Hi D50freak:
Yeah, this review is a bit old, so I can't even recall my thoughts on that camera. It's been superseded by other models since, as well, so things are ever-improving. Generally, lesser-expensive D-SLRs aren't usually going to have the richest colors available, and the D50 (and even my D80) are no exception. It comes with the territory of cheaper sensors.
In that image though, I'd have to agree with Kougar... the car doesn't look pure black at all, but I'm doubting it is in person either. To me, it looks more like a graphite gray. Also, the blur to the side of the photo suggests that the shutter speed was slowed-down for this shot, and it probably shouldn't have been. There's no need for that on a bright day unless you were going for a certain effect, but again, I'm doubting you were.