Head to head

Soyuz 2.1b/Fregat-M 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-M: 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-M	Vostok 8A92M
Flights flown	36	93
Success rate	100%	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)	10.3	2.99
Launch mass (t)	313	282
Stages	4	2

Soyuz 2.1b/Fregat-M

Flight record

100% success rate36 of 36 flown

2017peak 2021 · 8 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/Fregat-M 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/Fregat-M · 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.