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Su-27 Flanker vs X-31 EFM Vector

Su-27 Flanker vs X-31 EFM Vector at a glance — top speed 2,500 vs 1,448 km/h, max takeoff weight 33,000 vs 7,303 kg, built 680 vs 2 units.

Sukhoi Su-27 Flanker combat aircraft side profile drawing
🇷🇺 Su-27 FlankerFull specs
Rockwell-MBB X-31 EFM Vector military special mission aircraft side profile drawing
🇩🇪🇺🇸 X-31 EFM VectorFull specs
Specifications
Su-27 Flanker X-31 EFM Vector
Origin country 🇷🇺 Ex-USSR 🇩🇪 Germany🇺🇸 United States
Category Combat Aircraft Military Special Mission Aircraft
Manufacturer Sukhoi Rockwell-MBB
First flight 20 May 1977 11 October 1990
Year introduced 1985 --
Number produced 680 units 2 units
Average unit price $30 million --
Wing area 62.0 m² 21.0 m²
Wingspan 14.7 m 7.3 m
Height 5.9 m 4.4 m
Length 21.9 m 13.2 m
Maximum speed 2500 km/h 1448 km/h
Operational range 3,530 km -- km
Service ceiling 18,500 m 12,192 m
Max. takeoff weight 33,000 kg 7,303 kg
Empty weight 16,300 kg 5,175 kg
Total thrust 2 x 12,502 kgf 1 x 7,257 kgf
Performance Radar Chart
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Frequently Asked Questions

Which is faster, the Su-27 Flanker or X-31 EFM Vector?
The Su-27 Flanker is faster with a maximum speed of 2,500 km/h compared to the X-31 EFM Vector's 1,448 km/h, a difference of 1,052 km/h.
Which can fly higher, the Su-27 Flanker or X-31 EFM Vector?
The Su-27 Flanker has a higher service ceiling at 18,500 meters (60,695 ft) compared to the X-31 EFM Vector's 12,192 meters (40,000 ft).
Which is heavier, the Su-27 Flanker or X-31 EFM Vector?
The Su-27 Flanker has a higher maximum takeoff weight at 33,000 kg compared to the X-31 EFM Vector's 7,303 kg.
Which is larger, the Su-27 Flanker or X-31 EFM Vector?
The Su-27 Flanker is longer at 21.9 meters compared to the X-31 EFM Vector's 13.2 meters.
Which has been built in greater numbers, the Su-27 Flanker or X-31 EFM Vector?
The Su-27 Flanker has been produced in greater numbers with 680 units compared to 2 units of the X-31 EFM Vector.