Suzuki Liana RXi CNG or Petrol?

[freakridemaniac]

hi guyz
uptil now i hav posted a lot of topics in just 2 days ....!!!
well what i wanna know now is
Iz Liana RXi CNG more economic or Petrol ??
plz compare it will Honda City and tell which one iz more economic ???
The Petrol or the CNG version ??

[fzaman]

@freakridemaniac
Congratulations on your new car.... do tell us about the average on petrol..