The price of natural gas was claimed to be lower and more stable than that of LPG and would not exceed 5 RMB/m 3 (€0.43/m 3). This is probably the result of the deal between China and Australia for the annual import of 3.7 million tons of LNG with a pricing mechanism that will ensure that the price is much lower than the current price for PNG stands for Piped Natural Gas LPG stands for Liquified Petrolium Gas CNG stands for Compressed Natural Gas. Was this answer helpful? 9. Similar Questions. Q1. Differences between LPG and LNG. LPG consists mainly of propane and butane whereas LNG consists mainly of methane. LPG has a much higher heating value than LNG, and therefore it is also used to power cars and even buses. LPG is liquefied by increasing its pressure whereas LNG is liquefied by lowering its temperature. The main difference between natural gas and liquefied petroleum gas (LPG) is the way they are supplied to customers. LPG is mostly made up of propane and as a by-product of fossil fuels – typically natural gas and crude oil – it’s extracted from fossil fuels through a refining process that makes it a denser gas. The Clean Cities Alternative Fuel Price Report provides regional alternative and conventional fuel prices for biodiesel, compressed natural gas, ethanol, hydrogen, propane, gasoline, and diesel. The Alternative Fuel Price Report is a snapshot in time of retail fuel prices. Alternative fuel fleets can obtain significantly lower fuel prices than Propane contains 2,516 BTU per cubic foot while natural gas only has 1,030 BTU per cubic foot. You can see that propane has over twice the amount of energy content than natural gas of equal volume. Switch to Clean Energy. If we compare propane vs natural gas and other fuels, propane is the more eco-friendly option. OhhnM.