Its SAAAAD that in 4.9 not support alembic. One of ideas was import
Geometry cache (alembic) by Houdini engine and render it inside UE4, but in a forum I find -"plugin does not support animation at the moment. The plugin is still in beta and we have a long list of features / improvements in mind, animation is definitely one of them. " Forums | SideFX This would be a game changer if we could render alembics using ue4…