Question about creating a Train in Blender and import it in UE4


Currently, im planning on creating a Train (for Reference: German BR 420 and 472) in Blender and than import it to my Scene in Unreal Engine (Just a “small” Level with the Train Driving around to create an animated Scene).

But my Problem is, that i don’t have any Blueprints for my Reference Trains. So how can i create the Train in Blender and Scale it perfectly to the UE4 Sceleton, so that the Train isn’t to small and not to big?
Are there any Plug-Ins that can help me with that?

Thanks in Advance!