Unlike many other T-72 upgrades, the Polish Army PT-91s are upgraded using elements created almost exclusively by domestic companies, including a new engine, the fire control system and all communication system elements.
与其他许多T-72改进型不同，波兰陆军的PT-91在升级中所使用的部件几乎全部是本国企业制造的（包括新型发动机、火控系统和所有通信系统组件）。