For this, we would suggest you walk into the nearest dealership as they will be the better person to assist you. You can click on the following link to see the details of the nearest dealership and selecting your city accordingly. Follow the link for dealership details - Car Showrooms.
For this, we would suggest getting in touch with the dealers of Lamborghini in Delhi as they would be able to assist you better on this. Follow the link to get the dealers of Lamborghini in Delhi. Dealer.
The Lamborghini Aventador is priced from Rs.5.01 - 6.25 Cr (Ex-showroom Price, New Delhi). You may click on the given link and select your desired city for an estimated on-road price.