Quote:
Originally Posted by euromodder
The big thing CNG has going for it, is that you can replace it with biogas from waste and synthetic gas made from other sources (like Audi's syn-gas plant using windmills to make NG from CO2 and water)
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And let's suppose a dedicated-CNG engine with direct injection appears, it would not require the GPF nowadays fitted to some gasoline-powered engines which resort to direct injection too. But anyway, CNG still makes more sense with port-injection.