2011 Nissan Maxima on 2040-cars

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Nissan Juke-R [w/video]

The Other Brother
The handler strapped into the carbon fiber race bucket next to me is the only other person outside of yours truly who looks like he thinks this is a bad idea. I've just finished situating myself in the cabin of the very first Nissan Juke-R ever constructed. There are literally thousands of man hours in this single prototype and only four examples of the car total in the entire world. Each one carries a price tag of around $656,400 at current conversion rates, making this both the rarest and most expensive piece of machinery anyone has ever let me get close enough to sniff, let alone drive.
And that's exactly what I mean to do.

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.

2014 Nissan Serena offers big flexibility in a tidy package

In America, Nissan attempts to slake our kinschlepping needs with its slow-selling Quest minivan, but in Japan, where consumers seem a lot less reluctant to buy MPVs, there are a lot more models for every size family and budget. Nissan itself offers no fewer than six such minivans, including the popular Serena seen here.
Technically a mid-cycle facelift, this new Serena continues to offer seating for up to eight people with a gas-only or mild hybrid driveline delivering power to either the front or all four wheels. This Tokyo Motor Show reveal takes that familiar package and lends it a freshened look, complete with a revamped front fascia with less chrome frosting, optional LED headlamps, new LED taillamps and new alloy wheel patterns. In addition, the Serena receives new active safety technology, including lane departure warning systems, Around View Monitor with Moving Option Detection, Driver Attention Alert, and so on.
With only a 2.0-liter four-cylinder engine paired with a continuously variable transmission, you might expect the Serena to be smaller than today's American minivans, and you'd be right - it's roughly the size of a short-wheelbase Gen III Dodge Caravan, making its seating capacity particularly impressive. Said another way, the Serena is likely to stay forbidden fruit, but that doesn't mean you can't enjoy it in our gallery.