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Infiniti Wasn’t Fibbing When It Estimated the Revolutionary QX50 Engine’s Thirst

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One factor is obvious — with variable compression comes a newfound lack of thirst.

Infiniti’s earlier midsize QX50 crossover didn’t astound in its thrift, garnering 20 miles per gallon on the EPA mixed cycle. The transfer to a brand new, entrance-drive platform and addition of a years-in-the-making gasoline engine for 2019 has carried out wonders for the mannequin’s consuming behavior, nevertheless, and Infiniti engineers pegged the MPG figures proper on the nostril.

With the 2019 QX50‘s fuel financial system now confirmed by the EPA, it begs the query: simply how a lot of the mannequin’s thriftiness can the variable compression engine take credit score for?

By adopting a turbocharged 4-cylinder with revolutionary internals, the entrance-drive 2019 QX50 delivers 27 mpg mixed, 24 in the metropolis, and 31 on the freeway. Shave off 1 mpg from the freeway and mixed figures for the all-wheel-drive mannequin.

That is precisely the estimated 35 % (FWD) and 30 % (AWD) improve in fuel financial system touted by Infiniti reps at a current first drive occasion. Final yr, chief powertrain engineer Shinichi Kiga stated the VC-T engine would assist the new QX50 prime the previous one by 27 % on the mixed cycle.

To place the mileage into perspective, Acura’s MDX Sport Hybrid, obtainable solely in AWD, charges 27 mph on the mixed cycle. However the Infiniti, devoid of any expensive electrical trappings, beats it by three mpg on the freeway.

Image: 2019 Infiniti QX50 VC Turbo Engine

It can be fascinating — and informative — to see an engine swap carried out on an present mannequin, with no different modifications. That’s as a result of, for 2019, the QX50 donned greater than only a new pores and skin and beating coronary heart. Its engine went from a three.7-liter naturally aspirated V6 to a turbocharged 4-banger designed to make up for the misplaced displacement with various piston attain. Horsepower shrunk from 325 to 268, with torque seeing a lift from 267 to 280 lb-ft.

Whereas engineers shaved some weight from the new mannequin, the misplaced heft didn’t quantity to greater than one hundred kilos. The earlier seven-velocity automated transmission additionally disappeared in favor of a regularly variable unit programmed with financial system in thoughts. It’s no secret CVTs are the go-to ‘field for extremely-thrifty fashions, however mixed MPG good points properly into the double digits will not be one thing you’ll attain with a easy tranny swap.

In the absence of serious lightweighting, the new engine appears to be the most important wrongdoer. It’s definitely a win for Infiniti engineers and the model itself, nevertheless it stays to be seen if the new engine (and styling) helps win the QX50 extra followers than the earlier-era mannequin, which by no means turned an enormous participant in the all-essential premium crossover phase.

As for reliability, we will solely belief Infiniti did its homework there, too.

[Images: Infiniti]

– Infiniti Wasn’t Fibbing When It Estimated the Revolutionary QX50 Engine’s Thirst –

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