This was a cinch to fix up. First of all, don't listen to everyone else--the perspective is JUST FINE the way it is.
1) To make a better looking sky, simply render some clouds up there. It's very realistic. Also, don't forget to smudge to get rid of those nasty edges!
2) Add a sexy bikini model! What picture of any bitchin' car is complete without a sexy woman standing behind it doing sexy things! OW! Sizzlin'!
3) Since you know that cars can and often do move, you can realistically recreate this movement with a simple motion blur. Make sure you turn it up high so you know the car is really haulin' ass!
4) Most importantly, to make a chop look more realistic and like an "actual photograph" simply add a lens flare. Only REAL photos have lens flares, so this can really trick the viewer into thinking, "Hey! This must be a real photo! Just look at that lens flare!" My policy on this, is the more lens flares the better. Every time you add a lens flare, the photo becomes that much more realistic.
5) Add some text that expresses the basic idea of what the picture is about. I added "Sweet Ride" because that seems to be the theme of the photo. You can be creative with this... off the top of my head, "Bitchin' Ride", "Awesome Ride", and "Car." would all work very well with the theme of the photo.
I hope this helped! With just a few simple steps, you're on your way to having a photo-realistic, and totally sweet picture of a yellow car.