CNG1 Gas-powered cars: CNG is not LPG What are the advantages of gas-powered vehicles?Both CNG and LPG powertrain systems are cheaper and more eco-friendly in cars than diesel or gasoline systems. Their combustion is comparably cleaner, reducing emissions of particulates and nitrogen oxides. Both fuels are also cheaper than gasoline or diesel. Thanks to low production costs and tax incentives, compressed natural gas (CNG) costs driv.. 2014. 7. 29. 이전 1 다음