Watch that front fender. It almost looks as though it couldn't accomodate that front wheel moving under there.
I'd also be a little more critical of the fabric in the figure. The drapery on the guy looks forced. For as much detail is on the vehicle, the figure seems to fall a little flat in comparison and almost looks cartoonish.
I'd also look at the red shape you've got in the background. I want to follow the right side of it down to encapsulate the vehicle. It seems to flow awkwardly into the back of the vehicle's "ladder" (?).
Thanks for the comments. In regards to the front fender i did alter this on following versions as it is a little tight under there lol. Also i agree with the red background and will change it accordingly. The figures in the picture are only there to serve as props hence why they are not detailed etc, (hope u understand) the main focus is the vehicle. The comment regarding the drawing is off and i don't know what I draw is ridiculous. if you don't like something fine but be specific. This is just a none comment which makes out that there is nothing positive what so ever. I checked out your work and I think you should take some of your own advice before commenting. Thanks once agian for the constructive comments.