Hi Gina - I don't think you could have done better on sharpness and DOF. This is a powerful image. Without including any obvious label saying "Jaguar", you've let us know that we're looking at a Jag! The ONLY thing I would like to see is a slight (very slight) toning down of the brightness on the left so that the bumper isn't quite so wiped out. That pulls my eye away from the rest. In composition, you've done a good job of having triangular points in the picture. This leads the eye from one to the other to the third point and back again --- keeping the viewer's interest and attention within the photo. The "Meeow" is also a cute touch giving a little lightheartedness to the image.
Oh, and I would say that you definately met the challenge. Great representation of "Transportation" (pretty classy transportation, too!)
I like this shot because of the light "stars" and the angle and crop you decided upon. I would have cut out the license plate, but I can see why you probably kept it in-- to make the title totally obvious! My only quibble is thew wicked bad shadow on there.. is that your shadow? ;)
Love the pristine condition of the car, the glint of sun on the bumper, and the 'registration plate' - pity about the shadow across the MEEOW ... a dealer's car yard I presume?!