I agree with the weeds behind the car causing some distraction. Also the picture seems a little off center to the right due to the crop. It does seem like an interesting subject though. Maybe a dawn / dusk shot would make it a little more dramatic.
I like the subject, but I think there is a little too much detail in the background and it takes away from the cars. Getting closer or using a shallower DOF might make them stand out better. Or, crop out most of what is above the fence to emphasize the cars and weeds. Maybe play with dodge and burn to make them stand out more, too.
Ok...I like the subject matter here. You would have done much better shooting at a different time of day (early morning or late afternoon/evening) to get much better lighting. The light here is a little harsh to me. A much shorter DOF would have given more weight to the cars and given you a more diffused background and foreground. A different perspective would have really helped on this one. (There is the issue of the big "hump" in the way from where this was shot.) Had you been able to pull the clump of weeds away and gotten lower, this would have been much more interesting. Because the colors are not really dynamic, there needs to be something else to draw the viewer in, and unfortunately, there is a lot going on in this shot. :) (I'm no expert!)
I think it was the dead center horizontal composition that made me score this low. Also the trees, buildings and fence in the background distracted me - their color and texture was more interesting. (I gave it a 5)
A nice subject which, like the previous commenter said, could perhaps do with a more imaginative composition that captures some of the key aspects you're trying to convey.
Sorry if this comes across as harsh, but there isnt a lot in this photo that draws me. I think it could benefit from a different perspective, or composition.