wish I had a way to test the various options remotely. The whole point of the design activity is that you're learning how engineers are always experiencing tradeoffs, so there's no way to "specialize in everything". That said, I'm sure there's some combination which may result in a slightly higher overall score. Unfortunately it really doesn't seem to matter in any real way on the ride (other than the little scoreboards).
I think my highest was 211... but, I don't really pay attention to my score, I just focus on making my car pretty. Once, though, I made a vehicle that was perfectly even in all 4 tests, but got around 190, which confused me.