Head to head

Long March 4B vs Rokot/Briz-KM

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

Long March 4B: 4,200 kg

Rokot/Briz-KM: 1,850 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	Long March 4B	Rokot/Briz-KM
Flights flown	58	31
Success rate	98.3%	90.3%
Payload to LEO (kg)	4,200	1,850
Liftoff thrust (kN)	2,961	1,870
Length (m)	44.1	29
Diameter (m)	3.35	2.5
Launch mass (t)	249	107
Stages	3	3

Long March 4B

Flight record

98.3% success rate57 of 58 flown · 1 failed

1999peak 2020 · 5 flights2026

Maiden flight 1999-05-10. Still flying.

Rokot/Briz-KM

Flight record

90.3% success rate28 of 31 flown · 3 failed

2000peak 2013 · 4 flights2019

Maiden flight 2000-05-16. Still flying.

Long March 4B is built by China Aerospace Science and Technology Corporation of China.Rokot/Briz-KM is built by Russian Aerospace Defence Forces of Russia (company profile on Space Index).

Full specifications and the complete launch history for each: Long March 4B · Rokot/Briz-KM.

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