Slightly better than the last one I suppose.
Again with the things that you didn't make. You could have very well made the tire rims and the fire yourself. The two signs look like they would be extremely easy to make even in a program such as paint so I would suggest doing that as well. Making it completely original helps out, but with this piece I don't know how much it would.
The first thing that sticks out to me is the thickness of the lines used. It's much better to use a thin line when drawing almost anything. The second thing that I notice is the red light coming out of the back and front. Neither should have an outline to them especially since light isn't a solid object and doesn't have a physical presence.
Again with the white space as well. I suggest coloring in all of your white space. This can easily be done with almost any program. If you're using photoshop it should be an easy task, but it's an even easier task if you do it in paint. If you would have filled all the white space then I would have given you at least one point on this submission.
I personally feel that the green of the "fin" on the back of the car was very out of place. The green doesn't really match with the black and red of the car. However, the green on the bottom of the car was decent. It would have been better if you made the lights of the car transparent such as this.
Making the dragon detailed would have increase the points that you got on this submission a lot. A detailed dragon with a car that had the filled in space, along with all original work from yourself would have earned you at least a 3-5 from me.
The tires are really poor. Neither of them are round at all. Since you did this by hand I suggest taking something like a small shot glass or another small circle to make round tires. It's virtually impossible to make a perfect circle without tools, but I almost think that a few seconds worth of effort could make something pretty close.
Give this thing a background of some sort. Put it out on the street at night time. of course, it would obviously match in with the background if you did that at night so you need to give some shine to the car. have reflections, make it 3-D, give it much more detail. I personally think that is way out of your talent range as of now, but with a bit of practice you should be able to work your way up to it.
Overall, needs to be more detailed, use thinner lines, try semi-transparent colors, add a background, color within the lines and fill the white space, and give much more effort. Practice, practice, practice.