A car with relatively low fuel efficiency WordNet 3.0 & Open English WordNet

The term gas-guzzler, part of our vernacular to mean a car with burns copious and excessive amounts of fuel, came into formal legal usage in the U.S. when Congress established Gas Guzzler Tax provisions in the Energy Tax Act of 1978 to discourage the production and purchase of fuel-inefficient vehicles. Wikipedia

vehicle that consumes fuel inefficiently Wikidata

A vehicle that needs a lot of fuel. OmegaWiki

A vehicle that consumes a large amount of fuel. Wiktionary

Vehicle that consumes a large amount of fuel. Wiktionary (translation)