Head to head

Soyuz 2.1b 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: 8,200 kg

Vostok 8A92M: 3,800 kg

Side by side

7 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	Vostok 8A92M
Flights flown	25	93
Success rate	100%	98.9%
Payload to LEO (kg)	8,200	3,800
Length (m)	46.3	30.84
Diameter (m)	2.95	2.99
Launch mass (t)	312	282
Stages	3	2

Soyuz 2.1b

Flight record

100% success rate25 of 25 flown

2008peak 2021 · 4 flights2026

Maiden flight 2008-07-26. 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 is built by Progress Rocket Space Center of Russia (company profile on Space Index).Vostok 8A92M is built by RKK Energiya of Russia.

Full specifications and the complete launch history for each: Soyuz 2.1b · 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.