How many cylinders are there in the engine of a semi truck?

The number of cylinders in the engine of a semi truck varies depending on the make and model of the truck. Most semi trucks have engines with either 6 or 8 cylinders, but some models can have up to 12 or even 18 cylinders. The larger the engine, the more power it will produce. However, larger engines also tend to be less fuel-efficient than smaller engines.