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Infiniti Q60 Concept previews sexy styling, twin-turbo V6

Okay Infiniti, this was worth the waiting and teasing. Behold, the Q60 Concept, the coupe that foreshadows a future production two-door while also introducing a new family of 3.0-liter, twin-turbocharged V6 engines. It's fair to say we like it very much. Of course, this is not our first unfettered look at the Q60 Concept. Infiniti's final "teaser" image showed off the final product, but now we can analyze it from all angles, including the lovely, almost S-Class Coupe-like rear end and the clean, fashionable cabin. The Q60 Concept's design, particularly in the swoopy profile, comes across as organic and muscular, particularly in the shape of the front fenders and rear haunches. The car's dead front view reveals a few styling details that were overshadowed by the angle of the teaser image, like the interesting ridge that runs from the grille into the powerfully domed hood. A fixed glass roof gives the cabin an open-air feel, while the overall layout is largely reminiscent of the current Q50 sedan, only with cleaner, updated materials that we wouldn't bet on making production. Thin sport seats look supporting and feature quilted leather bolsters, while a two-tone steering wheel spices up the driving environment. Under the Q60 Concept's hood is the same 3.0-liter, twin-turbocharged V6 that was first shown on the Q80 Inspiration Concept from the 2014 Paris Motor Show. According to Infiniti, the direct-injected six-pot will arrive in a production car within the next two years. In the Q60, a seven-speed automatic handles power delivery, although it's unclear if a similar gearbox would be used alongside the production engine. Other notable features on this sleek two-door include Infiniti's Direct Adaptive Steering system and the new InTuition system, which promises a "fully customizable digital environment." Of course, we'll have much, much more on the Q60 Concept tomorrow, when it makes it arrives on the floor of the 2015 North American International Auto Show in Detroit. Scroll down for the full press release from Infiniti. January 11, 2015 Infiniti Q60 Concept: Fusing exhilaration and power - Infiniti's precursor to a high-performance sports coupe - Unique proposition of striking styling and high-output powertrain in a premium package - Previews new family of powerful and efficient engines Hong Kong/Detroit – Infiniti has set out to captivate the imagination and exhilaration of sports coupe fans with the stunning Q60 Concept.

Infiniti Pebble Beach retro concept is a '50s-inspired electric grand prix car

Infiniti will debut a retro-inspired race car at next week's Pebble Beach Concours d'Elegance that combines the style of classic grand prix open-wheel cars with modern design elements and powertrains. The car should fit right in at Pebble Beach alongside all the vintage machinery from the early days of motorsports. Simply dubbed the Infiniti retro prototype, it is Infiniti's idea of what could have been. Basically, the Japanese automaker imagined that it found a car hidden away for 70 years in southern Japan. They took that old look and married it with the brand's "Powerful Elegance" design language. We only have a couple of photos, but it looks like a sleek silver bullet with narrow-section bias-ply tires. We'll have to wait until next week to see the entire thing, but this teaser has us excited. As expected with any modern concept, the retro prototype eschews an awesome multi-carb gasoline engine in favor of Infiniti's EV technology. It's unclear if the car actually runs, but we'd all love to see this put some laps down at nearby Mazda Raceway Laguna Seca. Related Video:

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.