're happy to see them. Here's what's featured this year: Alfa Romeo 4C Spider Audi R8 BAC Mono Bentley EXP 10 Speed 6 BMW 3.0 CSL Hommage R Buick Avenir Galpin-Fisker Rocket Speedster Hyundai HCD-16 Vision G Coupe Icona Volcano Infiniti Q60 Lamborghini Asterion LPI 910-4 Maserati Ghibli McLaren 570S Rolls-Royce Wraith By our count, that's seven concepts out of fourteen cars. But it still makes for one hot group of metal. Check 'em out in the gallery above. Related Video: Related Gallery 2015 Pebble Beach Concept Car Lawn View 38 Photos Image Credit: Copyright 2015 Drew Phillips / AOL Design/Style Alfa Romeo Audi Bentley Buick Infiniti Lamborghini Lincoln McLaren Porsche Concept Cars Videos Original Video Pebble Beach