2009 Nissan Murano S Sport Utility 4-door 3.5l on 2040-cars

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Nissan Sentra gets mean with 240-hp Nismo concept

Nissan's Sentra Nismo Concept made its world debut at the LA Auto Show today as part of the Japanese automaker's intitiative to expand its performance line of factory performance models, and it's packing a turbocharged inline four-cylinder engine with 240 horsepower and 240 pound-feet of torque - that's 110 hp more than the regular Sentra.
Of course, no high-performance version of any car would be complete without the suspension upgrades to handle the power, and Nissan has fitted Nismo-tuned suspension and a limited-slip differential to the little front-wheel-drive sedan. With such an increase in power, Nissan wisely chose to swap out the stock brakes for the Brembo calipers and discs from the 370Z. Larger 225-millimeter-wide tires are wrapped around 19-inch Rays wheels and contained within wider fender flares. The steering and six-speed manual transmission also were tuned by Nismo.
The exterior gets new aerodynamic bits, such as a revised front fascia, a chin spoiler and a new rear spoiler, while the interior gets a nice set of Recaro seats and a leather-and-Alcantara steering wheel. For more information on the Sentra Nismo Concept, check out the press release below, and feel free to head over to the auto show photo gallery to see the car up close.

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.

2014 Nissan Rogue

The compact crossover segment is crowded because it offers near-perfect transportation for small families and empty nesters alike. As more and more consumers discover the benefits of compact crossovers - riding tall in traffic, enjoying four-cylinder fuel economy and the confidence of all-weather traction - automakers are jumping into the game to meet the increasing demand. Today's choices, in no particular order, include the Honda CR-V, Jeep Cherokee, Mazda CX-5, Hyundai Tucson, Mini Countryman, Subaru Forester, Kia Sportage, Volkswagen Tiguan, Ford Escape, Mitsubishi Outlander, Toyota RAV4 and this Nissan Rogue. Nearly all start around $22,000 in base trim and work their way reasonably upwards with more appealing trim levels and options. If you spend much over $33,000 in this segment, you are a glutton for frosting.
The latest player from Nissan is its all-new second-generation Rogue, introduced late last year as a 2014 model. After a brief First Drive in October, we recently welcomed back the Rogue for a week-long review. The plan was to embed the compact crossover into a family routine during the holidays, where it would receive a hearty workout hauling everything from five adult passengers and their shopping bags to trays loaded with warm honey-glazed hams and pecan pies for a dinner party. The compact CUV handled all with poise, but everything wasn't as sweet as its edible cargo.