Who makes the Ram 6.4 engine?
The Ram 6.4-liter HEMI V8 is built by Stellantis (the multinational automaker formed from Fiat Chrysler Automobiles) for Ram trucks and related performance variants.
In more detail, the 6.4 L HEMI — often referred to as the 392 HEMI — is a naturally aspirated V8 used in Ram heavy‑duty pickups and select FCA performance models. It is developed and produced by Chrysler’s powertrain operations at North American engine plants, with its lineage rooted in the broader HEMI family.
What is the Ram 6.4 HEMI V8?
The Ram 6.4 HEMI V8 is a 6.4-liter, naturally aspirated V8 that delivers strong performance for heavy‑duty trucks and high‑torque applications. It is part of the HEMI family and has been used in Ram’s HD lineup as well as in various FCA performance configurations over the years. Power and torque vary by application and model year, but it is commonly cited around the low- to mid‑400 horsepower range with substantial torque to match Ram’s hauling capability.
Specifications
The following highlights describe the engine in broad terms and across its typical Ram applications.
- Displacement: 6.4 liters (392 cubic inches)
- Configuration: V8, naturally aspirated
- Valvetrain: 32 valves (4 per cylinder)
- Performance range: roughly 410 hp and 429 lb-ft of torque, varying by model year and tuning
- Signature: part of the HEMI family, used in Ram heavy‑duty and select performance variants
Though the exact figures shift with model year and vehicle configuration, the 6.4 HEMI is consistently described as a high-output, durable powerplant designed to handle demanding towing and payload tasks in Ram’s HD lineup.
Applications
The 6.4 HEMI is employed primarily in Ram’s heavy‑duty trucks and certain high‑performance or off‑road variants within FCA’s lineup, offering strong low‑end torque and confident acceleration for work duties and off‑roading.
- Ram 2500 Heavy Duty models
- Ram 3500 Heavy Duty models
- Ram Power Wagon variants and other high‑torque configurations
- Historical FCA performance applications (e.g., in certain SRT vehicles) where the 392 HEMI nameplate originated
Across generations, the engine’s role has been to provide robust torque for towing, payloads, and off‑road capability, while balancing reliability in demanding work environments.
Manufacturing and Production
The Ram 6.4 HEMI is produced by Stellantis as part of its North American engine-building operations. Stellantis maintains multiple powertrain plants in the United States and Mexico to support Ram and other brands, and the 6.4 L HEMI is built at one or more of these facilities depending on production needs and year.
- Manufacturer: Stellantis (Chrysler) — HEMI family presenter and builder
- Primary production regions: North America (United States and Mexico)
- Typical applications within Ram’s lineup: HD pickups and specific high‑torque variants
- Historical context: part of FCA’s HEMI heritage, later integrated under Stellantis after corporate restructurings
Production details are closely tied to Ram’s model year offerings and market demand, with the engine serving as a cornerstone for high‑torque, heavy‑duty performance.
Historical Context
The 6.4 L HEMI, often branded as the 392 HEMI, represents a modern continuation of the long-running HEMI lineage that began in the 1950s with hemispherical combustion chambers. In the Ram era, the 6.4 L variant gained prominence for its combination of displacement, torque, and broad applicability in heavy‑duty trucks and performance‑oriented FCA models. The name and technology reflect FCA’s emphasis on a high‑output, durable V8 that can power both demanding work duties and high‑performance variants under the HEMI umbrella.
Summary
The Ram 6.4 engine is manufactured by Stellantis (the parent company of Ram) as part of its modern HEMI V8 family. It is engineered for heavy‑duty Ram trucks and select performance applications, delivering strong torque and notable horsepower for towing, payload, and off‑road use. As with other FCA/STELLANTIS powertrains, the 6.4 L HEMI represents a bridge between traditional V8 reliability and contemporary high‑output requirements in North American production facilities.
In Brief
Key takeaway: The Ram 6.4 is built by Stellantis (Chrysler) in North American plants, forming the backbone of Ram’s high‑torque, heavy‑duty powertrain offerings.
Note: Model-year specifics (power, torque, and available variants) can shift with updates to Ram’s lineup, so consult official specifications for the exact figures on a given truck or year.
Summary end.
