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2018 wrap-up, Ford Ranger and Mercedes A-Class | Autoblog Podcast #566

In the final Autoblog Podcast of 2018, Editor-in-Chief Greg Migliore is joined by Senior Editor Alex Kierstein and Associate Editor Reese Counts. They kick off the conversation by talking about a couple of hot new vehicles: the Ford Ranger and Mercedes-Benz A 220 4Matic. Then they round up the biggest stories of 2018 before helping a listener choose a new car in the "Spend My Money" segment. Thanks for listening, and happy holidays. The Autoblog Podcast will be back next year. Autoblog Podcast #566 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Driving the 2019 Ford Ranger Driving the 2019 Mercedes-Benz A-Class 2018 news roundup The ups and downs of Tesla and Elon Musk Losing Sergio Marchionne and the arrest of Carlos Ghosn Lots of layoffs Trump and tariffs Spend My Money Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video:

France's Macron says Renault-Nissan partnership is a 'jewel' to be strengthened

TOKYO — French President Emmanuel Macron on Wednesday called for further synergies and alliances to strengthen the Renault-Nissan partnership in a global market. "The Renault-Nissan alliance is a jewel in the industry," Macron told French expatriates in Tokyo. "We created a giant which we must not only preserve but develop synergies and alliances to strengthen it in the face of international competition." His comments appeared to leave open the possibility both of a deeper integration of the 20-year-old Renault-Nissan alliance, which has been shaken by the scandal over its former chief Carlos Ghosn, and tie-ups with other manufacturers. Last month, Renault and Italian-American group Fiat Chrysler Automobiles (FCA) announced they were in merger talks. But the discussions were called off after FCA grew frustrated with the role the French state was playing, especially its need to secure agreement from Nissan over how to move the merger forward. Since the break-off of the FCA talks, Renault executives have been looking to rebuild ties with Nissan, which is keen to reduce the influence the French state has in the alliance via its 15% stake in Renault. Renault owns 43% of the Japanese automaker, which in turn holds a 15%, non-voting stake in its partner. Nissan on Tuesday threw cold water on hopes for a quick fix to strained relations with France's Renault SA , saying inequality between the partners could unravel their two-decade-old automaking alliance. Macron said on Wednesday France would remain vigilant that Carlos Ghosn's presumption of innocence and the former Renault-Nissan leader's rights to defend himself in a Japanese lawcase are respected. "It's not up to the French president to interfere publicly in a judicial case," Macron said. "Japanese justice is independent." "We will be vigilant, just like with all our citizens across the world who have to answer to the law, through consular activity, so that the defendant's rights and presumption of innocence are respected in that case."

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.