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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:

Analyzing De Nyscchen's 25-year comeback plan for Infiniti

"It took us 25 years to bring Audi back in the US. This kind of thing takes a long time."
When Johan De Nysschen left his post at Audi of America last year to take the seemingly thankless job of leading Infiniti's global operations, it seemed like a familiar scenario. Like Michael Dukakis going from one of two men that could have won the White House to teaching political science at an obscure Florida college.

Infiniti Q30 prototype has entry-level luxury in the bag

The Infiniti Q30 Concept signaled the Japanese brand's clear intentions to join the growing global compact premium segment. Now, as evidenced by these images, we can see development of the brand's first compact hatchback is proceeding apace.
Our spies point to the similarity between this camouflaged tester and the Mercedes-Benz GLA-Class as further evidence to the cars' shared platform, although we'll admit, we don't necessarily see the similarities. The Q30's overall look, to our eyes, is like a scaled-down, lower-riding QX50, the model previously known as EX. Infiniti design elements, like its squat greenhouse, long hood and double-arch grille are all visible.
The Mercedes-Benz connection should be clearer under the hood, though, as the Q30 is expected to be powered by the same 2.0-liter, turbocharged Mercedes four-pot that's been leading the charge throughout the brand's entry-level models, namely the CLA-, GLA- and C-Class.