As the original poster of this thread, I'd like to point out that we have no "pure" parallel hybrids - though we have several that are close: the Honda Insight (old and new) and the Civic hybrid have a parallel engine and motor - but they don't use the electric motor alone, and the battery is not charged with a plug. So they are considered "mild" hybrids, as they don't take full advantage of the significantly higher efficiency of the electric motor; as it is about 3X more efficient.
The VW XL1 is much closer to a "pure" parallel hybrid - it only bends the definition because it can charge the battery with the diesel engine in a particular situation.
So, any discussions should reference actual parallel hybrids.
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