Some relatively good shots there, as mentioned, the portrait shot could be a very good one if it was a landscape shot instead.
The photos seem to be very soft, although this could be due to compression and hosting.
The second could also benifit from a slightly lower point of view, getting that bit closer to the ground can give the impression the car is much lower than what it actually is (Although, i have seen the car, and i certainly wouldnt call it 4WD height
)
In the first one, try shooting on the same side of the car that the light source is coming from too, the results can be hugely different! Just be aware of your shadow, its easier to move a little bit than to crop or clone out a shadow on the computer, and it saves a lot of time.
As Big V mentioned..... If you want to organise a meet, im sure there would be a few people keen to come along