Six Sells: Stellantis Introduces Twin-Turbo Inline-Six for Ram, Jeep

Matthew Guy
by Matthew Guy
six sells stellantis introduces twin turbo inline six for ram jeep

The auto industry might be moving headlong into all-electrics but that doesn’t mean internal combustion is dead, not by a long shot. Witness the introduction of a brand-new engine from Stellantis, a turbocharged inline-six that will be capable of generating more than 500 horsepower.

Development of this ‘Hurricane’ I-6 was kept on the down-low, at least as much as can be expected during these modern times when everyone has a camera in their pocket. Two variants will be available when the engine goes into production and pops up in showrooms later this year.

Stellantis says the Hurricane will offer its twin-turbo muscle using a broad and flat torque band, one which will see this mill maintain at least 90 percent of peak torque from 2,350 rpm all the way to its red line. Specific horsepower numbers will vary based on vehicle application, but the Standard Output will make somewhere in the neighborhood of 400 horses and 450 lb-ft while the extra-boosted High Output should knock on the door of 500 ponies and 475 units of twist.

Each turbocharger in the Hurricane twin-turbo I-6 feeds three cylinders, passing compressed air through an engine-mounted water-to-air charge air cooler to reduce its temperature before entering the intake manifold. The turbos on the Hurricane SO deliver a peak boost of 22 psi, while snails fitted to the Hurricane HO deliver 26 psi of peak boost.

And to answer the inevitable questions from gearheads in our audience: There is a difference in compression between the two brothers. Standard Output engines use cast aluminum pistons with a cast iron top ring land insert, running a 10.4:1 compression ratio. High Output variants deploy forged aluminum pistons with an anodized top ring land and a diamond-like coating on the pins, resulting in a 9.5:1 compression ratio on 91 octane premium fuel.

Bore, stroke, and cylinder spacing are shared with the globally-produced 2.0-liter turbocharged four-banger currently found in rigs like the Cherokee and Wrangler 4xe. The latter gives us a clue that this engine is likely to see a plug-in hybrid variant of some sort in the future. The non-electrified engine announced today will be assembled in Mexico.

Where will we see this engine? Stellantis ain’t saying other than to state the Hurricane twin-turbo I-6 is the primary internal combustion power plant of the future in North America for vehicles using the STLA Large and STLA Frame platforms. The smart money has it showing up in the Wagoneer, usurping the V8 and fitting the silky-smooth mandate of that luxury SUV very well. Logic dictates we’ll see it in Ram pickup trucks as well, with the venerable 5.7L Hemi (which has made 395 horsepower ever since Adam was an oakum picker) likely to soldier alongside in the short term, at least in the Ram 1500 Classic. This strategy is not without precedent since Ford has long offered turbo six-cylinder engines alongside the 5.0L V8 in its F-150. The octopot now comprises but a small portion of F-150 sales.

[Image: Stellantis]

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  • MrIcky MrIcky on Mar 28, 2022

    I'm just glad it's an I6 instead of a v6. They sound better, they feel better (smoother), fewer parts, etc. And I like the idea of the 2.7 in the canyon, I think that would be impressive.

  • 1337cr3w 1337cr3w on Mar 29, 2022

    So when the CX-5 is inevitably phased out at the end of this generation, we'll have a more expensive replacement in the CX-50 with worse driving dynamics (thanks to the torsion beam), visibility, NVH, and seat comfort. Why can't the US get a Mazda hybrid? The CX-60 looks pretty nice

  • El scotto Huge lumbering SUV? Check. Unknown name soon to be made popular by Tiktok ilk? Check. Scads of these showing up in school drop-off lines? Check. The only real over/under is if these will have as much cachet as Land Rovers themselves? A bespoken item had to be new at one time. Bonus "accepted by the right kind of people" points if EBFlex or Tassos disapproves.
  • El scotto No, "brothers and sisters" are the core strength of the union. So you'll take less money and less benefits because "my company really needs helped out"? The UAW already did that with two-tier employees and concessions on their last contract.The Big 3 have never, ever locked out the UAW. The Big 3 have agreed to every collective bargaining agreement since WWII. Neither side will change.
  • El scotto Never mind that that F-1 is a bigger circus than EBFlex and Tassos shopping together for their new BDSM outfits and personal lubricants. Also, the F1 rumor mill churns more than EBFlex's mind choosing a new Sharpie to make his next "Free Candy" sign for his white Ram work van. GM will spend a year or two learning how things work in F1. By the third or fourth year GM will have a competitive "F-1 LS" engine. After they win a race or two Ferrari will protest to highest F-1 authorities. Something not mentioned: Will GM get tens of millions of dollars from F-1? Ferrari gets 30 million a year as a participation trophy.
  • El scotto None of them. The auto industry is full of people with huge egos. It's a case of huge ego = never ever being wrong.GM: The true believers end up at Bowling Green. A fast rising GM executive that just didn't quite make it: Truck & Bus, Fort Wayne isn't really that far from Detroit!Ford: Billy Ford once again, and it seems perpetually, convincing his doubtful relatives not to sell their preferred stock. I give VW a 50/50 shot at buying out Ford; a family buying out another family.Tesla: Straight from Elon: "My Tesla has hidden compartments for handcuffs, ask my latest girlfriend where they're located"Stellantis: Get used to flying to Schiphol. You'll have luggage, lots of luggage.None of the Big 3 will ever admit they were wrong. Tesla will just keep gaining market share.
  • SCE to AUX A question nobody asks is how Tesla sells so many EVs without charge-at-home incentives.Here are some options for you:[list][*]Tesla drivers don't charge at home; they just squat at Superchargers.[/*][*]Tesla drivers are rich, so they just pay for a $2000 charger installation with the loose change in their pocket.[/*][*]Tesla drivers don't actually drive their cars much; they plug into 110V and only manage about 32 miles/day.[/*][/list]