Hi Tim,
Matt is right. I had a 2004 2.5 saloon. It was the Spirit model with the factory bodykit on it. It didn't have the folding rear seats, it didn't have the Bluetooth phone pack, and I really wished I'd just gone the whole hog and bought the 3.0 engine too.
I later saw the S-Type with the 3.0, bluetooth, folding rear seats and much lower miles so swapped over.
My X-Type was pretty handy in the snow, although the S-Type is still surprisingly useful. Last winter the 2 girls I lift shared with to work came with me the whole time because their cars (Audi A3 and VW Beetle) were completely useless. It's significantly better in the snow than the Rover turbo too, which was similarly useless (the diesel is good though... must be that Torsen LSD making the turbo ****)
Mark is right too; the V6 engines are Ford Duratec blocks, crankshafts, conrods and pistons

The Mondeo ST220 got the exhaust headers back from the Jaguar version of the engine though. The cylinder heads upwards are pretty much unrecognisable but the basic DNA is there