I remember reading here somewhere that certain cars idle around 1000-12000rpm when rolling in neutral "to be ready" to accelerate. My guess is that may be the engineers decided that the only time a car is rolling in neutral is between gear changes, so it may be better to not allow the engine's rpm to fall too low since in a moment it will be in gear and will have to rev up to 2000 (or more) again.
Pretty dumb, so maybe there's a better explanation.
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is where you're going, not how fast.
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[Old] Piwoslaw's Peugeot 307sw modding thread
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