Even my votes are for CNG since you are in Delhi. But do not know the availability of CNG in Delhi.
In Chennai or for that matter in TN availability of LPG stations are very less. If you planning for long travel you should plan accordingly and know the list of LPG fuel stations on the way.
I had traveled to Tuticorin in march nearly 1200 KMs on both-ways and I took the list of LPG stations and managed the entire stretch [both up and down] in LPG without any problem. Luckily I had a LPG station close to my sisters house [where i stayed] so I managed with it for local trips also.
But one can not expect such kind of comfortableness in all routes.
In Chennai or for that matter in TN availability of LPG stations are very less. If you planning for long travel you should plan accordingly and know the list of LPG fuel stations on the way.
I had traveled to Tuticorin in march nearly 1200 KMs on both-ways and I took the list of LPG stations and managed the entire stretch [both up and down] in LPG without any problem. Luckily I had a LPG station close to my sisters house [where i stayed] so I managed with it for local trips also.
But one can not expect such kind of comfortableness in all routes.