Can't seem to find a published number for Cd on the speed 6. As I recall, it's ~0.32 for the MSP, which is good, but not great. I would've thought the 6 wouldn't be worse. Also, it looks like they are quoting the frontal projected area as 2.15 sq. meters (~23 sq. ft.) ... seems too high ... data seems suspect.
0.384 for an STI seems too high as well. I believe trucks and SUVs to be around that number.