Ask what a 6.4 HEMI makes and the real answer is “which one?” Stellantis builds two versions of the 392-cubic-inch V8: a 470–475 hp performance engine for the Durango, Wrangler and new Ram Rumble Bee, and a 405 hp work engine for Ram’s 2500 and 3500 pickups. Our take: the cheapest way into the fast version today is the $50,995 Durango R/T 392, and the engine’s one real weak spot is its lifters.
Quick answer: The 6.4 HEMI makes 475 hp and 470 lb-ft in the 2027 Dodge Durango R/T 392, 470 hp and 470 lb-ft in the Jeep Wrangler Moab 392 and Ram 1500 Rumble Bee 392, and 405 hp and 429 lb-ft in the 2026 Ram 2500 and 3500. Lifter failure tied to cylinder deactivation is its best-known problem.
Last updated: November 2, 2026
6.4 HEMI horsepower: why the numbers don’t match
SRT introduced the 6.4-liter HEMI in 2011 for cars like the Charger, Challenger and Chrysler 300, according to SlashGear’s September 6, 2024 history of the engine. Ram adopted a detuned version for its heavy-duty pickups in 2014, rated at 410 hp and 429 lb-ft.
The two engines share a displacement and little else at the top end. MoparInsiders’ breakdown of the truck engine, which Stellantis calls the BGE or Big Gas Engine, lists a lower 10.0:1 compression ratio, hypereutectic pistons cooled by oil jets, and an intake manifold with runners tuned to make peak power between 3,600 and 5,000 rpm. Lower compression lets the engine run under sustained heavy load with less risk of detonation. Shorter, low-rpm intake tuning trades top-end horsepower for torque where a loaded truck lives.
| Vehicle with the 6.4L HEMI | Horsepower | Torque | Max towing |
|---|---|---|---|
| 2027 Dodge Durango R/T 392 | 475 hp | 470 lb-ft | 8,700 lb |
| 2026 Jeep Wrangler Moab 392 | 470 hp | 470 lb-ft | 5,000 lb (Wrangler max) |
| 2027 Ram 1500 Rumble Bee 392 | 470 hp | 470 lb-ft | 7,460 lb (Ram 1500 with 6.4L) |
| 2026 Ram 2500 Heavy Duty | 405 hp | 429 lb-ft | 17,750 lb |
| 2026 Ram 3500 Heavy Duty | 405 hp | 429 lb-ft | 18,150 lb |
One footnote for truck shoppers. Ram’s April 2024 off-road lineup release rated the HD engine at 410 hp, while Ram’s 2026 Ram 2500 capability page lists 405 hp with the same 429 lb-ft. Ram hasn’t explained the 5 hp drop. MoparInsiders reported that the 2025 heavy-duty refresh brought emissions updates to this engine, which is the likeliest reason, though that’s our inference.
Which vehicles have the 6.4 HEMI in 2026 and 2027?
Stellantis reversed its plan to retire the HEMI after U.S. fuel economy rules changed, SlashGear reported on January 9, 2026. Here’s where the 392 sits now.
Dodge Durango R/T 392
For 2026, Dodge swapped the R/T’s 360 hp 5.7-liter for the 6.4, a jump of 115 hp. The 2027 Durango press kit quotes 0–60 mph in 4.4 seconds, a 12.9-second quarter mile and 8,700 pounds of towing, with standard AWD, adaptive dampers and six-piston Brembo front brakes. The 2027 R/T 392 starts at $50,995.
Jeep Wrangler Moab 392
Jeep put the 470 hp 6.4 back in the Wrangler as the Moab 392, with 35-inch tires, a 4.56 axle ratio and full-time Selec-Trac, per the 2026 Jeep Wrangler press kit. Orders opened in all 50 states on January 15, 2026, at $79,995 plus $1,995 destination. Jeep’s 2027 Wrangler FAQ also lists a Willys 392.
Ram 1500 Rumble Bee 392 and Ram Heavy Duty
Ram’s August 13, 2026 release puts the Rumble Bee 392 at $69,995 and the Rumble Bee 392 Track Pack at $79,995, both plus $2,795 destination, arriving in the first half of 2027. Our Ram Rumble Bee price breakdown covers the full lineup. On the heavy-duty side, the 6.4 remains the only gas engine in the Ram 2500 and 3500.
If you’re shopping a new Dodge Charger for its HEMI, stop: the current Scat Pack uses a 550 hp 3.0-liter twin-turbo SIXPACK six, according to Dodge’s own boilerplate in the same June 2026 release.
What does 6.4 HEMI power cost per horsepower?
Here’s where the price-per-horsepower math gets interesting. All three performance versions make within 5 hp of each other, yet their base prices sit $29,000 apart before destination.
| Model | Base MSRP | Horsepower | Price per hp |
|---|---|---|---|
| 2027 Dodge Durango R/T 392 | $50,995 | 475 hp | $107 |
| 2027 Ram 1500 Rumble Bee 392 | $69,995 | 470 hp | $149 |
| 2026 Jeep Wrangler Moab 392 | $79,995 | 470 hp | $170 |
The Durango wins easily, and it also tows the most. The Wrangler’s premium pays for off-road hardware like 35-inch tires and beadlock-capable wheels, not engine. Here’s the trap with the Rumble Bee 392: Ram’s own 2027 press kit rates a Ram 1500 with the 6.4 at 7,460 pounds of towing, while a 5.7-liter eTorque Ram 1500 tows up to 11,370. If you tow a real trailer, the cheaper engine is the better truck.
How does the 6.4 L HEMI compare with Ford and GM gas V8s?
In heavy-duty trucks, Ram’s 6.4 sits in the middle. Ford’s 2026 Super Duty spec sheet rates the optional 7.3-liter V8 at 430 hp and 485 lb-ft, and Chevrolet lists the Silverado HD’s 6.6-liter gas V8 at 401 hp and 464 lb-ft. Ram’s 429 lb-ft is the lowest torque figure of the three.
Torque is what you feel on a grade with a trailer, so that 56 lb-ft deficit against the Ford matters more than the horsepower gap. Ram’s gas towing tops out at 18,150 pounds in the 3500, against 19,080 pounds for Chevrolet’s gas Silverado 3500HD. If you tow heavy every weekend, our 6.7 Cummins guide explains when the diesel earns its price, and our story on how the 2027 Ford Super Duty drops its base engines covers Ford’s side.
Is the 6.4 HEMI reliable?
Mostly, with one known failure. SlashGear’s owner survey found reports of 150,000 miles common and some engines near 200,000. The recurring complaint is the “HEMI tick,” a failed roller lifter that can take the camshaft with it.
The mechanism matters if you’re buying used. The Multi-Displacement System shuts off four cylinders under light load by using oil-pressure solenoids to collapse their lifters. SlashGear explains that this plumbing restricts oil to the lifters and pushrods until MDS engages, so long idling starves the lifter roller bearings. Once a bearing fails, metal debris circulates and can damage other lifters.
That gives you a used-buyer checklist. Ask for oil change records at or under the scheduled interval, listen for a tick at idle after a cold start, and be wary of work trucks with heavy idle hours on the clock. SlashGear also noted a class action in which owners cited a possible $15,000 engine replacement, so a pre-purchase inspection is cheap insurance. If you’re comparing against GM’s iron-block V8s, our GM 6.0 LS engine guide covers that engine’s weak points.
One limitation: none of the 2026 or 2027 engines has enough miles yet for real-world data, and Stellantis hasn’t said whether it changed the lifter design. We’ll update this guide if it does.
6.4 HEMI questions people ask
How much horsepower does a 6.4 HEMI have?
It depends on the vehicle. The 2027 Dodge Durango R/T 392 makes 475 hp and 470 lb-ft. The Jeep Wrangler Moab 392 and Ram 1500 Rumble Bee 392 make 470 hp and 470 lb-ft. The heavy-duty version in the 2026 Ram 2500 and 3500 makes 405 hp and 429 lb-ft.
What vehicles have the 6.4 HEMI engine?
For 2026 and 2027, the 6.4-liter HEMI is offered in the Dodge Durango R/T 392, the Jeep Wrangler Moab 392, the Ram 1500 Rumble Bee 392 and the Ram 2500 and 3500 Heavy Duty pickups. Earlier versions powered the Charger and Challenger Scat Pack, the Chrysler 300 and SRT Jeep SUVs.
Is the 6.4 HEMI a reliable engine?
Generally yes. Owners commonly report 150,000 miles and some near 200,000, according to SlashGear. The known weak point is lifter failure, often called the HEMI tick, linked to the cylinder-deactivation system’s restricted oil flow at idle. Regular oil changes and less idling reduce the risk.
If you want the 6.4 HEMI for speed, the numbers point one way: the Durango R/T 392 gives you 475 hp, 8,700 pounds of towing and three rows for $50,995, which is $29,000 less than the Wrangler with the same engine.