How much horsepower does a 440 Magnum Dodge Charger have?
In factory specifications, a Dodge Charger fitted with the 440 Magnum engine typically produced about 375 to 390 horsepower, with the exact figure depending on year and induction setup (standard 4-barrel versus the Six-Pack options).
Context: The 440 Magnum era and the Charger
The 440 cubic inch V8, marketed as the 440 Magnum, was Dodge’s flagship big-block during the late 1960s and early 1970s. Chargers equipped with this powerplant could be ordered with different induction configurations, notably a single four-barrel carburetor or a performance-oriented Six-Pack (three two-barrel carburetors). The horsepower figures published by manufacturers at that time are “gross” ratings, which are higher than the later “net” ratings used after emissions-era changes. This is why the numbers you see can vary depending on the source and the year of the car.
Performance by configuration
Before listing the typical figures, note that these numbers reflect factory gross horsepower for popular Chargers with the 440 Magnum and differ by carburetion setup. The following ranges are representative of the era’s specifications:
- 440 Magnum with a single four-barrel carburetor (4-barrel) — commonly about 375 horsepower gross, with torque around 480 lb-ft.
- 440 Magnum with a Six-Pack (three two-barrel carburetors) — commonly about 390 horsepower gross, offering higher peak power and torque potential.
- Charger R/T variants — could be ordered with either 4-barrel or Six-Pack setups, placing the output in the 375–390 horsepower gross range depending on year and options.
These figures reflect the era’s gross ratings. Actual performance depends on engine condition, tuning, exhaust setup, and other mechanical factors.
Notes on measurement and terminology
Horsepower figures from the late 1960s and early 1970s were typically listed as SAE gross horsepower, which measures engine output without accessories, exhaust, or alternator losses. In 1971–1972, the industry shifted to SAE net horsepower, which produced lower numbers due to additional drivetrain losses and more stringent testing. As a result, net horsepower for the same engine could be substantially lower than the gross figures cited in brochures. Emissions controls further reduced measured output. When evaluating a specific car, verify whether the listed horsepower is gross or net and identify the exact year and induction setup.
Bottom line: what to expect
For a classic Dodge Charger equipped with a 440 Magnum, you’re generally looking at about 375 to 390 horsepower in factory gross ratings, with the higher end belonging to Six-Pack configurations. If you’re reading older catalogs or owner documentation, be aware of whether the rating is gross or net and the car’s year, since those distinctions materially affect the number you see. Gearing, rear axle ratio, exhaust, and overall condition also influence real-world performance.
Summary
The Dodge Charger’s 440 Magnum engine delivered roughly 375 hp with a 4-barrel setup and about 390 hp with a Six-Pack in its peak years (late 1960s–early 1970s) in gross horsepower terms. Net horsepower figures from the same era would be lower, particularly after emissions controls and the switch to SAE net ratings. The exact horsepower varies by year, configuration, and vehicle condition, so verify the specific car’s induction setup and rating type for an accurate figure.
