Good performance smaller gears equals better acceleration but it will get you some time getting used to them very different than cultus and khyber.... but very organized and nice engine with a great sound when you press he accelrator....
with the AC on the car looses a lot of its acceleraion i suggest you not to go high on the revs with the AC on....
I don't knw about CNG consumption since mine was on petrol only....
The interior is very nice, spacious feels like a big car from the inside as compared to the cuore...
The road grip will get better juzz get good tyres... The steering is very responsive and has a great feel to it plus it has an excellent turning radius...
Thats all my experience suggest you to arrange a test drive so that you can believe me easily
Cheerss~~~