In the course of more than two years the Zetor 25 gathered a lot of operational experience in different countries. The result of the modernization based on this experience was the Zetor 25 A (differentiated from the model 25 K) in 1949, with several benefits: an improved dashboard including a temperature gauge, a comfortable upholstered seat, three-point hydraulic hitch, cab to order, differential lock and adjustable front and rear wheel base.