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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:

New Infiniti QX crossover: expect a pretty Q60 on stilts

When the doors open at the Beijing Motor Show later this month, Infiniti will have a new concept to show off dubbed the QX Sport Inspiration. It takes the form of a mid-size sport-ute that could preview the next-generation QX70 crossover. The Japanese luxury automaker isn't giving us much to go on aside from the decidedly enigmatic teaser image above. But we're expecting the crossover concept to follow closely along the stylistic lines of the Q60 coupe concept we saw in Detroit earlier this year – albeit in a taller form with more space inside. And that's no bad thing, considering how sexy that two-door show car was. Infiniti tells us to anticipate such design elements as floating A-pillars and wide wheel arches, giving it a forward-looking and aggressive appearance that will foreshadow the company's next generation of crossovers. Watch this space for more as the Chinese auto expo prepares to open its doors on April 25. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. INFINITI QX SPORT INSPIRATION BREAKS COVER AHEAD OF 2016 BEIJING AUTO SHOW - First glimpse of exciting new SUV concept from Infiniti - Inspired by 'Powerful Elegance' form language - World premiere at 2016 Beijing Auto Show Rolle, Switzerland – Infiniti has revealed a first glimpse of its daring new QX Sport Inspiration, an exploration of the brand's vision for a next-generation, mid-size premium SUV. Inspired by Infiniti's 'Powerful Elegance' design philosophy, the QX Sport Inspiration features the brand's design hallmarks and stands out thanks to its striking design details and sophisticated craftsmanship. The concept rendering illustrates SUV-like proportions highlighted with wide muscular lines reminiscent of the Q60 Concept, floating A-pillars and extra-wide wheel arches. Alfonso Albaisa, Infiniti Executive Design Director, commented: "The QX Sport Inspiration expresses a power and purpose that is uniquely Infiniti. With a flowing, natural aesthetic, this concept demonstrates how Infiniti can offer something new and exciting with future QX SUV models." The Infiniti QX Sport Inspiration makes its global debut at the 2016 Beijing Auto Show (press days on April 25/26, public days from April 29 – May 4).

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.