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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.

Pebble Beach Concept Car Lawn adds class to the grass

While Pebble Beach is traditionally thought of as the refuge of the pristine and pricey vintage vehicles of the world, there's no shortage of newer vehicles on display. And when we say "new," we mean really new. As in, not even in production new. This is the concept car lawn, and it's home to an eclectic group of vehicles from past and present.
Of course, calling it the "concept car lawn" is a bit of a misnomer this year (as it has been in previous years, too). Production models like the Alfa Romeo 4C were on display, alongside known quantities like the Hennessy Venom GT and modified versions of already-on-sale models, like the Rolls-Royce Phantom Drophead Waterspeed Collection.
There were a few concepts on display, though. Toyota debuted the critically acclaimed FT-1 Concept in a new shade, while BMW's Beijing Motor Show stunner, the Vision Future Luxury, was also parked on the expensive grass. Also appearing were the Nissan GT-R in sheep's clothing, the Infiniti Q50 Eau Rouge, and the recently debuted McLaren P1 GTR.

2021 Infiniti QX50 adds new features and a blacked-out appearance package

The 2021 Infiniti QX50 is out, and Infiniti has made a couple changes of note. Most of them are equipment related, but the luxury crossover’s price is going up this year, too. A base QX50 Pure is $700 more expensive this for 2021, with the new total being $38,975. That gets you the front-wheel-drive model. If you want all-wheel drive, thatÂ’ll be another $2,000. For your extra coin, Infiniti has added a Wi-Fi hotspot, acoustic laminated front side glass, rear seat-mounted side-impact airbags and a new automatic emergency call system for when the vehicle is involved in a collision. All those features are standard across every QX50. More features are also added to the $42,525 Luxe trim as standard equipment. You now get heated front seats and ProPilot Assist. ThereÂ’s also a new $1,200 Appearance Package that is exclusively available on this trim. It adds 20-inch black-painted wheels, black mirror caps, black mesh grille, dark chrome exterior accents and a graphite headliner. Photos of this package can be seen in the monochromatic montage below. The price increases can be seen across the whole line. Even the Autograph (top trim) is up by $350 this year to $55,225. Tiny equipment bumps come along with these price increases. For example, the Essential trim adds the head-up display for no cost, and the Autograph trim adds InfinitiÂ’s Direct Adaptive Steering system. The 2021 QX50 is in dealers and on sale now. Related Video: