1996 Infiniti J30 Base Sedan 4-door 3.0l 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.

Infiniti teases the next generation QX80 SUV

Our latest teaser ahead of the New York Auto Show comes to us from Infiniti. The company didn't reveal anything more than a name, the QX80 Monograph, and the single picture seen above. However, we can determine a few things from this tidbit of information. First, Infiniti is teasing a vehicle that will represent the upcoming successor to the current QX80 SUV, albeit in concept form. Second, the SUV is going to see a fairly significant redesign. The headlights are now lined up with the top half of the grille rather than the bottom, and the tops of the fenders are higher. This provides a more aggressive, square-shouldered appearance. The lower vents and front spoiler look more aggressive, too. The SUV will be fully revealed on April 11 in time for the New York Auto Show, as will more details about the vehicle. At that point we should know if this is a completely new vehicle, or a substantial refresh of the current Nissan Patrol-based SUV. Related Video:

Infiniti QX80 refreshed for 2015, range-topping Limited trim added

Alongside the updated Q70, Infiniti has refreshed its fullsize SUV, the QX80, for the 2014 New York Auto Show. Like its freshened sedan, the QX80 is full of incremental styling tweaks typical of a mid-cycle update like this. Also like the Q70, there's a new member of the QX80 family for the 2015 model year.
But first, the overarching changes for the QX80 range. As we said, this is pretty standard fare, with new headlights and taillights and a restyled grille designed to fit the full-sizer in with the most recent Infiniti design language. Full LED headlights, turn signals and fog lights should provide a bit more illumination, while the mesh inserts on the "double-arch" grille remind us of the Q50. Still, this is a rather bulbous, inelegant piece of design in our eyes. Out back, the shape of the taillights has been tweaked, and they now sport LED illumination. The new rear bumper is larger, as well.
In the cabin, upgrades are similarly sparse. There are a few new tech items, like automatic high beams and predictive forward collision warning. Overall, though, this is the same wood-and-leather-lined cabin Infiniti has been selling for the past few years.