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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

Will Nissan's Cummins deal upset Ram's marketing mojo? [w/poll]

Ram has used Cummins engines in its heavy duty trucks since 1989, and it is the only pickup truck brand to use products from the Indiana-based engine maker. With the announcement that the next Nissan Titan will also use a Cummins powerplant, and a Nissan spokesman having already said "We will definitely leverage the Cummins brand name," a piece in Automotive News wonders whether the deal will affect the way Ram markets its tie-up with Cummins.
The question really is, how intense is this competition? While it is the first time that trucks from two different brands have used Cummins engines, they'll be two different engines in two different kinds of trucks; Nissan is going to put a 5.0-liter turbodiesel in a non-heavy-duty Titan, Ram only uses its 6.7-liter, inline six-cylinder turbodiesel in heavy-duty offerings. The diesel that Ram will offer in its light-duty, half-ton 1500 is a 3.0-liter V6 EcoDiesel with 240 horsepower and 420 pound-feet of torque - compared to about 300 hp and 550 lb-ft expected from the Titan's Cummins - and its marketing so far has focused on the fuel economy gains.
If Nissan was going to prove its commitment to the segment, it had to do something compelling. If we're talking about sales competition between Ram and Nissan, Ram has sold 201,633 trucks as of July this year, up 24.2 percent, 31,314 of those sales coming last month; Nissan has sold 10,020 Titans through the end of July, down 21.1 percent, and just 1,168 in July itself. Nissan's new truck boss - who hopped there from Ram - said that buyers have asked for a powerful turbodiesel in something other than a heavy duty pickup, and from what we've read on various comment boards, the pickup truck crowd is excited about Nissan's move.

Nissan Z Proto, next-gen Hyundai Tucson and a hi-po mystery Bronco | Autoblog Podcast #645

In this week's Autoblog Podcast, Editor-in-Chief Greg Migliore is joined by Senior Editor, Green, John Beltz Snyder and News Editor Joel Stocksdale. In the news this week, Ford has teased some sort of high-performance Bronco, Nissan unveiled the Z Proto, Hyundai revealed the next-gen Tucson and GMC teased the Hummer EV's "Crab Mode." Our editors break that all down for you, and share some insights and opinions before they turn to the cars in their own driveways. This week, they've been spending time with the 2020 Mercedes-AMG G 63, as well as the 2020 BMW Alpina B7. Autoblog Podcast #645 Get The Podcast iTunes – Subscribe to the Autoblog Podcast in iTunes RSS – Add the Autoblog Podcast feed to your RSS aggregator MP3 – Download the MP3 directly Rundown Ford's beefed-up Bronco prototype stars in new teaser photo Nissan Z Proto previews the retro, rear-drive, turbo, manual future of the Z All the Nissan Z cars that got us to the Z Proto 2022 Hyundai Tucson debuts with striking styling inside and out GMC Hummer teases crab mode, reveal set for Oct. 20 Cars we're driving: 2020 Mercedes-AMG G 63 2020 BMW Alpina B7 Feedback Email – Podcast@Autoblog.com Review the show on iTunes Related Video: