What does H4 engine mean?

[CorbinLynn]

H4 engine refers to a horizontally opposed 4-cylinder engine, which is a structurally unique type of engine. Here is more information about the H4 engine: 1. Using such an engine can lower the vehicle's center of gravity. A lower center of gravity helps reduce body roll, thereby improving the car's cornering speed. 2. There are two automakers that use horizontally opposed engines: Subaru and Porsche. 3. Horizontally opposed engines also have drawbacks. Due to gravity, they are prone to uneven wear.