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2014 Nissan Pathfinder Hybrid

If you've been keeping up with our long-term 2013 Nissan Pathfinder coverage, you already know that, generally speaking, we dig it. After racking up 21,000 miles (and climbing!) on our dear Sweet Brown, we've become very, very familiar with the Pathfinder package as a whole, and many of us actually prefer it over competitors like the Ford Explorer and Chevrolet Traverse.
For 2014, Nissan has added a new hybrid option for its Pathfinder, using an all-new powertrain that will also be shared with the CUV's Infiniti-badged QX60 sibling. As far as fuel economy is concerned, our long-term Pathfinder has had no problem hitting its EPA-estimated numbers of 19 miles per gallon city and 25 mpg highway, but this new hybrid model is said to be good for an increase in overall economy - 25/28 mpg (city/highway) when equipped with front-wheel drive and 25/27 mpg with optional four-wheel drive.
We recently took the 2014 Pathfinder Hybrid for a quick spin around the city streets of Nashville, TN. And while our time with the non-hybrid Pathfinder has been pretty enjoyable overall, at first blush, we're having a tougher time warming up to this electrified variant.

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.

Meet the Nissan GT-R test driver responsible for 'Ring tuning

Ever wonder what it's like to be a manufacturer's development driver at the Nürburgring? We imagine it's pretty cool. After all, you get to spend your days zooming about the greatest racetrack on the planet in a vehicle that is usually months or more away from consumers. For Hiroyoshi Kato, whose actual title is Technical Meister, life is even better than your typical development driver, because he spends his days wringing out the Nissan GT-R Nismo around the Green Hell.
Kato-san has a long history with both Nissan and the Ring. He had a major hand in the development of the R32, R33 and R34 Skyline GT-Rs, having first come to the Ring nearly three decades ago.
His experience with the Nismo, though, is different than the other vehicles he's contributed to. As he explains it, there are real racers on hand to test the car on the track, like Formula One reserve driver Sébastien Buemi. Instead, Kato focuses on the track-to-road balance. Still, he has some truly interesting insights on the car and the track, including his surprise at turning a sub-eight-minute lap in his first outing. That, along with a few other things (one of which is an R34 being hustled about), make this a must-watch video from Nissan.