Q. I had driven the Maruti Suzuki Wagon R CNG and ZXI petrol, both didn't seem to be as peppy as the Celerio. Also is the body roll factor really a cause for worry on highways and roundabouts?

Celerio is a way different from Wagon R though both shares same engine. I drove Wagon R on the highway as well as in rural areas and in mountains. If driven carefully body roll factor is not a matter of concern.

I don't think so i have driven 2500 km long journey but what i faced is vibaration of stering when reaches 100 km/h.. dats it no other problem i have faced very good car

In my opinion yes cng fits well on celerio. on low rpm too its fun.Wagon R petrol perform much better than its cng.Body roll is still there for the wagon r.