Head to head

Atlas IIA 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

Atlas IIA: 6,580 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	Atlas IIA	Vostok 8A92M
Flights flown	23	93
Success rate	100%	98.9%
Payload to LEO (kg)	6,580	3,800
Liftoff thrust (kN)	2,479	3,996
Length (m)	47.54	30.84
Diameter (m)	3.04	2.99
Launch mass (t)	204	282
Stages	3	2

Atlas IIA

Flight record

100% success rate23 of 23 flown

1992peak 1996 · 4 flights2002

Maiden flight 1992-06-10. Retired.

Vostok 8A92M

Flight record

98.9% success rate92 of 93 flown · 1 failed

1964peak 1979 · 8 flights1991

Maiden flight 1964-08-28. Retired.

Atlas IIA is built by Lockheed Martin of the United States (company profile on Space Index).Vostok 8A92M is built by RKK Energiya of Russia.

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