2014 Nissan Altima 2.5 S 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.

2014 Rogue kicks off production as 10,000,000th Nissan built in Tennessee

News comes across our desks all the time of one manufacturer marking some milestone or another. But Nissan has just announced a double-whammy: Not only has Nissan's assembly plant in Smyrna, TN, just built its ten-millionth vehicle, but that ten-millionth vehicle just so happened to be the first Nissan Rogue to be built in the United States.
The milestone arrives after over three decades of production that has included such nameplates as the Sentra, Altima, Maxima, Leaf, Pathfinder, Infiniti QX60, Xterra, Frontier, and now the Rogue. The latter crossover has swelled into Nissan's second best-selling vehicle, with demand growing by nearly 50 percent from 2010 to 2012. Now redesigned for 2014 and built locally, Nissan is evidently banking on demand continuing to rise.

2021 L.A. Auto Show roundup | All the reveals, reviews, pictures

The L.A. Auto Show took place this week for the first time since the onset of the pandemic. It was a show packed with news and reveals, which hasn't really been the case with other shows we've seen this year, and Autoblog was on the floor covering every minute of it. Well, Riswick and Stocksdale were, anyway. The rest of us were sitting at home in our sweatpants, but hey, we'll take credit anyway. Let's get to it. Hyundai Seven Concept This is the Hyundai Seven Concept, and it’s meant to act as a preview for an incoming electric SUV for the Ioniq brand. It leans more toward the concept side of the spectrum than a production car, but expect the final SUV to take design cues from the Seven Concept. Kia Concept EV9 The Hyundai Seven counterpart isn't the only big, bold electric SUV at L.A. this year. Kia has its own take, and it's a modernized version of the traditional boxy utility vehicle called the Concept EV9. It also previews one of the next production electric cars for the brand, which should look right at home next to things like the Telluride. 2023 Kia Sportage HEV As promised, the 2023 Kia Sportage HEV has been revealed. The hybrid powertrain makes the compact SUV the most powerful version available, and it goes on sale next year. The engine is a turbocharged 1.6-liter four-cylinder paired with a 44-kW electric motor. Total output is 226 horsepower. The company didn't give a torque number, but it should basically be the same as the Sorento HEV that has the same basic powertrain: 258 pound-feet. Those numbers are a healthy step up from the 187 horsepower of the base 2.5-liter engine. 2022 Range Rover If you noticed how extra smooth and suave the new Range Rover looked during its recent reveal, Autoblog's James Riswick got a design tour that revealed some of the technological secrets to its success. "Less is more" is harder to achieve than it looks. Fisker Ocean Fisker has brought the new Ocean EV to the L.A. Auto Show, with a public preview at Manhattan Beach and a presence at the show itself. You can watch the public show reveal above, and see more shots from the show floor below. Fisker says the Ocean will start at $37,499 before incentives. That entry model would be the Sport trim with a single, 275-horsepower motor driving the front wheels and 250 miles of estimated range. It also has a 0-60 time of 6.9 seconds. 2023 Toyota bZ4X This is the 2023 Toyota bZ4X, due to hit U.S.