I also agree with the comments on timing. Also you might be able to fake the engines look in after effects. But I think they look fine as is. I mean, technically the Tantive is already flying by and the engines are at full force, where as the clip that was posted above what the ship getting started. The fire wouldn’t necessarily be visible as it’s whizzing by. Just my 2 cents

Also I have a node setup for blender that will fake the engine glow in post. If you want I can send you the .blend file and you can play around with it.