Head to head

Soyuz 2.1b/Fregat 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: 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	Vostok 8A92
Flights flown	26	44
Success rate	92.3%	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)	2.95	2.99
Launch mass (t)	312	281
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 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 is built by Progress Rocket Space Center of Russia.Vostok 8A92 is built by RKK Energiya of Russia.

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