2006 Infiniti G35 Base Sedan 4-door 3.5l on 2040-cars

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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:

2021 Infiniti QX55 will get the company in the crossover 'coupe' game

Seeing how German automakers are printing money with less-practical but arguably more stylish crossover "coupes," Japanese luxury brand is getting in on the action, too. The company announced it will introduce a fastback crossover named QX55. And while the company hasn't revealed the actual vehicle yet, it did release the above conceptual sketch. As you can see, it doesn't reveal much except that the QX55 will have a low, curvy shape. It will probably have four doors like its competitors. Infiniti says the roofline is meant to evoke the company's first crossover, the FX. We disagree on that detail, because while the FX did have a stylish, low-slung roof compared with its contemporaries, it still had a fairly conventional and upright hatch (see below). Judging by the name, the QX55 will probably be based on the platform and powertrain of the QX50. That means it should have a version of that crossover's variable-compression ratio turbocharged four-cylinder, along with front-wheel drive or all-wheel drive. Infiniti says the QX55 will go on sale in the summer of 2020, so expect a full reveal during the coming auto show season.

Infiniti takes to Facebook to explain model names, mentions 550-hp flagship

Infiniti caused quite a stir this week when it announced that it would be changing its vehicle names so that all of its cars start with Q and all of its crossovers and SUVs start with QX. Many displeased fans and owners took to social media to voice their opinions, and Johan de Nysschen, the new Infiniti boss, responded today with a Facebook post of his own.
In the note, de Nysschen talks about the challenge of product expansions with alphanumeric names that allow for flexibility without encroaching on the trademarked names of other automakers, although we're sure de Nysschen's former colleagues at Audi aren't looking forward to a Q30 or Q50. He also says that as Infiniti grows to become a global brand, the new naming structure - which closely mimics Volvo - is also designed to reduce confusion (just don't tell that to current owners). One thing that de Nysschen assured wouldn't happen is a confusing "X" added to the end of all-wheel-drive model names that would result in names like the Q60X or, even worse, the QX50X.
While we are not looking forward to relearning Infiniti's product lineup, de Nysschen has given us something to look forward to courtesy of a new performance sedan. From the brief explanation of this car, which was used as a key example in explaining the validity of the new names, we learned that the new model will be a performance version of what is now the M sedan, and it will be powered by a "charged induction" 3.0-liter V6 producing more than 550 horsepower. The M's name will become the Q70, but as of right now, it isn't clear if this will be an IPL model or something else.