Head to head

Soyuz 2.1b/Fregat-M vs Vostok 8A92

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 8A92: 4,730 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 8A92
Flights flown	36	44
Success rate	100%	90.9%
Payload to LEO (kg)	8,200	4,730
Liftoff thrust (kN)	4,150	3,996
Length (m)	46.3	30.84
Diameter (m)	10.3	2.99
Launch mass (t)	313	281
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 8A92

Flight record

90.9% success rate40 of 44 flown · 4 failed

1962peak 1966 · 10 flights1967

Maiden flight 1962-06-01. Retired.

Soyuz 2.1b/Fregat-M is built by Progress Rocket Space Center of Russia (company profile on Space Index).Vostok 8A92 is built by RKK Energiya of Russia.

Full specifications and the complete launch history for each: Soyuz 2.1b/Fregat-M · Vostok 8A92.

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