When Buick Tianzun 3,0 is idling, the tachometer shakes.

I understand your question. There are several models of Yinglang, the top speed is 3800 or 5600, but no matter which one you have, it can reach 4000. Because the so-called maximum speed is not how fast you can reach on the dashboard, but the maximum torque that the car can reach at this speed. Step on the accelerator and put into first gear. It can go to 7000-8000 rpm.

So it's not the same thing as your understanding of 4000 rpm.

Contact me if you have anything else, and hope to adopt it.