What are the differences between three-cylinder and four-cylinder diesel engines?
2 Answers
Here are the main differences between three-cylinder and four-cylinder engines: 1. The three-cylinder turbocharged engine has a simpler manufacturing structure, smaller size, and lighter weight compared to the four-cylinder engine. 2. The four-cylinder turbocharged engine performs better in terms of starting, acceleration, and overall stability than the three-cylinder engine. 3. The three-cylinder engine operates in an unbalanced state, making it more prone to vibration compared to the four-cylinder engine. 4. The three-cylinder engine is louder than the four-cylinder engine, and although balance shaft technology is used, the issue still cannot be completely resolved. 5. Four-cylinder engines are typically used in cars with displacements above 1.3L, and due to their larger displacement, they naturally produce more horsepower compared to three-cylinder engines.
I've been driving diesel vehicles for over twenty years and am familiar with both three-cylinder and four-cylinder engines. The three-cylinder diesel engine has one less cylinder, making it lightweight, compact, and space-saving, especially ideal for small trucks. However, the vibration is noticeably strong—you can feel the steering wheel shaking when idling at a red light, and parts wear out faster over time. The four-cylinder engine, with an extra cylinder, offers smoother and more even power strokes, providing a quieter and more stable ride, especially when hauling heavy loads. But it’s bulkier, with higher maintenance and repair costs. For short-distance deliveries, a three-cylinder is fuel-efficient and cost-effective; for long-haul transport, a four-cylinder offers better comfort and durability.
