The victims were returning from a wedding when the accident occurred in Khandela area late last night, police said.
Laxmikant, Kanaram (both aged 26 years), Akash (22) and one unidentified youth died on the spot whereas Mukesh is being treated at a hospital, police said.
The car was in a high speed and the driver could not see the pillar and the mishap occurred, they added.