Boonville Horsepower computation ordinance (§ 12-78)

(a) The horsepower of all motor vehicles propelled by gas engines shall be computed and recorded upon the rating established by the association of licensed automobile manufacturers, which formula is as follows:

Square the diameter of the cylinder, multiply by the number of cylinders, and divided the product by two and one-half.

(b) In the computation of fees on commercial motor vehicles, in the case of freight or merchandise motor vehicles the manufacturer's rated live load capacity shall govern and in case of passenger vehicles the capacity shall be ascertained by multiplying the number of adult seating capacity by 150 pounds.