See also: Hanover Township, Pennsylvania (disambiguation). Hanover is a borough in York County, Pennsylvania, 19 miles (31 km) southwest of York and 54 miles (87 km) north-northwest of Baltimore, Maryland and is 5 miles (8.0 km) north of the Mason-Dixon line. The town is situated in a productive agricultural region. The population was 15,289 at the 2010 census.
Horsepower (hp) is a unit of measurement of power (the rate at which work is done).
RPM and Horsepower. Horsepower is a standard unit for measuring the power of an engine. An engine with a .21ci displacement can typically produce between 2 and 2.5 HP at around 30,000 to 34,000 RPM.