I think engines depended on manufacturer.. I think 3????Also when they were made, powerplants changed over time....My info says, 3 caddy v12's, no stuffers....
Thats the point, A squad of DD's would be like a pack of ravenous wolves...Just 5 of them, charging, line abreast, zigzaging and bangin away w 5in....Then in unison, they make a 90deg turn to port, and loose 20 longlancetorps at the fleet.... Make smoke, continue their turn behind smokescreen,reload torps, pop out of the smoke, and fire 20 more....After that, the order is ATTACK AT WILL.....By then, Hopefully enemy DD's would be spawning too... Oh yeah!!!!