How do you convert cubic inches to horsepower?

Answer 1

You can't convert cubic inches to horsepower. more cubic inches usually mean more horsepower but it horsepower is determined by more than displacement (i.e turbo chargers and engine internals).

You can find horsepower per cubic inch by dividing horsepower by cubic inch, but there is no way to use just cubic inches to determine horsepower

Answer 2

Horsepower is a measure of power. Typically it is used to rate motors and engine power capability. Cubic inches is a measure of volume. From the context, this most likely refers to engine displacement (sum of all cylinder displacements).

There are other factors than just displacement that determine a particular engine's horsepower capability, however.

Answer 3

123 cubic inches

Answer 4

88