1.4T T-Cross, there's a buzzing sound when accelerating above 60 km/h, but no sound when not accelerating. Looking for answers to the issue.

Is it normal for a 2015 model 2.0L automatic transmission car to have the RPM around 1300 at 60-70 km/h, and when slowing down for a turn then accelerating again, the RPM suddenly rises and acceleration is slow, with the RPM at 1600 to 1700 at 60 km/h and not dropping, and sometimes after turning off the engine and restarting it behaves normally?

The car makes a buzzing noise when driving over 80 km/h.

When I step on the clutch of my Mitsubishi ASX manual, why does it make a buzzing sound, like the sound of accelerating?

What is the top speed of your Eclipse Cross? When I floor the accelerator, the highest I can reach is 160 km/h, and it drops to 140 km/h on slight inclines.

When driving above 80 km/h, there's a noticeable noise near the passenger side A-pillar. At higher speeds, like 120 km/h, the noise becomes even louder.

1.4T T-Cross, there's a buzzing sound when accelerating above 60 km/h, but no sound when not accelerating. Looking for answers to the issue.

Is it normal for the Sunny to have loud noise at around 60 km/h?

Why does the Ford Territory suddenly lose power and then accelerate again multiple times when normally accelerating to 60 km/h?

The T-Cross is terrible; the acceleration is sluggish. It only makes noise without actually speeding up.

For a 2020 GS5 with over 30,000 kilometers, experiencing continuous jerking when lightly pressing the accelerator at speeds above 100 km/h, but not when pressing slightly deeper, and with no fault codes, what could be the issue?