Vauxhall Omega Engine Transplants?

Hope somebody can help me. I own a 2.2 Omega Saloon. The engine is burning oil like it's going out of fashion.
My wife has an S reg Vauxhall Vectra 2.5 V6 with a knackered body etc.
What I want to know is quite straightforward.
I want to know if the Vectra Engine will fit my Omega. The Vectra is manual, the Omega is Automatic.
If anybody does know for certain if it's possible, I would love to hear from them.

brian981222@hotmail.co.uk

regards, and thanks for reading this.

Brian