Spark ignition engine [S.I. engine]
Petrol engine | Compressor ignition engine. [ C.I. engine]
Diesel engine |
| 1. The mixture of air and petrol is sucked in and compressed in suction stroke | Only air is sucked and compressed. |
| 2. The sparking is done at spark plug in air and petrol mixture and explosion is made. | The explosion occurs when there is spray on diesel in hot air done by the injection nozzles. |
| 3. Spark plug functions in it. | Injection nozzles function here. |
| 4. Light weight engine | Heavy engine. |
| 5. Engine works softly so, vibrations are less. | It rattles more because of vibrations. |
| 6. Need to maintain engine. | Maintenance free engine. |
| 7. When engine works, the carbon less deposits in engine cylinder. | The carbon deposits more in cylinder engine. |
