From UK Dyno results it looks like we have about the following losses

Zetec 2L ~ 27 BHP
Duratec ~ 45 BHP

Seen on several cars now. You guess is a good as mine as to why the 6 pot looses so much more

Mad Mole
Visit Mad Moles Mondeo Madness
2L Zetec, Cams, Stage 2 head, Valve work, Powerflow, Unichip, AEM Ram, K&N, Ecotek, 75mm Lower etc.
192 BHP, Faster than a speeding Duratec!