# What are the costs of the various different engines in current use?

This may be impossible to answer, since the data is often not disclosed.

But in an article, about ULA getting RD-180's from Russia it claims:

Each engine reportedly costs between \$11 to \$15 million.

I have never seen prices quoted for a Merlin 1C or 1D, or say an RS-68 (Or RS-68A), an SSME or an NK-33/AJ-26. Comparing different engines in terms of cost could be very interesting.

Of course, an RD-180 has the thrust of 10 Merlins or so, or almost 2 RS-68s or SSME's so probably worth noting common number of units of each used in a typical launcher.

• This seems awfully broad as it currently stands, perhaps a more narrow focus would help? – PearsonArtPhoto Apr 29 '14 at 1:38
• Many different dimensions complicate things: reusability, power range, fuel type, throttle range, restartability, etc. Comparing on cost alone (while not in and of itself easy) will be somewhat meaningless. – Aaron N. Tubbs Apr 30 '14 at 22:04
• @AaronN.Tubbs Agreed, but it is a starting point. One RD-180 suffices where 9 Merlin 1Ds are needed. BUt knowing the price of both provides insight into design choices made. – geoffc Apr 30 '14 at 23:48