* Engine design: Different manufacturers have different designs, leading to varied power outputs even with the same displacement.
* Year of manufacture: Engine technology improves over time, resulting in higher horsepower for newer models.
* Aspiration: Naturally aspirated engines (no turbocharger or supercharger) produce less horsepower than forced induction engines.
* Modifications: Aftermarket modifications can significantly increase or decrease horsepower.
A 5.7L engine could produce anywhere from under 250 hp to over 400 hp depending on these factors. To know the horsepower of a *specific* 5.7L engine, you need to know the make, model, and year of the vehicle it's in.
