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Unless I am being singularly obtuse... 1hp electric = 1hp diesel.

There may be discrepancies between the accuracies of the manufacturers measurement methods, tolerances, etc but they should be approximately the same.

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A diesel may have to be de-rated for height above sea level and temperature. I cannot remember the detail anymore but I am sure there is a ISO standard for it. Google for "Diesel de-rating".

A long time ago the manuals gave all the detail.

The HP developed by any motor is a function of torque X speed. Each type of motor will have a torque:speed curve. The point at which the product of the two produces the maximum value within the limits of design is the maximum power which can be obtained without overstressing the motor. Electric motors have a flatter torque curve than the typical diesel or gasoline motor, and therefore may produce more power at lower speeds or higher speeds, as fueled motors typically have inverted "U" shaped torque curves and skewed inverted "U" shaped power curves. As such, a 5 HP diesel motor is rated at 5 HP only because it has the capability to produce 5 HP at a certain speed, whereas a 5 HP electric motor can produce 5 HP (or more) over a wider range and is rated at 5 HP due to temperature limits of winding insulation.

Hi sush apc,

Electric power = volts x Amps =watts

1 HP is approximately 750 watts if I recall correctly.

So a 1.5Kw electric motor is equivalent to a 2 H.P. motor

Hope this helps.

As far as I remember : I do agree to the previous mails. There are a few "extra's" to remember.

1 HP is always 1 HP no difference what so ever. Butttt be aware what kind of HP's DIN - SAE. For petrol engines use the DIN norm this is the usable krankshaft output

Secondairy the electric ones. Volt * Ampere = Watt. 736 Watt = 1 PK / HP but rememer the cosinus factor. for exaple 0.8

Best regards

Peter