This 400-HP, 20-Cylinder Flat-X Engine Is One of the Wildest Things in Internal Combustion. ... Gordon Murray once said that anything with more than 12 cylinders is just plain showing off.

The volume of a cylinder is π × r² × l (r is the radius of the circle and l is the length of the cylinder). To calculate the volume we multiply these values together.

The goal of 21st-century cylinder head engineering is controlling and managing the combustion process by combining radical combustion chambers with new port layouts to improve mixture motion.