Head to head

Delta 2914 vs Kuaizhou 1A

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

Delta 2914: 724 kg

Kuaizhou 1A: 300 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	Delta 2914	Kuaizhou 1A
Flights flown	30	31
Success rate	93.3%	90.3%
Payload to LEO (kg)	724	300
Length (m)	35	19.4
Diameter (m)	2.44	1.4
Launch mass (t)	130	30
Stages	4	4

Delta 2914

Flight record

93.3% success rate28 of 30 flown · 2 failed

1974peak 1977 · 8 flights1979

Maiden flight 1974-04-13. Retired.

Kuaizhou 1A

Flight record

90.3% success rate28 of 31 flown · 3 failed

2017peak 2023 · 6 flights2025

Maiden flight 2017-01-09. Still flying.

Delta 2914 is built by McDonnell Douglas of the United States.Kuaizhou 1A is built by ExPace of China (company profile on Space Index).

Full specifications and the complete launch history for each: Delta 2914 · Kuaizhou 1A.

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