2001 Infiniti I30 T Sedan 4-door 3.0l 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:

2023 Infiniti Q50 gets small price bump and Premium Care

The Infiniti Q50 sedan continues for 2023 without the support of its coupe sibling, the Q60. There are just three small changes on the way, one being the addition of Infiniti Premium Care. Expanded to every Infiniti sold or leased in the U.S., Premium Care is a regular maintenance program for items like oil and filter changes, tire rotations, and inspections for up to three years. The second change is a higher price, the Q50 starting at $43,725 including the $1,075 destination fee, a $610 increase over 2022. MSRPs for the three trims next year and differences from 2022 are: Q50 Luxe: $43,725 ($610) Q50 Sensory: $49,425 ($400) Q50 Red Sport 400: $57,575 ($600) The last change is the availability of a Saddle Brown interior, which used to require stepping up to the Sensory. Rear-wheel drive is the standard layout, all-wheel drive can be optioned to any trim for $2,000. The twin-turbo 3.0-liter V6 hold steady at 300 horsepower and 295 pound-feet of torque for the Luxe and Sensory, or 400 hp and 350 lb-ft for the Red Sport 400, shifting through a seven-speed automatic no matter the output. It's possible there are more people who want to know where the Q50 is going than want to buy the car. The brand sold 8,482 Q50s in the first half of 2021, but just 3,717 units in the first half of this year. The high point came in 2016 when 44,007 units moved that year, two years after the sedan went on sale, and the model heading into 2023 has been hanging on for 10 years. The brand talked about a potential new electrified platform for the sedan in 2018, but come 2021 Nikkei Asia reported parent company Nissan would be ending development of all sedans in Japan excepting the Skyline. The Q50 seems like it's doing circles in a product cul-de-sac, knowing there's no point in revamping the current generation or developing a new one. But the car on sale is just bringing down values; unlike much of the rest of the market, there's real money to be saved on a one- or two-year-old Q50. Perhaps when the electric revolution has some power behind it in 2027 or 2028, we could see a return to the hot Infiniti sedans of yore.   

Race Recap: 2015 US Grand Prix was wet, wild, and historic

Hurricane Patricia made landfall in Mexico this weekend, and made her presence known throughout the South. For two of the three days of the grand prix weekend it rained non-stop in Austin, so badly on Saturday that qualifying had to be postponed until Sunday morning, and then it only stayed dry enough to conduct the first two sessions. At the end of a tricky, slippery Q2 Nico Rosberg had put his Mercedes-AMG Petronas on the front row, one tenth ahead of teammate Lewis Hamilton. The German had done the best he could to keep his hair-thin chances of a World Championship fight alive. Daniel Ricciardo lined his Infiniti Red Bull Racing chassis in third ahead of teammate Daniil Kvyat, both drivers having moved up a place because Ferrari driver Sebastian Vettel took a ten-spot grid penalty for using a fifth engine and dropped to 13th. Continuing the two-up theme, Sergio Perez and Nico Hulkenberg were fifth and sixth for Force India. After that came variety: Felipe Massa in seventh for Williams, Max Verstappen for Toro Rosso in eighth, Fernando Alonso looking good in the rain for McLaren in ninth, and Romain Grosjean for Lotus in tenth. When the lights went out, Turn 1 set the tone. Pole position is on the outside line at Circuit of the Americas, and Hamilton had got himself far enough under Rosberg by the time the two got up the hill that Rosberg had to stick to the outside through the corner. At the corner exit Hamilton used the entire track, pushing Rosberg wide, their cars touching. As Rosberg left the track and dropped back to fourth, Hamilton radioed to the team to say the contact was unintentional. The two Mercedes' and two Red Bulls animated the front. Rosberg passed Ricciardo at the end of a Virtual Safety Car period employed to let the marshals clean the debris at Turn 1. Kvyat started chasing down Hamilton until the Russian ran wide and let Rosberg and Ricciardo through, then Rosberg ran wide on the next lap to let Ricciardo through. On Lap 15, Ricciardo passed Hamilton through the esses to take the lead. After the first round of pit stops the Aussie still had the lead, followed by Rosberg, Kvyat, Hamilton, and Vettel. Then Rosberg got around to take the lead and Vettel closed in on Hamilton as the Brit duked it out with the Russian. Rosberg showed excellent speed, building up a nine-second gap on Ricciardo, but a Safety Car period erased that when Marcus Ericsson had to park his dead Sauber on the inside of the track after Turn 10.