| Induction Motors | Synchronous Motors | |
| Speed | The speed varies below the synchronous speed and can be adjusted | The speed is constant and rotates at the synchronous speed |
| Construction | Simple and Rugged Construction | A slightly complex construction |
| Starting | It is self starting | Special Starting Procedures are required |
| PF control | Cannot be used for PF improvement | Can be used for PF improvement |
| Excitation | Does not require external excitation | Requires DC excitation for rotor |
| Efficient | Less Efficient | More Efficient |
| Cost | Cheaper | More expensive |
