Thinking on from what Peteo48 said about 'Drone', I was out this afternoon and covered around 50 miles, on various types of road, listening for what sort of noises I was hearing.
At 30 mph all I could hear was the heater fan on position 3 or above.
At 70 mph all I could hear was wind noise and maybe a bit of tyre noise as well, depending on road surface.
Accelerating onto a motorway at maybe 4000+ rpm, yes, you will hear the engine working, but to my mind this is not objectionable. I would submit in that circumstance, any car of this type will be the same, remember we are not driving a £30k limo, but a fairly upmarket 5 door hatchback.
Drone to me, is a noise akin to a worn wheel bearing, a constant hum/whine whose frequency may rise/fall with road speed.
If Peteo48 is concerned about 'Drone', then he should take the car back to the dealer, for examination and possible rectification. Hope this comment is helpful.