LPG vs CNG: Key Differences, Pros & Costs Explained
LPG is liquefied petroleum gas (propane-butane mix), stored as liquid under pressure. CNG is compressed natural gas (methane), kept as high-pressure gas.
Fleet managers and car owners often hear “gas conversion” and assume it’s the same upgrade. In reality, one tank hides in your spare-wheel well, the other needs a bulky cylinder that steals trunk space—hence the mix-up.
Key Differences
LPG packs more energy per litre, giving longer range for taxis and forklifts. CNG burns cleaner but needs stronger, heavier tanks. LPG stations are common in cities; CNG pumps cluster along highways for trucks. Home LPG arrives in cylinders; CNG arrives via pipeline.
Which One Should You Choose?
City commuter with a hatchback? LPG retrofit (~$1,200) is cheaper and fits small cars. Long-haul fleet chasing carbon credits? CNG systems (~$2,500) slash CO₂ and get bulk fuel contracts. Check local pump density first—no fuel, no savings.
Is CNG safer in crashes?
CNG tanks are thick-walled and release gas upward, reducing fire risk, but any pressurized fuel demands certified installation.
Can my petrol car switch to LPG?
Most four-cylinder engines accept bolt-on LPG kits; check if your model’s ECU supports dual-fuel mapping.
Which fuel costs less per km?
CNG usually wins on price per energy unit, yet LPG’s wider station network can erase the gap in remote areas.