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Infiniti Q50 Eau Rouge portends seriously powerful future sports sedan

"If we built this car I would expect it to feature over 500 horsepower and 600 pound-feet of torque."
Eau Rouge is a notoriously difficult turn at Belgium's Spa-Francorchamps Circuit that is capable of striking fear into the hearts of the most hardened driver. Naming a car after something so terrifying, therefore, strikes us as a rather poor idea.

Infiniti Q60 Coupe spied in production guise

Here is the best news we've had all day: the production Infiniti Q60 Coupe will bear an uncanny resemblance to the concept car that previewed it earlier this year in Detroit. We know this thanks to our very first round of spy photos of the heavily camouflaged production car. Although there are only three images to draw from, we've got a clear picture of the concept-inspired lines of this new two-door. In particular, the front and rear fascias look to draw a lot of inspiration from the concept. In front, the headlights look to be similar in shape, while the double-arch grille looks largely unchanged from what the company previewed. Perhaps the biggest change up front is around the fog lights, which look to sit in far more conventional housings. Also gone is the Q60 Concept's Formula One-inspired chin, possibly in part due to the company's (and parent Renault's) perilous position as a title sponsor for the Red Bull Racing team. The taillights reinforce the concept car inspiration, retaining a similarly svelte shape and tying in with a small trunk lid. Also like the Q60 Concept, our spies report that a twin-turbocharged, 3.0-liter V6 will be on offer, likely as the range-topping engine. We'd expect the volume motor to be the Mercedes-Benz 2.0-liter, turbocharged four-cylinder found in the likes of the new Q30, as well as the CLA-, GLA-, and A-Class. It's also certainly possible that Infiniti's long-serving 3.7-liter V6 will be available in some form. Whatever engines arrive, we can expect six-speed manual and seven-speed automatic transmissions to be the sole options. Have a look at the photos up at the top of the page. And for comparison's sake, we've included the official Q60 Concept gallery down below just under the video showing a 360-degree view. Take a peek at both and let us know what you think of Infiniti's work.

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.