A tractor engine is the power source of a tractor, designed to perform heavy-duty agricultural tasks like plowing, tilling, and hauling. These engines are typically diesel-powered, known for their durability, torque, and fuel efficiency. Tractor engines range in power from around 15 to over 600 horsepower, depending on the tractor's size and intended use.

Key features of tractor engines include:

1. **High Torque:** Designed to provide strong, consistent pulling power at low speeds, which is essential for tasks like plowing and dragging heavy equipment.

2. **Durability:** Built to withstand harsh working conditions and long operating hours, often with reinforced components and advanced cooling systems.

3. **Fuel Efficiency:** Diesel engines are preferred for their fuel efficiency, especially important in agriculture where tractors often operate for long periods.

4. **Emission Control:** Modern tractor engines often include technologies like turbocharging and exhaust after-treatment to meet emission standards.

5. **Ease of Maintenance:** These engines are designed to be relatively easy to maintain, with accessible components and robust construction to minimize downtime in the field.

Overall, a tractor engine is a vital component that combines power, reliability, and efficiency to handle the demanding tasks required in agriculture and other heavy industries.