Priya Shukla, a class 12 student, was in the car with three friends around midnight when the accident took place in north Delhi's Sarai Rohilla. She was killed on the spot. Dev, whose birthday was celebrated, is critically wounded and is in hospital.
It is not clear yet who was driving. Two others in the car ran away, the police say.
The police say the car was being driven at a high speed when it hit a tempo and a Hyundai i-10 car.
The police are looking for Priya Shukla's missing friends. They are also investigating whether the driver was drunk.
Get the latest election news, live updates and election schedule for Lok Sabha Elections 2019 on ndtv.com/elections. Like us on Facebook or follow us on Twitter and Instagram for updates from each of the 543 parliamentary seats for the 2019 Indian general elections.