LPG Conventional Kit

Just like CNG Conventional Kit, LPG i.e. Liquefied Petroleum Gas is also a great way to cut on fuel prices for your car. However, since CNG is considered to be safer and service-friendly a large number of car drivers are willing to run cars on CNG only. Both LPG and CNG are much cleaner fuels than petrol or diesel.

Similar to CNG Conventional Kit, LPG Conventional Kit’s installation is done. The difference between CNG and LPG cars is primarily just the fuel. Petrol and diesel vehicle owners contemplating conversion to CNG and LPG should also be aware of the differences.

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CNG is compressed natural gas – methane.
LPG is liquefied petroleum gas – propane.
Further to elaborate the differences:

LPG has a higher energy content than CNG, with 25MJ/L versus 9MJ/L, respectively.

  • Storage pressure of LPG is less than 2 MPa whilst CNG is 20 – 25 MPa.
  • For proper combustion, LPG requires an air to gas ratio of approximately 25:1 whilst natural gas requires a 10:1 ratio.
  • LPG and natural gas appliances operate at different pressures – 2.75 kPa vs 1.1 kPa, correspondingly.
  • LPG (propane) is denser than air at a relative density of 1.5219:1 vs natural gas (methane) at 0.5537:1, which is lighter than air.
  • CNG cylinders have a tare weight approximately 3x heavier than comparable capacity LPG cylinders.
  • LPG can be compressed into a liquid, increasing its energy density.
  • LPG (propane) and natural gas (methane) have different chemical formulas: Methane is CH4. Propane is C3H8.
  • For proper combustion, LPG requires an air to gas ratio of approximately 25:1 whilst natural gas requires a 10:1 ratio.

Difference between CNG and LPG Cars :-
The difference between CNG and LPG cars is primarily just the fuel. Petrol and diesel vehicle owners contemplating conversion to CNG and LPG should also be aware of the differences.


Both LPG and CNG are much cleaner fuels than petrol or dies.They both have fuel systems are sealed.This avoids any leakage or evaporative losses.They both also have lower maintenance costs, including greatly reduced fouling of the spark plugs.

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