The car hit the divider and caught fire at Peddamberpet in Hayatnagar in Ranga Reddy district.
Police quoted witnesses as saying that the car lost control apparently due to speeding. Flames engulfed the vehicle in no time and its occupants were burnt to death before any rescue effort could be mounted.
The deceased were identified as Shivakrishna, Shashidhar, Raju and Srikant, all aged between 25 and 30 years and residents of Warangal district.
They were returning after dropping a friend at the Rajiv Gandhi International Airport here around 6 a.m