Top 10 Reasons Why Diesel Engines are not Used in Bikes?


We all are bike lovers. We use a bike many times in a day. Usually, the bike is run by petrol. The price of petrol is higher than diesel in many countries. Sometimes we think, why the bike is not run by diesel. If there is a diesel bike than we can save some money. Today I am going to tell you some reasons why diesel engines are not used in bikes.

  1. The diesel engine has a compression ratio 24:1, which is higher than the petrol engine compression ratio of 11:1. Diesel engines must be bigger and of heavy metal in order to handle this high compression ratio. That’s why the diesel engine is heavier than the petrol engine and not suitable for a small vehicle like a motorcycle.
  2. Due to a high compression ratio, the diesel engine produces more vibration and noise as compared to the petrol engine. It is not possible for a light vehicle to handle this high vibration and noise. That’s why diesel engines are not used in a motorcycle.
  3. 3. Due to the high compression ratio and heavy engine, the initial price of the diesel engine is more than the petrol engine. And this initial price difference is about 50,000 rupees, which is not suitable for a small vehicle.

4. Diesel engine produces approximately 13% more carbon-di-oxide per gallon as compared to the petrol engine. So it makes greater pollution than a petrol engine and it is not good to use for the environment.

5. Diesel engine works on high pressure, so wear and tear is high in diesel engines. To reduce this wear and tear oil change are frequently required at every 5,000 kilometers instead of 10,000 kilometers in the case of a petrol engine.

6. The diesel engine produces more torque but low rpm than the petrol engine. So in bikes where we need high speed, it is not suitable.

7. Diesel has high energy per gallon as compared with petrol. When diesel burns, it produces a large amount of heat which can destroy walls of the cylinder and other parts of the engine. So to reduce this heat, we need a greater surface area and a proper cooling system. In order to achieve this greater surface area, the engines are made slightly bigger.

8. The diesel engine uses a turbocharger or supercharger to pump more air into the cylinder, which increases its price and size. 

9. In diesel engines, injector technology is used to inject fuel into the combustion chamber, which is more expensive than the spark plug technology of the petrol engine.

10. A diesel engine is very big as compared with the petrol engine and it uses high power starting motor to crank the engine, which is not suitable for motorcycles.

After all these disadvantages some manufacturers like Royal Enfield have succeeded to manufacture diesel engine bikes and maybe, after some years these bikes can replace all petrol bikes. 

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Published by
The Engineer

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