7 seater SUV, daily drive, light offroading with capping of 1 m Rs., really tough question, try to find some pajero 2.8l diesel a decent one will be around 1.1-1.2m. Dont go for 2.5l 5dr as its underpower.
Thumb rule, if you want petrol no 7 seater SUV should be less than 3.4~3.5l, for diesel it should not be less than 2.8l.
This is the minimum capacity to run a seven 7 SUV fully loaded with huge air resistance at 120km/h.