Litre engines are typically found in small cars and motorcycles. They are also sometimes used in larger vehicles, such as trucks and SUVs, but these vehicles typically have larger engines as well.
The size of an engine is not the only factor that determines its power. Other factors include the number of cylinders, the compression ratio, and the turbocharger or supercharger. However, displacement is a good indicator of how powerful an engine will be.
Litre engines are often more fuel efficient than larger engines. This is because they use less fuel to produce the same amount of power. However, litre engines can also be less powerful than larger engines.
Ultimately, the best engine for a particular vehicle depends on the needs of the driver. A litre engine may be a good choice for someone who wants a fuel efficient car or motorcycle. A larger engine may be a better choice for someone who wants a more powerful vehicle.