How much horsepower does a 1973 Dodge Charger 400 have?
A 1973 Dodge Charger 400 with the 400 cubic-inch V8 typically produced about 250 horsepower in gross ratings, with SAE net ratings generally around 180–190 horsepower depending on the exact configuration and emissions equipment.
Engine options and horsepower in the 1973 Charger 400
In 1973, the Charger 400 was centered around the 400 cu in V8, available in more than one carburetion setup. The 4-barrel version is the one most associated with the “400” designation and higher output, while a 2-barrel variant delivered somewhat less power. Horsepower figures depend on whether they’re quoted as gross or net and on the car’s specific equipment, including compression, cam, exhaust, and emissions controls.
Here are the typical horsepower ranges by carburetion setup:
- 400 cubic-inch V8 with 4-barrel carburetor: commonly around 250 horsepower gross; SAE net figures typically in the 180–190 horsepower range depending on configuration.
- 400 cubic-inch V8 with 2-barrel carburetor: lower output, roughly in the 180–210 horsepower gross range; net figures generally in the 150–170 horsepower range depending on equipment.
Concluding paragraph: The exact horsepower for a given vehicle depends on its specific build, exhaust setup, and emissions equipment. Historical brochures and tests show a gap between gross and net figures, and real-world performance could vary accordingly.
Understanding horsepower ratings (net vs gross) and how it applies to the 1973 Charger
Horsepower figures from this era can be expressed as gross horsepower (engine tested with minimal accessories) or SAE net horsepower (engine plus production accessories and emissions controls). In 1973, SAE net ratings were generally used for production cars, which yields lower numbers than the earlier gross ratings. This distinction is important when comparing numbers from different sources or restorations.
- Gross horsepower: higher numbers, often cited around 250 hp for the 4-barrel 400 V8.
- Net horsepower: lower numbers, typically around 180–190 hp for the same engine in production form.
Concluding paragraph: For an exact horsepower figure on a specific 1973 Charger 400, consult the original build sheet or factory documentation, since configuration, emissions equipment, and date of manufacture can shift the rating.
Summary
The 1973 Dodge Charger 400’s horsepower centers on the 400 cu in V8. Depending on carburation, the engine produced roughly 250 hp gross and about 180–190 hp in SAE net ratings, with 2-barrel configurations yielding lower numbers. Always verify whether the source uses gross or net ratings, and check the vehicle’s original paperwork for the precise figure.
