Single-Cylinder engines are far too good right now. They are extremely cheap and can generate extreme amounts of HP given maximum displacement.
An 8L single can get up to 150HP at 450Nm for very little money. Stick a supercharger on top when that becomes available and this engine easily reaches 200HP, propelling a car beyond 200km/h and acheiving a preposterous 147mpg in 1906...given the miniscule investment necessary, single cylinders are therefore quite OP in the current build. In fact, there is little reason to build any other engines!
An 8L single can get up to 150HP at 450Nm for very little money. Stick a supercharger on top when that becomes available and this engine easily reaches 200HP, propelling a car beyond 200km/h and acheiving a preposterous 147mpg in 1906...given the miniscule investment necessary, single cylinders are therefore quite OP in the current build. In fact, there is little reason to build any other engines!