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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:

Zombie cars: 9 discontinued vehicles that aren't dead yet

Car models come and go, but as revealed by monthly sales data, once a car is discontinued, it doesn't just disappear instantly. And in the case of some models, vanishing into obscurity can be a slow, tedious process. That's the case with the 12 cars we have here. All of them have been discontinued, but car companies keep racking up "new" sales with them. There are actually more discontinued cars that are still registering new sales than what we decided to include here. We kept this list to the oldest or otherwise most interesting vehicles still being sold as new, including a supercar. We'll run the list in alphabetical order, starting with *drumroll* ... BMW 6 Series: 55 total sales BMW quietly removed the 6 Series from the U.S. market during the 2019 model year. It had been available in three configurations, a hardtop coupe, a convertible and a sleek four-door coupe-like shape.   BMW i8: 18 total sales We've always had a soft spot for the BMW i8, despite the fact that it never quite fit into a particular category. It was sporty, but nowhere near as fast as similarly-priced competitors. It looked very high-tech and boasted a unique carbon fiber chassis design and a plug-in hybrid powertrain, but wasn't really designed for maximum efficiency or maximum performance. Still, the in-betweener was very cool to look at and drive, and 18 buyers took one home over the course of 2021.   Chevy Impala: 750 total sales The Impala represented classic American tastes at a time when American tastes were shifting away from soft-riding sedans with big interior room and trunk space and into higher-riding crossovers. A total of 750 sales were inked last year.   Chrysler 200: 15 total sales The Chrysler 200 was actually a pretty nice sedan, with good looks and decent driving dynamics let down by a lack of roominess, particularly in the back seat. Of course, as we said regarding the Chevy Impala, the number of Americans in the market for sedans is rapidly winding down, and other automakers are following Chrysler's footsteps in canceling their slow-selling four-doors. Even if Chrysler never really found its footing in the ultra-competitive midsize sedan segment, apparently dealerships have a few leftover 2017 200s floating around. And for some reason, 15 buyers decided to sign the dotted line to take one of these aging sedans home last year.

Nissan sets 2017 sales record with help from Rogue, Titan, and Armada

Nissan Group said its U.S. sales climbed 1.9 percent in 2017 to an all-time record of more than 1.59 million vehicles sold. Free pizza in the conference rooms in Nashville, right? But a closer look shows the company mirroring overall industry trends, with plenty of declining-popularity cars but also a few aging trucks and SUVs. Taken together, Nissan's trucks, SUVs and crossovers saved the day, selling an all-time high of 765,624 total units, up 15 percent from 2016. That offset a 10.9-percent drop in sales of Nissan's cars, as volume sellers like the Altima and Versa posted steep drops. Also buoying overall results was the Infiniti division, which gained 10 percent from the previous year on the strength of models like the Q60 and QX30. Nissan's record year owes a lot to the Rogue, its compact crossover, which set an annual sales record with 403,465 vehicles, an increase of 22.3 percent. Sales of the Titan, Nissan's full-size pickup, grew an impressive 141.9 percent to 52,924 units, while the Armada, a full-size three-row SUV that was all-new for 2017, also saw a huge jump in sales (154.1 percent) to 35,667. Infiniti, meanwhile, saw overall sales climb 10.9 percent on the strength of huge gains by the Q60 Coupe, which rose 170.8 percent, and the QX30 crossover, which grew almost 524 percent. That being said, Infiniti volume is relatively low. The Q60 Coupe sold a total of 40,444 units and the QX30 14,093 for 2017, while Nissan shifted 40,172 Rogues in December alone. On the car side, the Maxima did well, gaining 7.9 percent to finish at 67,627. Volume-wise, the Sentra dominated, nudging up 1.7 percent to 218,451. But the rest of the lineup mirrored industry trends for the car segment, with steep drops for the Altima (down 17 percent), battery-electric Leaf (-19.8 percent), Versa (-19.2 percent) and Juke (-48.1 percent). Several truck, crossover and SUV models are also not faring so well. The aging Frontier pickup, last updated in 2005, fell 14.5 percent, the Pathfinder slipped by 0.8 percent, the Quest minivan plummeted 55.5 percent and the upscale Murano crossover fell by 11.8 percent. A Nissan spokesman says the Quest is no longer being built for the U.S. market starting with the 2018 model year. Meanwhile, reinforcements are coming. Nissan has said it's planning a new generation of the Frontier, its entry-level pickup, but hasn't clarified when.