The condition of all the four injured is reported to be critical.
The collision was so severe that the Indigo car went up in the air and fell several metres away.
Three males and two women from Delhi's Malviya Nagar were inside the Indigo car, while the BMW car owner's son Dakshesh Jaiswal and his driver were inside their vehicle.
Dakshesh is a B.Com. student. The Indigo driver Sanjay Gulati and a woman Saman Chopra were killed on the spot, Maheshwar Dayal, DCP Gurgaon East, said.
The condition of Dakshesh Jaiswal is serious and he is not in a position to give his statement to police. Rajendra Chopra, Meena and Sanjay were inside the Indigo car.