So i have been fucking around with my Nikon p90, it ain't an DSLR but it gets the job done. i got into car photography a month ago, let me know what you guys think. haters are welcome. keep in mind that i just started this, aint a pro.
Simplest step - don't cut/crop the car in unnatural ways.
Cut down on the editing... ridiculous vignetting doesn't flatter underexposed photos. I would recommend actually looking into the basic fundamentals of photography before picking up the camera and going shooting. Great if you're having fun, but in the mean time look into what it takes to improve and you'll see much better results and a solid foundation of what to practice off.