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Is this new engine based on an actual GM-Opel design or is it based on a Fiat design? I know that the article obviously wouldn't state it so I thought I'd ask. I know that GM-Fiat Powertrain agreed to design and build engines jointly, but wasn't sure if when released they'd use their own designations -- Fiat Auto using Multijet JTD and GM-Opel using CDTi Ecotec.
