[Suicide Junkie]

Using the engines per move entry in the vehicle size data file to simulate this effect has two drawbacks one that the AI does not get it and the player must know that all available engines must be added to their ships designs to work properly.

It is actually almost trivial to get the AIs to use a standard QNP system.

Just add "standard ship movement" as an ability they like to add to their ships, and set a reasonable amount.
Since the AI adds already is set up to use twice as many for ships twice as large, you're done.
I even wrote an AI patcher program which does just that to convert stock AIs to use QNP.
(Note: TDM AIs are for stock, so they work too)