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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.

Compact SUV Comparison: Specs, pics and reviews of every brand's crossover

Honda CR-V vs Toyota RAV4. Chevy Equinox vs Ford Escape. Mazda CX-5 vs Subaru Forester. Whichever combinations of compact crossover SUV you're considering, there's probably a comparison test or chart out there to read. Heck, you can even create a three-car comparison yourself here at Autoblog. However, if you want a bunch of that information all in one convenient place, well, here it is. Our mega comparison of specs, features and photos of compact SUV entries from every mainstream manufacturer that sells them. That includes the 2018 Chevrolet Equinox, 2018 Ford Escape, 2018 GMC Terrain, 2018 Honda CR-V, 2018 Hyundai Tucson, 2019 Jeep Cherokee (it's already on sale with notable changes from 2018), 2018 Jeep Compass, 2018 Kia Sportage, 2018 Mazda CX-5, 2018 Mitsubishi Eclipse Cross (none of Mitsu's SUVs are perfect fits for this segment, so we deemed the MEC the most competitive fit), 2018 Nissan Rogue, 2018 Subaru Forester, 2018 Toyota RAV4 and 2018 Volkswagen Tiguan. We can update this comparison as more information about 2019 models is released, most notably the Forester and RAV4. Now, there are certainly some models that are smaller (Nissan Rogue Sport) or larger (Kia Sorento) that could also be considered, but we figured it was wise to stick with those in this sweet spot of comparable size and price. We also included links to Autoblog reviews, buying guides and smaller comparisons. Engines and Transmissions With rare exception, this segment features four-cylinder power. Sometimes it's turbocharged, often its not, but standard engine outputs are generally in the same ballpark. Therefore, we'd recommend focusing on torque output, as it's what will make a difference around town or when passing, and weighing that versus fuel economy (the Chevy Equinox, GMC Terrain, Honda CR-V and Mazda CX-5 make particularly strong cases in this regard). Many drivers aren't too fond of continuously variable transmissions (CVT), either, so that's another thing to consider and note during a test drive. As you can see, several models are available with performance upgrades. Besides the Jeep Cherokee's available V6, all are more powerful turbocharged four-cylinder engines. The exception to this would be the Honda CR-V and Ford Escape, as their 1.5-liter turbo engines don't prioritize performance. Instead, they serve as overall upgrades to the base naturally aspirated engines standard on only their base trim levels (CR-V LX and Escape S).

Suppliers love Toyota and Honda: Why that matters to you

You might think that a survey of automotive suppliers and their relationship with OEMs is the automotive equivalent of nerd prom. In some ways that's what the North American Automotive OEM-Supplier Working Relations Index (WRI) is. The study, the 17th annual conducted by Planning Perspectives Inc., is based on input from 652 salespeople from 108 Tier One suppliers, or, PPI points out, 40 of the top 50 automotive suppliers in North America. Suppliers to General Motors, Ford, FCA, Toyota, Honda, and Nissan. But the results have consequences in terms of tens of millions of dollars for OEMs - and in the quality, technology, and cost of the next vehicle you buy. There are a couple of ways to look at the results of the WRI. One is, "So what else is new?" And the other is, "Damn! How did that happen?" The study looks at five relationship areas — OEM Supplier Relationship; OEM Communication; OEM Help; OEM Hindrance; Supplier Profit Opportunity — within six purchasing areas — Body-in-White; Chassis; Electrical/Electronics; Exterior; Interior; Powertrain. In the overall rankings, Toyota is on top for the 15 th time in 17 years, with a score of 328. Honda, the only company to best Toyota (in 2009 and 2010), comes in second, at 319. Those two companies, explains John Henke, president of PPI, have collaborative working arrangements with colleagues and suppliers alike built into the very fabric of their cultures. This, however, is not a situation where one can readily conclude it is about "Japanese companies," because the third company with headquarters on the island of Honshu, Nissan, came in dead last. This is the "How did that happen?" portion. The Nissan score of 203 puts it 125 points behind Toyota. There hasn't been a number that low since the then-Chrysler Corp. scored 187 in 2010, when the company was clawing its way out of the recession. Clearly, the suppliers don't feel particularly engaged by the buyers at Nissan. Henke explains that whether a company does well or not on the WRI is rather simple. All people do things based on what they're measured on. "If you're measured on taking 10% out of your annual buy, you immediately know how to do it. But if you're also measured on improving relations, suddenly there is a new dynamic as to what you can do to achieve both.