When selecting a Zetor tractor, you must prioritize engine performance and emission standards. Ensure the engine meets Stage V or Tier 4 Final requirements for European or North American markets. Key specs include horsepower (HP) range (typically 40 to 170 HP), torque backup (ideally 30% or higher), and transmission type (e.g., mechanical, power-shift, or power-shuttle). For heavy-duty tasks, verify the hydraulic pump capacity (L/min) and rear lift capacity (kg) to ensure compatibility with your implements.