The combustion chamber body incorporates a smooth-wall design, utilizing the same technology as the HM7B and Vulcain engines, except significantly lengthened.

[3] To enable re-ignition, the Vinci engine is paired with an auxiliary propulsion unit (APU), which performs two important functions.

Secondly, the APU can produce a low level of thrust, to either settle floating propellant in the tanks before re-ignition of the Vinci engine or to make fine orbital adjustments (similar to a thruster).

In July 2017, the newly-formed Ariane Group, a joint venture between Airbus and Safran, reported that the first flight models of the combustion chamber had entered production.

[5] In October 2018, Ariane Group announced that qualification tests had been completed, proving the engine and upper stage were capable of operating for at least 900 seconds and four burns.