Sorry for the inconvenience about unclear rules. The rules state:
On each turn the car movement are computed this way:
* The car rotates to face the target point, with a maximum of 18 degrees.
* The car's facing vector is multiplied by the given thrust value. The result is added to the current speed vector.
* The speed vector is added to the position of the car.
* The current speed vector is multiplied by 0.85
* The speed's values are truncated, angles converted to degrees and rounded and the position's values are truncated.
This means every point happens instantly after the previous one, and that speed change is immediately occurring after the instant rotation.
If you find this unclear, let me know how I could clarify it 