2012 Nissan Altima S Sedan 4-door 2.5l Excellent Condition One Owner 28,616 Mile on 2040-cars

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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.

Nissan Patrol modified for backseat drivers

The McLaren F1 is most famous for holding the production-car top-speed record for over a decade, but it also made a name for itself by being one of the only production cars with a central driving position, a feature that's extremely rare. But in the world of custom cars, anything can happen. We're not sure if Dubai-based shop King of Customs was inspired by McLaren or is poking fun at backseat drivers (perhaps the builder or the commissioner just has quite the imagination), but its custom fifth-generation Nissan Patrol (the foundation of the Infiniti QX80 in the US) sports utility vehicle takes the term "central-driving position" to the next level. In the Patrol's case, "central" means that the driver's seat and controls are located in the second-row seating area.
It's a pretty clean conversion - if pointless - and we have to wonder how safe it is to drive such a vehicle. The front seats are now passenger seats, and the front airbags have been taken out and replaced with screens, according to King of Customs' Facebook page. So if the driver's view outside is impaired and the SUV is involved in a crash, you'd better hope nobody is up front. The screens on the backs of the front-seat headrests at least provide views from the side-view mirrors via cameras, the shop claims.
Watch the video below, marvel at the extreme impracticality of it all and see the thing drive.

2014 Nissan Rogue earns IIHS Top Safety Pick+ [w/videos]

The 2014 Nissan Rogue has scored a Top Safety Pick+ award following positive crash test results by the Insurance Institute for Highway Safety. The new crossover scored good results (the highest rating) in the group's five crashworthiness checks and a basic rating for front crash prevention.
The IIHS found that the Rogue also performed well in its small overlap front test with a low risk of injuries, and the driver's space maintained its structure well. It was an improvement over the previous generation, which received a marginal rating in that evaluation. The Rogue's optional forward collision warning system was enough for a basic rating in avoiding accidents.
To qualify as a Top Safety Pick, a vehicle must earn good ratings in the the moderate overlap front, side, roof strength and head restraint evaluations, plus a good or acceptable result in the small overlap front test. To receive the additional Plus rating in 2014, it must also have a basic, advanced or superior rating for front crash prevention. The IIHS scores vehicles as good, acceptable, marginal or poor, and avoidance systems are scored basic, advanced or superior, depending on the type of system and its performance. Scroll down to watch the videos of the small and moderate overlap crash tests and read the full IIHS statement.