Some engines use different effects between ship classes. If you don't see it listed below, assume your engine will look like it does on the fighter chart.
Note: the "Junker Engine" (Refurbished Fusion Core Mk I) on the top left appears to be available only for Fighters.
Freighter Engines:
Note: There is no Black Market Union Corse Freighter engine at this time.
Other than that Freighter engines all look like their Fighter equivalents.
Transport and Gunboat engines appear to share engine effects.
Tranport Engines:
Note: There are no class 6 gallic black market engines for transports at this time. There are only class 5 gallic transport engines in the gallic civilian and GRN flavors.
Class 5 Black Market Gallic Civilian Transport Engine: http://steamcommunity.com/sharedfiles/fi...=268680157
Class 5 Black Market Gallic Royal Navy Transport Engine: http://steamcommunity.com/sharedfiles/fi...=268680095