The hp is not determined from the cc. However there is a relationship between hp and engine volume (CC). For most engines the larger the volume, the greater the hp (this doesn't always hold true however).
150 cc a hp
I was thinking closer to 150 cc but it's not an exact science.
Around 4/5 hp.
No direct equivalent. Engines of same cc may have different hp.
A 179 cc engine is around 5.5-6 horsepower. There's no hard and fast rules on cc to hp conversion there are too many variables.
Seems to be 6 hp.
5 hp
how many cc is a 13 hp
190 cc. is about 5 hp.
This is from movingsnow.com: Here is a simple chart of approximate cc to torque to horsepower conversions. It's not exact, but it will give you a better idea of how big the new engines are. I used 3600 rpm in the formula for this comparison. 179 cc = 5 hp 205 cc = 8 to 9 Gross Torque = 5.5 to 6 hp 250 cc = 11 to 11.5 Gross Torque = 7 to 8 hp 305 cc = 13.5 to 14.5 Gross Torque = 9 to 10 hp 342 cc = 15.5 to 16.5 Gross Torque = 11 to 12 hp
Around 200 cc
3.3 HP