I have never really understood worrying about the neighbours. Mine haven't complained yet and they get to listen to the cold V8 'morning chorus' whether they like it or not from 6am onwards quite often round these parts
Our neighbours are great - they’ll never say the noise from our cars is a problem, but I suspect that is because generally we’re nice neighbours (even if I say so myself).
I’m sure that they would prefer that we have quieter cars, especially when I used to have regular early starts, but if that’s the worst thing about us then it’s not so bad.
However if the relationship between neighbours is a little more tense, then I can imagine a loud car, could be frustrating, especially cold starts very early or very late.
For those of us saying noise Ian my a problem that must mean that we’re either otherwise wonderful neighbours or absolutely terrible selfish neighbours!
PS As an example of how lucky they are to live next to me, I used to leave home before 0400 2-3 times every week and I used to take the quietest car we owned...
...a car with a 6.2 litre V8
I now have a Smart which would be ideal for a quiet departure for those early flights but I think I only flew a couple of times before lockdown 1.0. Terrible timing!