[dmpk2k]

While true (beyond 30-50km/h), that assumes that cars are driving at a steady state. Obviously, cities with much more stop-and-go require more revving of engines.

Acoustic tyres are also gradually becoming the norm, primarily with EVs. This cuts noise by several decibels.

So it's not an unreasonable claim per se.

[Vinnl]

That makes sense, thanks for updating my priors!