Emergency services were called out to Tuffley in the early hours of Saturday (May 31) after reports of a blazing car.
Fire crews arrived at Greenhill Drive, near Bodium Avenue shortly before 2am and found a Vauxhall Tigra well alight.
One fire appliance from Gloucester South community fire station attended the scene with a crew of five fire fighters.
The owner of the car is understood to be from outside of Gloucestershire. It is being treated as arson by police.
Police are investigating. No one has been arrested.