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Infiniti's variable compression engine in the 2019 QX50 is the first of its kind

The world's first variable compression ratio engine is here, in a production car. That car is the 2019 Infiniti QX50, debuting this week at the Los Angeles Auto Show. The midsize crossover has seen a refresh that has brought it an all-new platform together with new driver assist features, but it's the engine that's the centerpiece here. Nearly everything is continuously variable under the hood of the QX50 – not only the new shift-by-wire XTRONIC CVT. The new VC-Turbo gasoline engine is able to change its compression ratio from 8:1 to 14:1, or anything in between depending of the driving situation; whether there is need for top-end power or turbodiesel-like torque from low revs, or optimized fuel economy. The pistons' reach is continuously adjusted by an electric "Harmonic Drive" motor, which controls a multi-link system, affecting the top-dead-center of the pistons and changing the compression. The engine can also switch between efficiency-maximizing Atkinson cycle and regular combustion cycle, on the go – and there's both multipoint injection and gasoline direct injection employed. The result is 268 horsepower at 5,600 rpm and 280 pound-feet of torque at 4,400 rpm; good figures for a 2.0-liter four-cylinder gasoline engine with a single-scroll turbocharger. Infiniti says that the FWD version's fuel economy of 27 miles per gallon combined is 35-percent better than the previous-generation V6 engine; in AWD guise, it reaches 26 mpg, which is a 30-percent improvement. The new engine is pretty much all-aluminum, but the vaguely magical-sounding "transformative multi-link components" behind the variable compression system are made from high-carbon steel alloy. The engine's multi-link system also enables it to do away with any balancing shafts, and Infiniti compares its smoothness to a V6 rather than a regular four-cylinder. In addition to the aforementioned tech, the VC-Turbo engine has the world's first active engine mount vibration damping system to smoothen its operation even further. Related Video:

2016 Infiniti QX60 Quick Spin

UPDATE: The original version of this story called Mazda's range-topping CX-9 the Platinum. This is incorrect. The top-of-the-line model will be called the CX-9 Signature. The story has been edited accordingly. When it comes to selling cars, getting customers into showrooms is half the battle. For Infiniti, one of its biggest draws is the QX60 – the three-row CUV originally known as the JX35, based on parent company Nissan's Pathfinder. QX60 buyers are young, female, and – most importantly – nine out of ten are new to the brand. The facelifted QX60, which was originally introduced in December, is here to maintain those stats. That's important, especially now, as increasingly premium mainstream offerings are proliferating throughout the market. This isn't a new trend – GMC's Acadia Denali predates the JX35, for example – but now the QX60 has to contend with things like the Ford Explorer Platinum, Honda Pilot Elite, Dodge Durango Citadel, and the upcoming Mazda CX-9 Signature. These vehicles are similarly priced, and offer similar capabilities and accoutrements to the QX60. Infiniti timed its QX60 update well, then, with a focus on aesthetics and maintaining the same driving dynamics. In the end, Infiniti offers a freshened CUV that should have no trouble keeping foot traffic flowing into the brand's showrooms. Driving Notes This might not be the popular opinion, but to our eyes, the QX60 is the best-looking product Infiniti currently makes (of course, the Q60 Coupe will trump that when it enters production). This thing has presence – we caught ourselves staring a number of times. But our lingering glances make sense when you look at the QX60 alongside the original JX35. The former lacked real hard edges or sharp details. Look at this comparison gallery to see the difference. What's remarkable is that Infiniti made this big visual improvement as part of a mid-cycle refresh. Yes, the front and rear fascias, headlights, and taillights were swapped out, but the cumulative effect is a dramatically more premium and refined aesthetic. We dig the way the dark grille integrates more neatly with the lower intake, and the LED running lights give the sharper, more aggressive headlamps a piercing effect. Out back, a revised rear bumper and a wider chrome strip produce a more substantial, upright appearance. These are little changes, to be clear, but taken as a whole they feel far more sweeping. The same can't be said of the cabin.

Nissan Pathfinder, Infiniti JX in transmission safety probe

Nissan may be forced to recall 110,000 Pathfinder and Infiniti JX35 crossovers, due to a number of customer complaints. Consumers report suddenly losing power, with repair facilities blaming the issue on faulty transmission cooler line connections. Both the Pathfinder and JX35 use a continuously variable transmission. As of right now, the only vehicles being investigated are from model year 2013.
Nissan has been cooperating with the National Highway Traffic Safety Administration, according to a report from Reuters, and it has developed a fix for the affected vehicles. It's not clear whether this will develop into a full-blown recall, as there have been no known cases of injuries or crashes. But with a potential 110,000 vehicles prone to sudden power loss, a recall seems to be a likely outcome.