* Year of manufacture: Engine technology has improved significantly over time. A 1970s 5.7L will have significantly less horsepower than a modern one.
* Manufacturer: Different manufacturers (Chevrolet, Ford, Chrysler, etc.) tune their engines differently, resulting in varying horsepower outputs even with the same displacement.
* Specific model: Even within a manufacturer's lineup, different models (e.g., a performance version vs. a standard version) will have different horsepower ratings.
* Modifications: Aftermarket modifications (camshafts, exhaust systems, etc.) can drastically alter horsepower.
To find the horsepower, you need to specify the make, model, and year of the vehicle containing the 5.7L 4-barrel engine. Then you can look up the specifications in a repair manual or online automotive database.
