If the car is just sitting there, and you have a DSLR, then change the ISO low. You will get a crisper image. Also, you can adjust the aperture to let in more light. Finally, the shutter speed should be slow if the car is just sitting there. Those three things will let you allow the light you are seeing to really soak into the camera to get a nice, detailed shot. If you set the shutter speed to very long, however, you might want to use a tripod. The clearest shots are ones that most people would never be able to hold the camera still enough to take- they have to be taken with a tripod.
Bear in mind that if it’s night time (or any situation where you have less light) you want to open the aperture larger and allow the light to soak longer because there’s less of it.
If you don’t feel like messing with all these settings, just take several shots in each mode on the camera: landscape, portrait, etc.