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2018 Ford Expedition vs other big SUVs: How it compares on paper

With our Alex Kierstein rightly impressed in his first-drive review of the new 2018 Ford Expedition, we decided to dig a little deeper into the numbers, and we came up with the spreadsheet below to highlight how the new 2018 Expedition compares on paper to its main full-size SUV competitors: the 2018 Chevy Tahoe and Suburban (and therefore the 2018 GMC Yukon), 2018 Toyota Sequoia and 2018 Nissan Armada. We also threw in the new, even bigger 2018 Chevrolet Traverse since, as you'll see, its massive dimensions should put it on the radar for anyone who needs loads of passenger and cargo space but doesn't care as much about towing. A few notes about the chart above. First, the 6.2-liter V8 that's included with the new-for-2018 Tahoe RST trim level is the standard engine on the GMC Yukon Denali. You can apply most of the Tahoe's numbers to the entire Yukon and Yukon XL lineup. Second, though we highlighted categories where the Traverse led, we also highlighted the runner-up full-size SUV, since this was ultimately about that segment. Traverse numbers are broadly applicable to the new Buick Enclave. Related Video: Chevrolet Ford GMC Nissan Toyota SUV Comparison consumer ford expedition gmc yukon chevy traverse toyota sequoia nissan armada chevrolet tahoe ford expedition max

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.

Chinese Nissan Leaf goes on sale in September as Venucia e30

The upcoming Chinese version of the Nissan Leaf, the Venucia e30, was not the highlight of the Dongfeng Nissan stand at this year's Beijing Motor Show. That honor goes to the R30, a compact car with "segment-competitive fuel economy" and a starting price of under RMB 50,000 ($8,033 US). But that doesn't mean Dongfeng didn't make some news about the debut of the world's most popular electric vehicle in the world's most populous country. Dongfeng Nissan will start selling the e30 in the Chinese retail market this September. In a world where EV promises are not always worth the paper they're printed on, it's nice to see this target date is actually ahead of schedule. The sales launch follows EV pilot programs that saw 300 of the EVs rack up a total of one million kilometers (621,000 miles) in Guangzhou, Xiangyang and Dalian since December 2013. The e30 might just be the first or many EVs, since Donfeng-Nissan showed off the Viwa Concept EV last year. There are a few more details in the press release below. Dongfeng Nissan Unveils VENUCIA R30 at Auto China 2014 BEIJING, April 20, 2014 /PRNewswire/ -- Dongfeng Nissan Passenger Vehicle Company ("Dongfeng Nissan"), the passenger vehicle business unit of Nissan's joint venture in China, today unveiled R30 at Auto China 2014. R30 is the 4th production model for the company's new VENUCIA brand. The compact R30 delivers segment-competitive fuel economy with the strongest engine in class through a 1.2-liter gasoline engine, features a spacious interior, and offers easy handling for drivers to provide a high quality yet competitively priced car to Chinese consumers. The price of the main grade will be less than RMB 50,000. "Very competitively priced, R30 is the perfect entry car for Chinese consumers," said Ren Yong, Deputy Managing Director of Dongfeng Nissan. "I believe many Chinese consumers will choose R30 as their first car in the continuing motorization of China." Bookings for R30 will start within the next two months. Dongfeng Nissan also announced that e30, Venucia's electric vehicle, will be sold in the retail market starting in September. The company has already commenced EV pilot programs in the cities of Guangzhou, Xiangyang and Dalian, with a total of 300 e30s recording a total mileage of one million km since the programs started in December 2013. Venucia recorded sales of more than 100,000 units in 2013 and is targeting a 50 percent increase in sales this year.