There is no way of answering this question accurately, as there is no direct correlation betwen cubic centimeters and horsepower. In addition, horsepower is also a function of engine rpm. For example, one engine of 139cc at 2000 RPM might develop X horsepower, but another engine with 139cc at 2000 rpm might develop X+2 horsepower.
746 watts equals one horsepower.
1kW = 1.341hp
1.341hp per kW
Looks like it is about 6.5 HP
мотокультиватор expert 139cc
1.2 hp = 894.839846 watts
I horsepower equals 1/315th of 315 horsepower
800 newtons = 3/4 HP
Doesn't work that way, no way of telling.
746watt
746 watts equals one horsepower.
I'm not an expert by any means but your dealing with apples and oranges. Horsepower is of course a measure of power whereas cc is a measure of displacement. I don't know what is the equivalent of horsepower in the metric system.