Liquefied Petroleum Gas (LPG)

An alternative fuel that may be used on its own, or in conjunction with petrol in bi-fuel cars. The LPG is housed in a separate tank and the driver can switch between the two sets of injectors (one for LPG, one for petrol) using a dash-mounted switch. Although LPG does not offer as good a fuel economy as petrol or diesel, it is much cheaper and pollutes less. LPG vehicles are also exempt from London's congestion charge.

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