2006 Infiniti G35 Base Sedan 4-door 3.5l on 2040-cars
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Infiniti's new VC-T changes the rules of small turbocharged engines
Sun, Aug 14 2016The 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.
Q50 Eau Rouge to kick off series of performance Infinitis
Fri, 24 Jan 2014Infiniti is desperate to position itself as a brand for performance enthusiast. It's tried to create that impression by attaching its name to the Red Bull Racing team, by sprucing up the G37 Coupe and G37 Convertible as part of its lack-luster Infiniti Performance Line, and by bringing Sebastian Vettel on board to create a special edition FX crossover. But the Japanese luxury brand knows it's going to need something more comprehensive if it's going to go up against BMW and its M models, Mercedes and its AMGs, or Audi and its Quattro GmbH-tuned RS range.
That's why the Q50 Eau Rouge concept unveiled just last week at the Detroit Auto Show was so important to the marque. But Infiniti has more in store than just a concept. Nissan desires to put the Q50 Eau Rouge - named after the notoriously challenging turn at the Spa Francorchamps circuit in Belgium - into production with a 500-horsepower engine. But in speaking to Automotive News, Infiniti chief Johan de Nysschen hinted at more good news to come.
That could include a performance version of a new flagship sedan Infiniti is said to be working on, positioned above the current Q70 to fill the void left by the discontinued Q45 that capped the brand's range before it shifted its entire naming scheme behind it. The flagship sedan would need some serious muscle to challenge the likes of the Mercedes S63 AMG and Audi S8, but Infiniti seems bent on getting there. To cap it all off, Infiniti has long been rumored to be working on a halo sports car. Whether they'll all carry the Eau Rouge name, the IPL badge or some sort of other designator remains to be seen, but we'll enjoy seeing this development progress.
2014 Infiniti Q50 priced at $37,605*
Tue, 25 Jun 2013Infiniti has released full pricing information for its new 2014 Q50 line, which, as you're probably aware, replaces the well-liked G-series sedan. You may be wondering why this is news, as Infiniti announced pricing for its new Q50 sedan back in March. Apparently, though, those earlier prices applied only to the special pre-sell offer announced earlier this year and are only good for cars ordered by October 31, 2013.
Starting in November, base 2014 Q50 models with the automaker's 328-horsepower 3.7-liter V6 engine will begin at $37,605 (*including a $905 destination fee), while the sportier Q50S model will begin at $44,105. Adding all-wheel drive to either model costs an additional $1,800 over the standard rear-wheel-drive models. Regardless of engine or whether it's rear- or all-wheel drive, the Q50 comes with a seven-speed automatic transmission.
Opting for the 2014 Infiniti Q50 Hybrid will get the buyer a powertrain consisting of a 3.5-liter V6, a 50kW electric motor and a lithium ion battery that offers up a total power output of 354 hp and a highway fuel mileage rating of 36 miles per gallon, all for a starting price of $44,855, which includes the Premium group. The most expensive version of the new sedan is the Q50S Hybrid with all-wheel drive. That model carries an MSRP of $49,055.























