Supra Cd= 0.32Just as a reference, a 1300whp supra couldn't do 200mph in the half mile event. He got to 197.
Solstice Cd= 0.45
Which means that the Solstice has a huge disadvantage - 130 counts or 40% worse aerodynamically. Which means that if a 1300 whp Supra couldn't do it, the Solstice hasn't a chance.
If you want a closer calculation, the frontal area of the Solstice is about 21.4 sq.ft. so the CdA (best way to compare cars as one might have a lower Cd but a higher frontal area) is 9.63
Supra is 6.44.
If anyone is interested the old Fiero was 6.75, not bad but not as good as the Supra (the Fiero also tended to get light in the front at high speeds, which is another consideration if you actually want to try an attain top speed).
Best you get on the street tends to be something like the Acura NSX at 6.13 for modern performance cars. Little cars can sneak into the 5 range - Honda CRX etc. because they have low frontal areas.
Here's a handy list I came across if you are interested:
Vehicle Coefficient of Drag List - EcoModder