My previous comments on the Zephyer are here.
I have heard that the Zephyr will get the new 3.5L Duratec 35 engine, after it is introduced with the 3.0L. The HP numbers on the 3.5L aren't out, but they should be about 250HP, based on displacement. The Zephyr will also get AWD. Ford's strategy, apparently was to get the car out soon, and improve it later. Still no plans for a manual transmission, from what I have heard.
The larger engine and AWD will really help the car, I think. I hope that people aren't turned off by the weak first model.