Thanks for all the suggestions,
How is the road condition of the route via Bombay, especially considering the monsoon?
We would prioritize it to high to visit Agra..You know the reasons.

, So what will be the deviation to Agra when taking the route via Bomabay?
For an update on our plan, we won't be taking the car back with us. The car belongs to my friend, who just got relocated to Chandigarh.
After the trip to Shimla, the car will be given back to him and catch the flight back to TVM.
Is space such a constraint for three in a Santro for 6 -8 days?