SR-71 Blackbird vs MiG-25 Foxbat | INCREDIBLE ENGINE DifferencesTwo machines pushed to the edge of physics. Speed. Heat. Precision. And the promise of Mach 3 flight. The American SR-71 Blackbird and the Soviet MiG-25 Foxbat were born from the same fear…the need to control the skies. One relied on unprecedented efficiency. The other, on raw power…and both depended entirely on their engines to survive the instability of moving faster than a bullet. —