chinti, I got my city e specs 2 months ago in Nov last year similar to yours. I saw your post of noises and brought to SC but couldn't identify the problem. For your info, my car seems fine without any noise even when driving around 30 to 40km/h. Maybe just the louder sound when you rev the engine in some cases, but other than that, no other specific sound are spotted.

Yes exactly only engine sound.
I saw some members posting about other noises and throughout the 2 months I tried hard to listen to these noises but somehow I dont face these issues in my car.
Only engine sound and braking sound