Earlier quoted context omitted.
Compressed propane is explosive, more so than liquid gasoline or batteries. Though batteries do burn hot and are hard to extinguish.
Actually it's considerably less explosive than petrol and far safer in a crash. If a petrol-fuelled car goes on fire, the fuel tank will explode. The tanks are usually thin plastic and will split open in an accident, spilling fuel everywhere. By contrast, the LPG tanks are pretty much indestructible and if you remove a tank from a car that's been on fire (a lot of taxis are LPG-powered and seem to go on fire late at…
As I understand it, gasoline tanks on cars are unlikely to explode unless they are nearly empty.