LPG Kit Fitting: Is It the Right Alternative Fuel for Your Vehicle?

How an LPG Kit Works

An LPG (Liquefied Petroleum Gas) kit works on a similar principle to a CNG kit: it lets your petrol vehicle run on gas, with a switch to choose between fuels. The main difference is how the fuel is stored. LPG is stored as a liquid under relatively moderate pressure, while CNG is stored as a compressed gas at much higher pressure.

In an LPG system, the liquid fuel travels from the tank to a vaporiser/reducer, where it is converted to gas and fed to the engine through injectors controlled by a dedicated ECU — much like a sequential CNG kit.

LPG vs CNG: Key Differences

Both fuels can lower running costs compared to petrol, but they suit different situations. The right choice often depends on your vehicle and on which fuel you can conveniently refill where you drive.

• Refuelling: availability of auto LPG and CNG stations differs by area — check what is convenient on your regular routes
• Storage: LPG tanks operate at lower pressure than CNG cylinders and are available in different shapes
• Range: LPG generally stores more energy in the same space as a liquid, which can mean more range per fill
• Running cost: depends on current local prices of each fuel and your vehicle's mileage on it

When LPG Makes Sense

LPG can be a practical choice if auto LPG refuelling is convenient for you, if you want more gas range from the space available, or if your vehicle is better suited to an LPG setup. As with CNG, vehicles that cover higher daily distances generally recover the conversion cost faster. Our team can assess your vehicle and help you compare LPG and CNG honestly for your usage.

Tank and Boot Space Considerations

LPG tanks come in cylindrical and toroidal (doughnut-shaped) designs. A toroidal tank can often fit in the spare wheel well, which may leave more usable boot space than a cylindrical tank — though the options available depend on your vehicle. Discuss how you use your boot with the technician before choosing a tank size and shape.

Maintenance and Documentation

An LPG kit needs regular care just like a CNG kit — periodic servicing, filter changes, tuning checks and leak inspections. If you ever smell gas, stop using LPG, switch to petrol if safe, and bring the vehicle to a workshop promptly.

After an LPG conversion, your RC generally needs to be updated to reflect the additional fuel type, and your insurer should be informed. Requirements and approved kit rules can vary, so please confirm current requirements with your local RTO.