In order for diesel engine cylinder volume of work to do to use the overall assessment of the situation, often using up the concept of power. It said that the demarcation of the conditions in the diesel engine per liter cylinder volume of work issued by the effective power,. Or the greater power that the other conditions being equal, the greater the effective power of the diesel engine to issue or some of the effective power, the smaller the size of the diesel engine. General agricultural diesel engine or the power :12-20 hp / liter.