From https://en.wikipedia.org/wiki/Compressed_air_car#Disadvantages https://en.wikipedia.org/wiki/Compressed_air_car#Disadvantag... - A 2005 study demonstrated

From https://en.wikipedia.org/wiki/Compressed_air_car#Disadvantages https://en.wikipedia.org/wiki/Compressed_air_car#Disadvantag... - A 2005 study demonstrated that cars running on lithium-ion batteries out-perform both compressed air and fuel cell vehicles more than threefold at the same speeds. - A 2009 University of Berkeley Research Letter found that "Even under highly optimistic assumptions the compressed-air car is significantly less efficient than a battery electric vehicle and produces more greenhouse gas emissions than a conventional gas-powered car with a coal intensive power mix."