One of the important tasks in the design of reciprocating compressors is ensuring low vibration of the compressor in all operating modes. A variable summand of the rotary mechanism reaction torque, in particular that of the reciprocating compressors, is one of the main sources of their low-frequency vibration. The paper presents research results concerning the influence of different structural parameters on the torque diagram. The authors describe the structural solution aimed at obtaining the most uniform constant-sign diagram of the torque of a multistage reciprocating compressor. The description of a computer program that was specifically developed for this study is given. The developed program makes it possible to carry out calculations for various compressor designs. For this, the authors developed a row designer, which allows taking into account the mutual arrangement of cylinders and the arrangement of steps in rows.