Parameters	CNG	LPG
Emissions	Average 70% lesser than petrol / diesel	Average 90% lesser than petrol / diesel
Power	Reduces by about 20% as gas carburetors are often used	Same as petrol / diesel vehicles
Volume of Fuel tank	Large tanks avg. 6 times that of petrol / diesel for same mileage: additional weight and eats up boot space	One third that of CNG
Filling time	Many times compared to petrol / diesel depending on quality of compressor	Same as petrol / diesel
Conversion cost	Taxi / car: PKR 25,000	Taxi / Car: PKR 6,000 – 14,000
Safety	High pressure can be a safety concern	5-7 bar, comparable to conventional fuel.
Handling	Requires special equipment	Ease in handling as close to liquid fuels
Dispensing	Requires special equipment. A compressor alone costs PKR 20 million and a complete station could cost up to PKR 30 million	Average LPG stations cost PKR 3.5 million only.
Transportation	Dependent on pipeline networks	Easily transported by road tankers like liquid fuels.
Distribution	Dependent on pipeline networks	Supplies delivered by road tankers liquid fuels.
Network Establishment	Longer lead time due to pipeline laying	Easy to develop, lead time of hardly three months for each facility
Initial investment in infrastructure	Average USD 250,000 and upwards for just a dispensing station with compressor of suitable capacity	Average USD 65,000
Global experience	4,600,000 vehicles	Over 9 million – 2 times more vehicles on road in cities across the world.