Tweet   K(kei) cars are light small cars in Japan. They often come 4wd and Turbocharged. Usually making stock around 63-64 HP.. Daihatsu, Suzuki, etc. The Displacement is Usually 660CC. After World War II, Kei car was born as the public car. The engineer of Nakajima Aircraft Company produced Subaru 360 You can however modify them and make well over 100 HP they are so light that it makes up for the low More..power.