One thing that stands out to me on the reverse view - other than the Roger Rabbit tire, of course - is the shame of the roof as you move toward the front. The front view seems to suggest the slope comes down to be almost parallel with the ground, while the reverse view suggests it points up like 20 degrees. I don't know which is ground truth for this model car, but I suspect it comes close to parallel with the ground.
I can see where it looks like you made changes to the front height of the drivers side window. It's possible you went a millimetre too high or so there.
But that's just nitpicking. Again, it's a really great sketch.
Yeah, I know, but I didn't want to disimprove it so yeah. Gotta say, even with a grid it's very hard to pinpoint the cut off points or angles exactly, but I'm pretty confident that I'll get better at setting them the more I end up drawing cars.