Head to head

Soyuz 2.1b/Fregat vs Vostok 8A92M

Two vehicles in the same payload class. Every figure below comes from the same two sources for both rockets, and a row appears only when both publish the input.

Payload to low Earth orbit

Relative

Soyuz 2.1b/Fregat: 8,200 kg

Vostok 8A92M: 3,800 kg

Side by side

8 comparable figures

The highlighted value wins the row. Rows where neither direction is better, like length or stage count, highlight nothing.

Metric	Soyuz 2.1b/Fregat	Vostok 8A92M
Flights flown	26	93
Success rate	92.3%	98.9%
Payload to LEO (kg)	8,200	3,800
Liftoff thrust (kN)	4,150	3,996
Length (m)	46.3	30.84
Diameter (m)	2.95	2.99
Launch mass (t)	312	282
Stages	4	2

Soyuz 2.1b/Fregat

Flight record

92.3% success rate24 of 26 flown · 2 failed

2006peak 2011 · 4 flights2026

Maiden flight 2006-12-27. Still flying.

Vostok 8A92M

Flight record

98.9% success rate92 of 93 flown · 1 failed

1964peak 1979 · 8 flights1991

Maiden flight 1964-08-28. Retired.

Soyuz 2.1b/Fregat is built by Progress Rocket Space Center of Russia.Vostok 8A92M is built by RKK Energiya of Russia.

Full specifications and the complete launch history for each: Soyuz 2.1b/Fregat · Vostok 8A92M.

Specifications from Launch Library 2 by The Space Devs, launch records from Space Index. Derived figures are computed here; see sources and method.