Depend on the type/use of the 163cc engine. A 163cc Honda engine is rated at 4.3-4.8hp depending on model. While a 163cc go kart engine has a rating of 5.5-6.5hp.
How much horsepower is 439
how much hp is 140cc
CC is a VOLUME, -the capacity of that engine. It has NO relationship whatever to horsepower, which is totally different
About 6.5 hp.
how much cc's is a 6.5 hp engine
110 HP
1000 hp
About 27 hp
17 hp
160 hp
39 HP