In my opinion, I don't think you've balanced colour enough, as in the background just looks so warm it's intensely distracting. #3 irritates me that it's cut off, otherwise i'd say it's the best of the bunch. The last one, similarly, just doesn't do it for me. I wish there was a bit more light on the side panels and wheels, if so i'd be heaps keen on it. I presume the last on is light painted? If so I reckon it would've been better served with just a couple of pops into the wheels.
Otherwise nice shots, but yeah, perhaps just mute out some of the warmness in the background? Warm colour steals my eyes.

