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LPG = Liquified petroleum gas = propane (or butane?). CNG = compressed natural gas = methane.

LPG tanks are much more straightforward, 100-200psi (and standardized) than CNG (thousands of psi to usable amounts in the tank because it stays as a gas unless you chill it to like -100C).

NG is a lot cheaper, in theory. In theory, you could refuel at home.

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Ahh interesting. Didn't realise there were such significant differences in storage. Thanks!

For extra fun, CNG and LPG vehicles both exist in North America. Not too common, but they're both out there, usually in fleet operations.

LPG is used for BBQs and some heating, so more widely available, but hard to find cars that use it.

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