No it wasn't. It was originally a 1.25 Zetec-SE, Ford then changed the name to a Duratec 16v.
Yes, in the Ka it is. The 60 PS Duratec 8v is a badge engineered (think: Alfa Romeo 156 / Fiat Tipo) Endura-E. But the 1.3 is a very different engine to the 1.25. As some of the articles allude, the 1.25 is much bigger and a squeeze to get it under the Ka's bonnet. It is possible, but it's harder.
Yes.
The WikiPedia article should include the Duratec 16v engine. I've amended some very limited bits, if I pull my finger out I'll do the rest.
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