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Infiniti Q80 Inspiration concept is bringing its sexy back to Paris

A little over a month ago, Infiniti hinted at a new concept car it was apparently lining up for the upcoming Paris Motor Show. Then a few weeks ago it showed us a little more. But now, we're getting our best look yet at the new showcar.
Called the Q80 Inspiration, the concept takes the form of a four-door fastback - something along the lines of the Porsche Panamera or Audi A7, but with Infiniti's signature swoopy lines. Created to serve as "a design and technological highlight to which Infiniti's four worldwide design studios will refer regularly in coming years," the Q80 Inspiration may be more design study than pre-production prototype. But the concept is to be taken, according to the statement below, "as clear intent to have an entry into the newly defined premium fastback segment."
Incrementally larger than the Panamera in every dimension but height, the Q80 features a teardrop greenhouse, with four doors opening "portal style" into a four-seat cabin done up in carbon fiber, aluminum and leather. Watch this space for more as Infiniti continues the gradual reveal of its new show car as its debut in Paris approaches apace.

Infiniti keeps us on our toes for Q50 Eau Rouge

If you've been watching the evolving rapprochement between Infiniti and Red Bull Racing, and have wondered what the point was if the Japanese automaker didn't capitalize on its expensive collaboration with the world-champion Formula One team, then Infiniti may finally have the answer come the Detroit Auto Show next month.
That's where Nissan's premium division is set to unveil the Q50 Eau Rouge concept, a show car set to showcase its F1 involvement in the form of a jazzed-up sports sedan. We still don't have much to go on in terms of what the concept car will actually entail beyond a body kit, but Infiniti has launched a dedicated website for the reveal and with it, this teaser video. It still doesn't tell us much, but it's a cool animation just the same, so check it out below.

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.