Head to head

Soyuz-U 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-U: 7,050 kg

Vostok 8A92: 4,730 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-U	Vostok 8A92
Flights flown	71	44
Success rate	100%	90.9%
Payload to LEO (kg)	7,050	4,730
Length (m)	34.54	30.84
Diameter (m)	2.95	2.99
Launch mass (t)	298	281
Stages	2	2

Soyuz-U

Flight record

100% success rate71 of 71 flown

1982peak 1987 · 10 flights1995

Maiden flight 1982-12-23. Retired.

Vostok 8A92

Flight record

90.9% success rate40 of 44 flown · 4 failed

1962peak 1966 · 10 flights1967

Maiden flight 1962-06-01. Retired.

Soyuz-U is built by Soviet Space Program of Russia.Vostok 8A92 is built by RKK Energiya of Russia.

Full specifications and the complete launch history for each: Soyuz-U · 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.