https://www.youtube.com/watch?v=45JNgvelcJM&feature=youtu.be

The HUD seems to be displaying correct speed.

I would recommend trying this out in 3rd person mode, Hunter driver has a limited view so it might seem like you are driving slowly, however if you watch the rear mirror (panel computer) or if you look to your left/right you will be able to see you are driving somewhat fast. Also keep in mind that the terrain you used is a landing strip 1.1 km long.

Putting some obstacles along the way that you can observe during the ride might help you to observe the speed as you pass them better.

Just look at the Second panal its between fast and Slow the First Run was With fast forward and the Second without

Let's look at it this way. The runway is 1.1 km long and you were able to get from end to another in 1 minute which would make ~60 km/h average, and that is while not considering that you have stopped and the acceleration/braking time.

Try to take the Civilian Hatchback but perhaps on a normal road, runway might look like a normal road but it is in fact a huge road (with all the road markings scaled)

I will upload a Video With me and Another car on a small Road today or tomorrow With 2 Sport backs

https://www.youtube.com/watch?v=j6gmj2iK48E&feature=youtu.be&pxtry=1