A comparison between the McDonnell Douglas F‑4 Phantom II and the Lockheed Martin F‑35A Lightning II highlights the stark technological gap between Cold War–era fighters and modern fifth-generation aircraft.
The F-4E Phantom II, which first flew in 1961, remains part of Iran’s air fleet decades after its introduction. Through upgrades and reverse engineering, Tehran has kept an estimated 60 of the aircraft operational. Despite these efforts, the platform still reflects older combat design concepts and lacks many of the advanced capabilities found in newer fighters.
By contrast, the F-35A Lightning II incorporates stealth shaping, advanced sensors, and integrated avionics designed for modern network-centric warfare. A key component is the AN/APG‑81 Active Electronically Scanned Array radar, which can detect and track multiple airborne targets at ranges exceeding 150 nautical miles. In a reported encounter, the F-35 detected a formation of Iranian F-4 aircraft from roughly 140 nautical miles away. Operating in a low-probability-of-intercept radar mode, the stealth fighter tracked the jets while remaining electronically concealed and maneuvered into position before the Iranian pilots were aware of its presence.
