S Suv 4.0l Third Row New Tires New Battery Cruise Control Alloys Luggage Rack on 2040-cars

Auto blog

These are the 'Greenest' and 'Meanest' cars in 2015

As has become tradition, the American Council for an Energy-Efficient Economy (ACEEE) has come up with a ranking of what it refers to as the "greenest" cars of 2015, and, by way of contrast, a list of the so-called "meanest" cars, so those who value eco-friendliness over all else can choose which vehicles they should or should not consider buying. As you may expect, electric cars make up the majority of the greenest cars on the list, but, perhaps surprisingly to many, the Tesla Model S didn't make the cut. It's worth noting, too, that where the electricity an owner uses to charge their electric vehicle has a big impact on its overall environmental impact. "A car that is charged using electricity generated from natural gas or renewables is going to have significantly less impact on the environment than one charged on a coal-heavy grid," says ACEEE lead vehicle analyst Shruti Vaidyanathan. The ACEEE's list for 2015 looks very different than it did in 2014. It's an interesting collection, though – and we're sure this goes without saying, really – we'd recommend doing a bit more research into each vehicle and how it might fit into your daily life before making any purchase decisions. Click here to see the ACEEE's list of the Greenest and Meanest vehicles sold in the United States in 2015. Green Bugatti Chevrolet Fiat GM GMC Mercedes-Benz Nissan RAM smart Toyota greenest greenest cars

Nissan ZEOD RC finds nothing but trouble at 2014 Le Mans

Audi came away a big winner at this year's Le Mans competition, but Nissan has at least one thing to celebrate. The Pyrrhic victory apparently presages Nissan giving up on the gas-electric race car for Le Mans 2015. Before the race this weekend, the prototype ZEOD RC hybrid race car was doing quite well. In fact, given the way things turned out, Nissan's keen to mention that team engineers managed to get the car to complete a lap on electric power and hit a target speed of 300 kilometers per hour (186 miles per hour) on the Mulsanne Straight during testing. ZEOD RC stands for Zero Emission On Demand Racing Car. "The race was obviously very disappointing" – Wolfgang Reip Things didn't go so well once the real race started. The problem for the Deltawing-esque prototype – which is powered by a 1.5-liter gas ending putting out 400 horsepower and a pair of 110-kW electric motors – was that something broke in the transmission after just 23 minutes and five laps. Driver Wolfgang Reip put his best spin on the hybrid's collapse: "The race was obviously very disappointing but having got a taste of Le Mans now, I can't wait to get back." If Reip does return with Nissan, it will likely be in a more traditional Le Mons racer. The ZEOD RC was part of the LM P2 class, but Nissan says that, "For Le Mans 2015, Nissan will return to the LM P1 class." You can watch the full warm-up electric lap in a video below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Nissan ZEOD RC heroic electric lap followed by heartbreak Amazing morning warm-up result after all-nighter by crew "New tech" car halted by "old tech" issue Nissan breaks new ground in electric vehicles LE MANS, France – Nissan's assault on the Le Mans 24 Hours may have ended early, but the revolutionary Nissan ZEOD RC electric prototype still leaves Le Mans having reached its historic goals of hitting 300 km/h on the Mulsanne Straight and recording a complete lap of Le Mans on electric power only. The unique prototype – which features both internal combustion and electric power sources – reached its first target during Thursday night qualifying when Satoshi Motoyama exceeded 300 km/h before the first chicane on the Mulsanne Straight. Nissan's other key goal was to complete an entire 8.5-mile lap of Le Mans on pure electric power. GT Academy winner Wolfgang Reip was at the wheel when the team achieved this goal during the morning warm-up.

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.