2003 Infiniti M45 Base Sedan 4-door 4.5l on 2040-cars

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A look inside Infiniti's variable-compression engine

We're sympathetic to anyone who had trouble understanding what's going on with Infiniti's new variable-compression engine. While we got a full tech briefing on the novel VC-Turbo back in August, the visual aids were lacking. The cutaway engine Infiniti brought to the Paris show fixes all of that. You can thank the little green and pink lines on the cutaway for making the whole idea a little more clear. Click through the gallery to see two lines – one green and one pink – that represent the different strokes allowing for different compression ratios. Remember, the compression ratio is the amount of volume in the cylinder on intake compared to the amount at the end of the compression stroke. Leave more room at the end and you lower that ratio. The length of the stroke doesn't change with this system, but where it sits along the cylinder does. Hence those two lines. The variable compression ratio allows this new turbocharged engine to maximize fuel economy when the turbo isn't needed by raising the compression ratio. It will see its first use in the next Infiniti QX50 crossover, previewed by the QX Sport Inspiration concept that's also on display in Paris, and has performance targets of 268 horsepower and 288 pound-feet of torque. After, it will migrate to other Infiniti and Nissan vehicles, with transverse front-drive-based applications first in line. Eventually, it's likely to completely replace Nissan's corporate 3.5-liter V6. We'll be poking around the engine a little more in Paris today to try and get some more info. For now, enjoy those cutaway images and those friendly little lines. Featured Gallery Infiniti VC-Turbo engine cutaway View 14 Photos Paris Motor Show Infiniti Nissan Technology Emerging Technologies engine 2016 paris motor show

Reveling in the reveals: BRZ, Civic, Wrangler, QX55

It’s almost like there should have been an auto show this week. If youÂ’re an enthusiast, you know the week before Thanksgiving is when the Los Angeles Auto Show kicks off. This year, thereÂ’s no L.A. show, at least until next May. But Subaru, Honda, Jeep and Infiniti rolled out significant new products this week, making us almost nostalgic for auto shows. Serendipity, or more likely previously allocated marketing budgets, gave us a familiar feel of new products, even though we couldnÂ’t feel or touch them under the bright lights of the Los Angeles Convention Center. LetÂ’s break them down: 2022 Subaru BRZ 2022 Subaru BRZ View 62 Photos Subaru stuck to basic formula here: The 2022 BRZ remains a rear-wheel drive sports coupe thatÂ’s supremely lightweight, adequately powered and attractive. Subaru debuts its new boxer four-cylinder in the BRZ. ItÂ’s rated at 223 hp and you need to rev all the way to 7,000 rpm to achieve that output. I'd prefer a bit more than the 184 lb-ft of torque the powerplant offers (reasonably low in the band at 3,700 rpm), for some more off-the-line grunt. Say 200 lb-ft, though itÂ’s almost a cliche to argue the BRZ is underpowered.  The outgoing BRZ is one of the purest cars IÂ’ve driven, so rather than harp on the power, which will ultimately be fine, give Subaru props for focusing on chassis improvements to improve rigidity by 60 percent and aid turn-in. Admirably, the curb weight is less than 2,900 pounds, and the manual in Premium trim checks in at the lowest, just 2,815 pounds.  Aesthetically, I like it. ItÂ’s busier than before, and thereÂ’s a lot more going on with the front fascia, wheel arches and fenders. ThereÂ’s a bit of a Porsche vibe up front, which is good, and a bit of a Honda Civic vibe in back (think 2010) thatÂ’s not.  ItÂ’s impressive that Subaru resisted the urge to gratuitously power up the BRZ and remained focused on the essence of its goodness and appeal to enthusiasts. 2021 Jeep Wrangler 392 2021 Jeep? Wrangler Rubicon 392 View 75 Photos What effect will the 2021 Ford Bronco have on the Jeep Wrangler? One school of thought is that it will actually make the Jeep better, and the 2021 Wrangler 392 is proof positive that will be the case. With the Bronco attracting spectacular levels of attention, Jeep could not sit idly by and remain focused on incremental changes. It needed to make a splash.

Infiniti Q Inspiration inspires electrified vehicle platform

This year's Detroit Auto Show was a bit light on forward-looking concepts, so the Infiniti Q Inspiration was a highlight, what with it's gorgeous curves and elegant interior. And lucky for us, Infiniti has decided to bring the lovely sedan to production. It will have a substantial difference to the concept, though ... The concept version used the variable-compression turbocharged four-cylinder from the QX50, which was a bit of a surprise considering the car's grille was nearly filled in. The production Q Inspiration will eschew the purely internal combustion engine for an electrified powertrain. Infiniti hasn't given any details, but that wording seems to indicate that it will be some kind of hybrid, or — less likely — an EV. Supporting the hybrid theory is the fact that Infiniti plans on putting this new sedan into production within five years. Infiniti has previously announced that its first full EV will launch in 2021, which is just three years out. That being said, we wouldn't preclude the possibility of a full EV Q Inspiration later on, or even a plain internal-combustion model, since the idea behind the original concept was that it could support multiple powertrains. Besides being another vehicle to help Infiniti reach its electrified vehicle sales goals for 2025, it will also be built in China. "We very much had China in mind when designing the Q Inspiration," said Infiniti Chairman and Global President Roland Krueger." Four more Infiniti models will also be built in China following this sedan. Related Video: This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings.