BMW uses the phrase "Twin Power Turbo" for marketing speak. Either referring to a twin scroll single turbo or two turbos (a bit confusing).
This has Twin Turbo, which just is two turbos (as seen in the photos). BiTurbo or Twin Turbo is basically two turbos. Sometimes in paralell, sometimes serial, but still two separate turbos.
The exception being BMW's "Twin Power Turbo" which can be one or two turbos as explained above...
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