I've done both and was driving big rigs in 1970. Was also a diesel tech. If my history is "obvious" to you with such little information, you must be a pretty lousy researcher.
Your comments about the 855s and 903s are pretty-much meaningless unless you specify which engine models.
But since you seem to favor the 855 engine, you are supporting everything I said, not contradicting it. Did you note where I mentioned stroke versus bore being the main factor with torque?
Note that the 855 is a long-stroke engine with 5 1/2" bore and 6" stroke, and the 903 a short-stroke engine with 5 1/2" bore and only 4 3/4" stroke. That goes along perfectly with what I already stated. So, thanks for supporting my statements, although it seems you either did not read them, or don't understand them.
By the way, one of the best marine Cummins turbo 903s puts out 1200 lbs. of torque at 2200 RPM. Some turbo 855s puts only make 800 lbs.
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Today's Featured Article - Horsepower Defined - by Staff. Indicated Horsepower This represents the power developed in the enine cylinder as obtained from the pressure in the cylinders. This is pressure obtained from an indicator which shows cylinder pressures. Indicated horsepower does not represent the actual useful power delivered by the engine. Brake Horsepower This is the actual horse power delivered by the engine to the shaft. It is equal to the "indicated horsepower" less the friction of the engine. It is useful hor
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