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Petrol vs. LPG: What's the Difference?

Edited by Harlon Moss || By Janet White || Published on January 16, 2024
Petrol, a liquid fuel used mainly in internal combustion engines, is derived from crude oil; LPG (Liquefied Petroleum Gas) is a gas at room temperature, used as fuel in heating appliances and vehicles.

Key Differences

Petrol, a liquid obtained from refining crude oil, is primarily used as fuel in cars and motorcycles. LPG, a mixture of propane and butane, is a gas that turns to liquid under pressure and is used in heating, cooking, and as automotive fuel.
Petrol engines work by igniting the fuel-air mixture with a spark plug, powering various types of vehicles. LPG, being a gas, requires a sealed system and is often used in specialized engines designed for its properties.
The distribution of petrol requires a vast network of pipelines, tankers, and filling stations. LPG, however, is typically transported in pressurized tanks and is more easily stored in both liquid and gas forms.
Petrol has a higher energy density compared to LPG, making it more efficient for use in vehicles. LPG is known for its lower emissions and is considered more environmentally friendly than petrol.
Petrol's price and availability can be subject to global oil market fluctuations. LPG, while also affected by market changes, can be a cheaper alternative depending on regional availability and taxes.

Comparison Chart

State at Room Temperature


Primary Use

Fuel for vehicles
Fuel for heating, cooking, and vehicles

Energy Density


Environmental Impact

Higher emissions
Lower emissions

Distribution Network

Pipelines, tankers, filling stations
Pressurized tanks, smaller distribution network

Petrol and LPG Definitions


A refined oil product for transport and machines.
Petrol's efficiency makes it popular despite its environmental impact.


A gas used as fuel, stored under pressure.
Many households use LPG for cooking.


Derived from crude oil, used in automobiles.
The rise in petrol prices affects transportation costs.


Used in specialized engines and appliances.
Converting a car to LPG can reduce fuel costs.


A liquid fuel for internal combustion engines.
My car runs smoothly on unleaded petrol.


Burns cleaner than many other fuels.
LPG is favored for its lower emission profile.


A volatile liquid powering most conventional cars.
Petrol stations are common along highways.


Composed of propane and butane, turns liquid under pressure.
LPG is a versatile fuel, used both in homes and vehicles.


Used in engines for combustion with air.
Ensure your vehicle is compatible with the type of petrol you use.


An alternative to natural gas for heating.
LPG heaters are popular in areas without natural gas supply.




Petroleum, a fluid consisting of a mixture of refined petroleum hydrocarbons, primarily consisting of octane, commonly used as a motor fuel.


(informal) A motor vehicle powered by petrol (as opposed to diesel).




A volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines


Can LPG be used in regular petrol engines?

Not without modifications; LPG requires specialized systems.

What is the main use of petrol?

As fuel for internal combustion engines in vehicles.

What does LPG stand for?

Liquefied Petroleum Gas.

Are LPG tanks safe for home use?

Yes, when installed and maintained properly, they are safe.

Is petrol more expensive than LPG?

Often, yes, but prices vary by region and market conditions.

Is LPG environmentally friendly?

It has lower emissions compared to petrol and diesel.

How is petrol stored and distributed?

Through pipelines, tankers, and at filling stations.

Does petrol produce more emissions than LPG?

Yes, petrol engines generally emit more pollutants.

Is petrol more efficient than LPG?

Yes, petrol has a higher energy density.

What is petrol?

A liquid fuel derived from crude oil, used in vehicles.

Can LPG be used in all climates?

Yes, it functions well in a variety of climates.

What affects petrol prices?

Global oil prices, taxes, and supply-demand factors.

How often do petrol prices change?

They can fluctuate frequently based on market conditions.

How long do LPG tanks last?

Depending on usage, residential tanks can last several weeks.

Can LPG be used for cooking?

Yes, it's widely used in residential and commercial kitchens.

What are the benefits of using LPG?

Lower emissions and potentially lower costs.

Can LPG be used in cars?

Yes, in cars specially equipped for LPG use.

Is petrol renewable?

No, it's a non-renewable fossil fuel.

How is LPG stored at home?

In pressurized cylinders or tanks.

Is LPG a good alternative to diesel?

Yes, especially considering its lower emissions.
About Author
Written by
Janet White
Janet White has been an esteemed writer and blogger for Difference Wiki. Holding a Master's degree in Science and Medical Journalism from the prestigious Boston University, she has consistently demonstrated her expertise and passion for her field. When she's not immersed in her work, Janet relishes her time exercising, delving into a good book, and cherishing moments with friends and family.
Edited by
Harlon Moss
Harlon is a seasoned quality moderator and accomplished content writer for Difference Wiki. An alumnus of the prestigious University of California, he earned his degree in Computer Science. Leveraging his academic background, Harlon brings a meticulous and informed perspective to his work, ensuring content accuracy and excellence.

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