Difference between petrol and diesel engine

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                                   Way Fuel Burns

1. 
   •  Petrol easily evaporates 
   • Diesel does not easily mix with air
   • Petrol and air pre-mixed 
   • Diesel mixed during combustion
               
   
   
   • Petrol engine  acts as  spark plug
   • Diesel engine acts as Fuel injector
   • Diesel-> More vibration
   • Petrol-> Less vibration
   • Diesel-> Uncontrolled
          Petrol-> Controlled

1.    Petrol engine is more light weight
2. Petrol can't provide higher compression ratio
3. Diesel has good CR
4. Higher efficiency of petrol engine

• High speed engine with operating speed: 3000 RPM to 6000 RPM
• Diesel engine: 400 to 3500 RPM
• Petrol engine is easier to start
• Cranking effort is more in diesel engine
• Petrol: Less initial cost and maintenance,higher power
• Diesel: Longevity, good torque, low running cost
• Petrol:  light weight vehicles
• Diesel: Heavy vehicles