I am using Wagon R CNG model from last 20 months. I must say its a very good car for small family also fuel efficient. I get around 23 KMPL average on CNG. You can easily get 260 KM on full CNG tank of 9 KG Though it depends on driving condition. The disadvantage of CNG is you wont get luggage space. You can use external carrier for luggage, its an accessory. Rest all things are good, mileage, pickup, city drive, highway drive is excellent.
