The term "multiple displacement" is sometimes used loosely and can be confusing. It might be mistakenly applied to the Hemi's design because it has several features that *indirectly* affect engine output and efficiency, but none that directly alter the engine's displacement (which remains a constant 5.7 liters). These features include:
* Variable Valve Timing (VVT): The Hemi uses VVT to optimize valve timing based on engine load and speed. This improves both power and fuel economy by allowing for more efficient intake and exhaust cycles, but it doesn't change the engine's displacement.
* Multiple Throttle Bodies (on some applications): Some versions of the 5.7L Hemi might use multiple throttle bodies for better air intake distribution across the cylinders. This enhances performance but is not a form of "multiple displacement".
* Fuel Management Systems: The engine's sophisticated fuel injection and management system adjusts fuel delivery to optimize combustion based on various parameters. This affects fuel efficiency and power output, but it does not change the engine's displacement.
In short, the 5.7L Hemi is a fixed-displacement engine. It always uses all eight cylinders. While it employs advanced technologies to optimize performance and efficiency, it doesn't have a system that actively varies its displacement. If someone referred to it as having a "multiple displacement system," they are likely misusing the term or referring to one of the above-mentioned features in a misleading way.
