Kuàichē Motors (Also known as KM for short) is an American car brand that is owned by someone that is the descent of Chinese and Vietnamese. This is not a real car brand, it was just created for fun.
How engines are named: Engines are named with the letter followed by a 2 digit number. K engines are normal ones. KR ones are racing engines. E ones are electric ones. KTR ones are track racing ones, faster than KR ones. KS ones are specialized engines that usually are handcrafted. The number is for what type the engine is or what generation it is. For example, the KR01T is a turbocharged i6 meanwhile the KR02TT is a twin-turbo V6. The one that goes in front of the number is the modifications. T means turbo, Ti means turbo intercooled, TT means twin-turbo, TTi means twin-turbo intercooled, S means supercharged, ST means super and turbo, STi means super and turbo intercooled, STT means super and twin-turbo, STTi means super and twin-turbo intercooled. There is also bigger engine size that is represented by an E followed by the size in liters. For example, a KR03STiE5.0 means our 3rd KR series engine that is supercharged and turbocharged intercooled with a 5.0 liter engine.
