Question: what is the difference between auto lpg and cng?
Answer: CNG is Compressed Natural Gas, which is mainly methane compressed at a pressure of 200 to 248 bars. LPG is Liquefied Petroleum Gas, a mixture of propane and butane liquefied at 15 °C and a pressure of 1.7 - 7.5 bar. ... CNG is cheaper and cleaner, but LPG has a higher calorific value.