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New details emerge on Inifiniti QX50’s unique new variable-compression engine

Infiniti will release the world's first production variable-compression engine when it releases the 2019 QX50 midsize SUV sometime next year. Now we have some new details on the innovative new engine, which Infiniti is calling VC-T, for Variable Compression Turbo, after the luxury brand offered a prototype test drive. We wrote extensively about the complicated technology underpinning the new engine last year. It's the latest novel development that could represent a range-extender, if you will, for the embattled internal combustion engine in an era when automakers and governments are shifting their focus to electric vehicles. The VC-T is a new inline-four, 2.0-liter that combines the power of a high-performance turbo gasoline engine with the torque and efficiency of an advanced diesel engine, but without the latter's notorious emissions. It features the ability to seamlessly raise or lower the stroke of the pistons in the combustion chamber, depending on the driving conditions it detects and inputs from the driver, to select the best compression ratio—anywhere between 8:1, typical for high-performance engines, and 14:1 for high efficiency. In essence, it delivers the performance of a V6 but is much more efficient, with improved fuel efficiency of between 10 to 15 percent with its best competitors, per Car and Driver. You can view how it works in motion via the video below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. It's also quieter, more lightweight and compact than V6 engines with comparable power outputs, estimated at 268 horsepower and 288 pound-feet of torque. In a prototype test drive, Car and Driver writes that the engine "felt very conventional" and responsive, with strong and smooth acceleration. "The only indication you have that the compression ratio is changing is from an indicator in the instrument cluster next to the boost gauge." The engine is expected to deliver fuel economy gains of 27 percent in combined city-highway EPA rating over the outgoing QX50, which had a 3.7-liter V6. The 2019 model, fitted with the VC-T, should get about 26 mpg in combined fuel economy, and it will get to 60 mph almost one second faster than its four-cylinder counterparts, Nissan's chief powertrain engineer, Shinichi Kiga, told Automotive News. The VC-T engine is the result of 20 years of development spanning more than 100 prototypes and around 300 patents at Nissan.

Infiniti Q80 Inspiration Concept previews a fullsize future of luxury

Well, this certainly looks like a concept, doesn't it? From the wide, portal-esque door opeings to the boattail rear window design, there's just so much about the Infiniti Q80 Inspiration that looks like it would never actually reach production that we're impressed the automaker had the gumption to put the machine together and show it off at the 2014 Paris Motor Show.
This marks the first time that Infiniti has shown any sort of real intent to enter into the rarefied air of the fullsize luxury sedan segment, populated as it is by the likes of the Audi A8, BMW 7 Series and Mercedes-Benz S-Class. Those are extremely heavy hitters to market against, and Infiniti sounds anxious to throw its hat in the ring.
"We aim to do this with elegance, style, and emotion," says Francois Bancon, Infiniti Vice President, Product Strategy. "This car is making a statement. Q80 Inspiration is a precursor of a production model in this segment and, as such, integral to our future."

Infiniti shows off the new Q50 engine lineup in Chicago

Infiniti has a raft of engine options it's rolling out on the Q50 sedan. We found out about most of them a couple of months ago, but they're now confirmed in all their turbocharged glory. And they'll all be showcased this week at the Chicago Auto Show. The base engine is a 2.0-liter turbo four based on a Mercedes design and built at the new joint-venture engine plant in Tennessee. The engine produces 208 horsepower and 258 pound-feet of torque and will be available in the Q50 2.0t in either rear- or all-wheel drive. If those specs strike you as familiar, they're the same that you'd find in the Mercedes CLA250 and GLA250, both of which similarly make their 4Matic traction optional, but come standard in front- (not rear-) drive form. Above the four-pot sits a new 3.0-liter twin-turbo V6 that replaces the naturally aspirated 3.7-liter unit and will be available in two states of tune. The 3.0t model offers 300 hp and 295 lb-ft, but the performance model – dubbed Q50 Red Sport 400 – cranks it up to 400 hp and 350 lb-ft. Both versions come mated to a seven-speed automatic transmission and either rear- or all-wheel drive. The fourth powertrain options carries over in the form of the Q50 Hybrid, which still pairs a naturally aspirated 3.5-liter V6 to a 50-kW electric motor for a combined output of 360 hp. So if you like your sports sedan to come with some manner of assist, the Q50 offers plenty of choices. But if you're in the atmospheric camp, we're afraid you'll have to look elsewhere. Related Video: Infiniti Presents Three New Q50 Sports Sedan Engines for the First Time at the 2016 Chicago Auto Show - Q50 Red Sport 400 offers new 400-horsepower VR-series 3.0-liter V6 twin turbo engine - Advanced 300-horsepower VR V6 twin-turbo version shown for the first time in Chicago - Pair of new V6 twin turbo engines joined by new 2.0-liter turbo inline-4 rated at 208 horsepower CHICAGO (Feb. 11, 2016) – Infiniti today revealed the full lineup of new advanced engines for its Infiniti Q50 sports sedan at the 2016 Chicago Auto, including two 3.0-liter V6 twin turbo engines and a 2.0-liter 4-cylinder turbo engine. The trifecta of new powerplants will be available beginning this spring. Joining the three new engine-equipped Q50 models – designated the Q50 2.0t, Q50 3.0t and Q50 Red Sport 400 – on display at the country's oldest and best-attended auto show are the redesigned 2016 QX60 crossover and the all-new QX30 premium active crossover.