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      01-18-2020, 05:53 AM   #1
Bonnygator
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Drives: BMW E89 Z4 sDrive23i
Join Date: May 2019
Location: Belgium

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218hp n52b25?

Hi all,

Just a quick question. I can't help but notice that BMW also sold a version of the N52B25 that made 218HP (e.g. on the E85 2.5si) instead of the 204HP that mine has (sDrive23i). Does anyone know the difference between these two engines?

My guess is it's some sort of ECU tune difference, as I can't really find any meaningful differences on realoem so it's basically the same engine. But if it is simply a tune, then I'd imagine both the 2.5si and the sDrive23i could be cranked up to the same HP level. Screening some tuning websites shows that the 2.5si gets up to 235HP and the sDrive23i to about 220HP, which doesn't really make sense if it's the exact same engine.

Thanks! (not sure this was the place to post this)
Appreciate 0
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