"My understanding is that GM bid for the plant in Poland, and not Fiat.
Only the 1.9 engine was covered by old Fiat/GM joint venture agreements. With the introduction of a 2.0 version, Opel no longer has any obligations towards Fiat. The two stage turbocharged version was not developed by Fiat, but by Saab, initially for their own use. Now that Saab no longer belongs to GM, this engine is no longer available to Opel/Vauxhall until a solution is found. The Insignia was validated and released with this engine prior to GM's sale of Saab. Start of production is therefore on hold at present".
My link that seems to not work any more was from oct 10th, it seems GM have relinquished their 50% holding in the polish plant, and Fiat Power train is purchasing it.This plant was where the 1.3 multi jet was built that did indeed find its way not only into Fiats but Opels [GM] Suzuki and indeed the new Ford KA to name just a few......As for the "Saab" built twin turbo engine! It seem Fiat have other ideas on who built that! as its down as fiat powertrain.It debuited in the Lancia Delta at 190ps and the Saab 9 3 at 180ps both back in 2008 i believe......