I have the old PS2 version of Test Drive Le Mans as well as the even older Dreamcast version, the only real difference being that the PS2 version had more recent cars availabe. It was a good game, especially since it did go through changing weather and realistic dusk and dawn. The only problems I had with it were that if you set the weather to variable, it didn't tell you what the weather was at the start, and it was a bit too easy. You shouldn't be able to win overall in a Corvette.
Now I just use Gran Turismo since the track is more up to date.