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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:

Listen to the 2020 Infiniti Q60 Red Sport 400's screaming exhaust

The best thing about the 2020 Infiniti Q60 Red Sport 400 is its engine. That 3.0-liter twin-turbo V6 makes one of the better noises in the automotive landscape on its way to the 6,800 rpm redline. It makes 400 horsepower and 350 pound-feet of torque, and the engine feels every bit that strong. Peak power is made at a high 6,400 rpm, so it feels linear all the way up to that point. There’s no mistaking this for a naturally aspirated engine with the lag off the line, but once itÂ’s up and running, thereÂ’s no obvious fading of power in the higher rpms. As for the sound Â… itÂ’s also pretty spectacular. We took the Q60 out to some of our favorite deserted backroads and let it rip with a GoPro attached to the bumper. This particular Q60 Red Sport 400 is fitted with a more aggressive exhaust from Infiniti. ItÂ’s an axle-back exhaust, aptly named the “Axle-Back Sport Exhaust Kit.” Infiniti sells the exhaust on its official online parts store — thereÂ’s one available for the Q60 and another for the Q50. ItÂ’s currently listed for $707 and is backed by the original factory warranty. Buy it from the store, and then have the dealer fit it to your new (or old) car. WeÂ’ve driven Infinitis with this engine that donÂ’t have the sport exhaust installed, and theyÂ’re nowhere near as loud. And after driving one with the exhaust, itÂ’s safe to say the factory exhaust is a bit too quiet for our tastes. Starting the cold engine up in the morning is much more satisfying. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. And under load this exhaust sounds fantastic, too. In the cabin we hear loud intake whooshes, and on the outside we get to hear its screaming yowl. ThereÂ’s enough sound deadening in the cabin to make it refined and luxurious on light throttle applications, but the exhaustÂ’s sound doesnÂ’t ever disappear. A bit of drone sneaks in on the highway, but if you turn up the decent-sounding Bose audio system, it fades away. More cars could use legitimately aggressive exhausts like this one. Manufacturers continue to pump fake audio into the cabin over the speakers, but itÂ’s not as authentic as something like this. All thatÂ’s missing are bangs and pops on shifts, but we can live without them. Each downshift is delightful, and the overrun is music to our ears. Related video:

Infiniti Q30 goes full monty before Frankfurt

Infiniti is finally tearing off the camouflage and showing the world what the Q30 luxury hatchback actually looks like. Set to make a full debut Frankfurt Motor Show on September 15, the five-door marks the entry of the Japanese premium brand into the compact hatch ranks. The company's designers did a fantastic job of bringing the major elements from 2013's concept to the street, though. Like the earlier design, the production Q30 wears Infiniti's rounded rectangle grille and a chrome strip along the edge of the hood. The headlights are also left squinting from the concept. The only major change to the front end is an adjustment to the lower air dam to make it a little more realistic for production. Sadly, Infiniti is only providing this single front three-quarters perspective on the upcoming five-door for now, but check out the C-pillar in the background to spot the similarly pointed design there, as well. The changes are actually more noticeable when comparing the Q30 with its platform-mate, the QX30 compact crossover concept. The hatchback noticeably softens many of the CUVs swoopy lines to be a bit more mainstream. This is especially true along the front where the big air intakes from the QX are made significantly smaller. Production of the Q30 is slated to start in Sunderland, England, by the end of the year. They should actually arrive in showrooms there before the calendar runs out. Still, we're looking forward to Frankfurt for a more complete view of Infiniti's little luxury hatchback. Related Video: INFINITI Q30 PREMIUM ACTIVE COMPACT SET FOR FRANKFURT IAA 2015 PREMIERE Daring, expressive design meets advanced ride and handling performance Category-breaking Q30 faithful to 2013 concept car World premiere for global media September 15th at Frankfurt Motor Show Hong Kong – The first ever Infiniti Q30 Premium Active Compact is ready for its world premiere at the International Frankfurt Motor Show in September this year. Featuring Infiniti's iconic design language, the all-new Q30 represents a category-breaking vehicle concept developed for customers seeking urban individuality. Its dynamic drive characteristics provide for Infiniti-typical confident and responsive performance as well as excellent ride and handling. Crafted trims and expressive interiors extend the striking design approach from the exterior into the passenger cabin.