Brother either you should record your car in the guinese books of world record or you are not calculating the consumption right or you have 70KG CNG cylinder.
Even M/T Civic does not give that kind of average or people will sell their cultus and buy civics.
It gives max 120KM in city if you drive @50KM/hr not more than that.
If you drive with A/C or at high speeds it gives 80-100 KM for M/T and PRosamtec.
Its a gas guzzler that is why these cars have no resale.