"Engine drone" refers to a continuous, low-pitched sound produced by a machine or vehicle, typically an engine. It is often described as a constant humming or buzzing noise. Full definition
In most driving, its stepless torque manipulation creates the kind of engine droning and elastic throttle response that make CVTs such a bummer despite their undeniable efficiency. (automobilemag.com)
There is enough power to make the car usable around the city, but the three - cylinder engine drones like a coffee shop guitarist. (automobilemag.com)
It rides well, it's agile and fun to drive — subjectively, I doubt you'd have more fun in a Golf GTI — and its surprisingly refined, with very little tyre roar or engine drone making its way into the cabin at a cruise. (carmagazine.co.uk)