86 Jeep Cherokee - 75mph (i think that was its max speed)
95 Subaru Impreza - 105mph (started shaking pretty badly)
98 Subaru Forester - 95mph (aerodynamics of a brick)
00 Pontiac Trans Am - 145mph (with room to spare)
04 Jeep Grand Cherokee - 110mph (my bro's 4.7L V8 - hit the limiter)
05 Crossfire SRT-6 - 156mph (hit the limiter)

The TA and SRT-6 runs were both closed roads. I'm not really crazy enough to try that out in the wild.