What is the purpose of high horsepower with a small gear ratio?

[KatherineRose]

The purpose of high horsepower with a small gear ratio is to amplify the torque at the driving wheels. Assisting in driving out of difficult situations: In practical usage scenarios, it helps in driving out of tough spots or climbing slopes. For example, when large trucks or buses start climbing a slope, when heavy off-road vehicles navigate through mountains and rivers or wade through water to escape difficult terrain, or when private cars climb steep slopes fully loaded—these situations rely on high horsepower with a small gear ratio to provide high torque. Indeed, it cannot be ignored that under high horsepower with a small gear ratio, the engine operates at very high RPMs, resulting in rough driving quality, high fuel consumption, and relatively low speed. Introduction to horsepower: Horsepower refers to how quickly the engine performs work; higher horsepower means faster work output. Horsepower plays a crucial role in the engine's power characteristics across its entire speed range. It determines the car's continuous acceleration capability and top speed. Torque reflects one-time acceleration ability, while horsepower reflects sustained acceleration ability.