Street some get nice pics on purpose, like Venom (he is just about an expert with putting his car in a pretty picture), but others might just be lucky and get a good shot. Try maybe taking some pictures on a clear day when the sun has gone down (to avoid the glare into the camera as well as the car looking different colours). Then next step is to find some nice scenary, anything will do from factories in the background to a nice tree. Last thing i can propose is to be creative with your camera. It doesnt haveto stay horizontal, try different angles. Lying on the ground or find and elevated posi to take a nice aerial shot. Also turning the front wheels and getting a front angle shot can make the car look super
practise makes perfect i guess. Snap alot of pics and see what works for you.