Head to head

Atlas IIA 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

Atlas IIA: 6,580 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	Atlas IIA	Vostok 8A92
Flights flown	23	44
Success rate	100%	90.9%
Payload to LEO (kg)	6,580	4,730
Liftoff thrust (kN)	2,479	3,996
Length (m)	47.54	30.84
Diameter (m)	3.04	2.99
Launch mass (t)	204	281
Stages	3	2

Atlas IIA

Flight record

100% success rate23 of 23 flown

1992peak 1996 · 4 flights2002

Maiden flight 1992-06-10. Retired.

Vostok 8A92

Flight record

90.9% success rate40 of 44 flown · 4 failed

1962peak 1966 · 10 flights1967

Maiden flight 1962-06-01. Retired.

Atlas IIA is built by Lockheed Martin of the United States (company profile on Space Index).Vostok 8A92 is built by RKK Energiya of Russia.

Full specifications and the complete launch history for each: Atlas IIA · 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.