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Hagerty
Hagerty Employee

A Hurricane Cometh: Stellantis unveils 500+ HP inline-six

Automakers announcing grandiose pivots to lofty electrification forecasts are a dime a dozen these days. Most of these announcements target the next decade-some a bit sooner, some later than that. But what about the next few years? While some have opted to halt ICE development entirely, the folks at Stellantis have decided to make the next few years count in a big way.
https://www.hagerty.com/media/news/with-the-500-plus-hp-hurricane-inline-six-stellantis-presses-paus...
39 REPLIES 39
hyperv6
Racer

I6 engines are great but. 

They are so limited to what they fit in. Between the length and height these engines are pretty much limited to trucks , large SUV and some RWD Jeep’s. 

KenRhodes
Pit Crew

Length is clearly a concern. Height, I'm not so sure. My first new car purchase, while I was in college (with serous financial limits) was a 1963 Plymouth Valiant with its ubiquitous "Slant-6." That engine was remarkable--it was beautifully smooth running, with not a hint of annoying vibrations, and it was bullet-proof. No performance bragging rights, but boy, it sure suited me while I was watching my pennies and toting a few of my friends around.

Why was it a "slant-6?" Simply because Chrysler Corp tilted it over 30 degrees to fit under the hood of their Plymouth Valiant and Dodge Dart models. Since the straight-6 was a relatively narrow design, the tilt just made it take up more width in the engine compartment exchange for less height.
drhino
Technician

I was going to plead for this engine to be mounted with a slight tilt— do they could call it the “Slant Six”. Crap, I missed the opportunity to do that by a couple minutes.
Dond
Intermediate Driver

So the vehicles will need longer hoods? I like it.
elldorado2000
Advanced Driver

BMW seems to do just fine.
CitationMan
Gearhead

My BMW 3 series wagon is only 178 inches long and has a 3.0 liter inline-6 that fits just fine. It’s a wonderfully smooth engine. Low hood line, too.
TG
Technician

Tell that to my 1 Series
erne75
Advanced Driver

Apparently Toyota didnt get your memo when they put the 1jz and 2jz on all kinds of cars in the 90s and early 2000s. BMW has been using I6 engines for the longest time as well.
Your comment was pretty sound until you got to the word "but". You should've stopped there as the amount of misinformation you managed to output on the next two sentences rivals a CNN broadcast.
BMD4800
Gearhead

BMW & Toyota are on line 2…
Billthecat707
Instructor

What else does Stellantis offer in NA. Challenger and Charger will soon be electric. 🤮
MATTMERICA
Technician

Good for Stellantis. Apparently they are aware of the supreme challenges facing anybody going fully EV by 2030, but whatever. There will be a reckoning well before 2030 that the grid and the general infrastructure needed to go full EV is literally decades away. I am still waiting on anybody to explain to me how 101 million people who rent in this country will charge their EVs, but that also doesn't have a plausible answer. As for the engine itself, nothing really new - I can think of five different twin turbo engines V6s that have been around for decades.
MikeB911
Pit Crew

The revolutionary concept of an electric motor using power stored in batteries has only been around since the dawn of the automobile. The big breakthrough that will make range and recharge times competitive with ICE is perpetually 10 years away. Meanwhile, in the real world, we should celebrate developments like 500 hp from 3.0 liters.
MATTMERICA
Technician

Don't get me wrong, I am all for this new engine, but I am not sold on 3 liters. I like my 500+ ICE at 4.4 liters lol
DaveH
Detailer

I've spent a summer in Texas and California each, and no one has explained to me how they expect to charge millions of E cars on top of everything else- when they can barely manage to handle air con running all the time in every single dwelling.
js100
Detailer

The tech is impressive, if it all holds together under real world use (looking at you Ford Eco-boost). Seems like they took a page from the very stout Mercedes straight 6 turbo engine, that powers a bunch of their offerings. Wonder if it uses the same / similar 43 volt tech? Seems like a great start for a mild hybrid / PHEV, with real towing and performance chops.
BMD4800
Gearhead

Wait…a hybrid? No, no, no my Paleolithic cave dweller. We must set aside all carbon and use the magic wall holes for mobility.
MrKnowItAll
Advanced Driver

Electro plated cylinder walls... Vega, anyone?
RokemRonnie
Instructor

Porsche used the same Nikasil process for years without problems. While cylinder wear was an issue, most of the Vega engine's problems were ultimately due to poor heat management, not plated cylinder walls.
TG
Technician

My 944 went to Valhalla with ~250,000 miles
BMD4800
Gearhead

And terrible block porosity issues.
BMD4800
Gearhead

Nearly 50 years later, the process may be better.
Billthecat707
Instructor

It works pretty well for Ford on the 5.2.
Gary_Bechtold
Specialist

A new straight six with turbos, cool. A little too much plastic/composite stuff for my liking but it could work. I want to see it in a sports car and/or sport sedan.
red-on-red
Intermediate Driver


I am a big fan of inline 6 cylinder engines, especially the old Chrysler slant six. This new motor sounds well suited for Ram trucks. Hope they make a standard trans version.
But I think you have the wrong photos in your article, that looks like a dish washer. ... V.
frankherche
New Driver

It Could very well be a SLANT 6. Thats what BMW and Mersedes use to get the straight 6s under the hood. They just don't call it that,
hunternaf
Pit Crew

500 ponies do they make a retrofit to replace my 1965 900lbs 135hp GMC V-6
BMD4800
Gearhead

Spent some time around one of them. Painfully slow. Uncle explained some horses are for racing, some are for show, some are for cowboys (quarter), and some are for work. Those 135 horses were Belgian draft horses compared to the 150 HP 350 powered K10.
Jimmotormedic
New Driver

Sounds to me like there market strategy is to sell on the legacy of the 258 & the 4.0 but I'm not buying it. Even if you build a strong I6 engine platform the bolt on parts are not going to live up to the reliability needed to make it a legacy. I'm willing to sacrifice a few mpgs to gain a reliable 200k power train. Rather than getting 25 or even 30 mpg and having to spend thousands of dollars and having down time.
VADanno
Pit Crew

No mention of fuel economy in 5000 lb vehicles, nor of overall weight with all the turbos and coolers. I wonder if there's any weight savings compared to the Hemi.
bagadonuts
Pit Crew

Was under the impression that a benefit of line engines is the reduced part count for exhaust and emissions equipment. So twin turbos? Are they staged turbos or just twins?
TonyT
Technician

The article says that each turbo feeds three cylinders...
Copbait73
Pit Crew

I’m impressed with the level of commitment Stellantis is showing to technology however when I hear the AL bocks get their diamond surface treatment in the Mexico engine plant I cringe.
Any “welding” operation (cylinder wall treatment) is only as good as the cleanliness of the process.
I have yet to see any high volume production accomplished in this desert environment (fine silica particles everywhere). Time will tell.
Bouskill
New Driver

I am an old man. I remember when the big three meant something, and the sound of a Ford flathead made me excited. I became a mechanic, worked on garbage trucks and school busses and even drove Autocar trucks with two sticks on the floor to gain twenty speeds. I found that gaining a license was the beginning of understanding an engine so it takes ten years to gain a concept. One thing you learn is how inefficient reciprocating engines are and how important flame propagation is in understanding why high speed engines made of aluminum have to run so fast that it makes them waste fuel because the aluminum can not withstand the heat. I also realize so many years later that all the heat from billions of engines all over the world are heating our atmosphere more than it can withstand and this is causing glaciers to fail which supply our rivers with water we need to irrigate our crops. So I acknowledge we need a new plan to make engines retaining the old otto cycle. Such an engine exists with no reciprocating parts. It still uses the otto cycle, and is known as an omega design. We need cars with very small engines to power electric alternators to drive motors or a hydraulic system that would release the brakes and then use a torque converter in each wheel. I wrote a book in 1990 outlining thirty new ideas for a car called "A Tinker's Dream". New engines produced with old ideas won't cut it anymore. We need to start really thinking about what we are doing.
Alejalb54
New Driver

En 1963 salió una pickup Willis con motor hurricane, 4 litros, 6 cilindros en línea con eje de levas en la culata.
Magnífico

.In 1963 a Willys pickup came out with a hurricane engine, 4 liters, 6 cylinders in line with camshaft in the cylinder head. Magnificent
Studenorton
Instructor

Yes, "Hurricane." Because "Go-Devil" was already taken.
Lash
Intermediate Driver

And that's why they're always on the verge of bankruptcy.
Maestro1
Technician

High powered 6 Cyl Engines are a great idea but after reading hyper I wonder about the design restraints and other issues connected with the installation. And I once owned a Valiant with a slant Six and it was inspired engineering. And on the subject of small engines I have two among other cars, I burn less gas and have more fun, and yes, there's nothing like getting behind the wheel of a Hemi...........
puffykins
Pit Crew

Well, if a C class Mercedes can fit a Twin turbo V8, then this engine should be able to fit into almost any car.
mbr2000
Advanced Driver

It's great to hear ICE development is not dead! I love those inline sixes. They're naturally balanced and super smooth. Think BMW 2.8 and 3.0 versions. Also the wonderful DOHC 3.0 engines in 3rd Gen Toyota Supras. I drove several over the years, but sadly never owned one.