the entity name is prop_vehicle_sin, but you can't just spawn an entity by typing it's name!
i cannot place a weapon in front of me by typing weapon_assault_rifle. to get a weapon i would need to type "Give [weapon_entity_name]", However, do NOT do this with the car. it would spawn inside of you.
There is a specific command, i just can't remember right now, and i feel pretty stupid 'bout posting this soo late