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Nissan's Le Mans prototype V6 to power next GT-R

You can debate all you want about whether racing has any relevance to road cars. And while you're doing that, Nissan will be getting the most out of its GT-R LM Nismo. In fact, the latest reports indicate that the Japanese automaker will use the engine (or some version thereof) in the next-generation GT-R. The Nissan GT-R LM Nismo, for those who may have missed it, is the company's radical attempt to take on the Audis, Porsches and Toyotas of the top-tier LMP1 class in the FIA World Endurance Championship. And to do so at its flagship event, the 24 Hours of Le Mans. Only unlike its rivals, it's not a mid-engined, all-wheel-drive design; both the engine and the driven wheels are at the front end. That engine, however, isn't actually all that radical. It's a 3.0-liter twin-turbo V6 producing 550 horsepower. Potent, but nothing earth-shattering. In fact it's not far off from the 545-hp 3.8-liter unit in the current production GT-R. And according to Top Gear, in speaking with the racing program's director Ben Bowlby, it will be essentially the same engine that will power the next road-going GT-R. Now if you're thinking that something's missing here, you're right: the GT-R LM Nismo packs a lot more than 550 horses. It actually has over 1,250 on tap. The remaining 700 hp are kicked in by the electric component of the racing prototype's hybrid powertrain. The next GT-R is widely expected to incorporate hybrid technology as well, but it won't be good for 700 hp all on its own. And it will almost certainly be driving all four wheels like the current version. Related Video:

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.

Renault-Nissan-Mitsubishi adopts Android infotainment in coup for Google

PARIS — The Renault-Nissan-Mitsubishi carmaking alliance said on Tuesday it will adopt Alphabet's Google Android operating system, handing a victory to the U.S. tech giant as it pushes for a bigger share of the infotainment market. Renault, Nissan and Mitsubishi, with combined sales of 10.6 million vehicles last year, said future models will "integrate Google applications and services" including Maps and the voice-commanded Google Assistant. The move, first reported by the Wall Street Journal, leans more heavily on Big Tech than large or luxury rival carmakers have hitherto been willing to do. Many fear losing control of customer relationships, data and potentially significant future revenue from connected services. Some smaller manufacturers such as Volvo Cars have decided to embed Android Auto in their vehicles. But the scale of the shift by Renault-Nissan-Mitsubishi may cause a broader rethink of costly standalone tech strategies. "Major carmakers earlier were reluctant to do business with Google, but this has now changed," said Jauke de Jong, a research analyst at AFS Group in Amsterdam. "More carmakers could follow suit and partner with Google." Until now, carmakers have largely chosen Linux, Microsoft or QNX software to power infotainment. That yields clunkier platforms they can control, but which offer little scope to add new apps or functionality. Far more than just hooking up a phone The news may spell trouble for certain existing auto-tech suppliers such as mapping specialist TomTom, which counts Renault among its customers. Shares in the Dutch group fell by more than quarter after the announcement. In return for handing Google the infotainment keys, the alliance will bring the full clout of Android's thousands of apps to its brands' lineups — which include a strong contingent of affordably priced, no-frills models for emerging markets. The partnership promises "rich user experiences that are currently available only outside the vehicle or, to a limited extent, by connecting an Android device to supported vehicles," alliance development chief Hadi Zablit said. While many volume carmakers offer infotainment "mirroring" to pair with Apple iPhones or Android smartphones, premium rivals such as BMW and Daimler's Mercedes-Benz are investing heavily in their own operating systems, vocal assistants and connected services.