2010 Infiniti G37 Awd on 2040-cars

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Watch Sebastian Vettel become first driver to lap Sochi GP circuit

In April of last year, Sebastian Vettel and David Coulthard drove the unpaved Sochi Formula One circuit in a pair of Infiniti M sedans, getting both muddy and airborne in the process. Now with tarmac laid down and fences put up, Vettel and Coulthard have gone back to the Black Sea vacation spot for another hot lap, this time in a Q50 Hybrid and without the need for mud flaps.
Sochi has earned the blessing of F1's race director, so now the next test will be the fans. With a healthy amount of wall-and-fencing along the straights, it has shades of Valencia for the viewer. We hope it will be much more exciting than its Spanish counterpart when racing happens on October 12. You'll find more videos below covering Infiniti's visits to the Sochi Autodrom, and a press release on the latest lap.

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 Infiniti QX60 Hybrid gives us d'ej`a vu

If we were totally lazy, we'd just copy and paste the text from our Nissan Pathfinder Hybrid post into this one. Why? Because the Infiniti JX35 QX60 Hybrid you see here is pretty much identical to its Nissan-badged sibling. At least, in terms of mechanicals.
But we aren't lazy... completely. Instead, let's have a quick recap. Engine: Supercharged 2.5-liter mill mated to a 15-kilowatt electric motor. Fuel economy: 26 miles per gallon combined. Interior changes: None - the battery does not compromise any sort of cargo or passenger volume. Price: Roughly $3,000 more than the standard QX60.
If you feel like the nitty-gritty details are necessary, have a look at the official press release below for all the goods. Otherwise, peruse the images in our high-res image gallery and tell us if you can spot the difference between the Q-by-60 and its Nissan twin.