My current D4-engined S90 is quieter than my previous D5. I assume it's because it has the active noise reduction system built into the audio.
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MY2017 Volvo S90 Inscription D5 PP AWD, Onyx Black, Winter Pack and retro-fit rear parking camera
MY2020 Volvo S90 Inscription Plus D4, Osmium Grey, Winter Pack and other bits and pieces
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