Displacement is dependent on time and velocity.
If I walk to the train station from my home it will take me about 20 minutes to get there.
If I use my bike, I will be there in about 5 minutes.
Conclusion: my velocity on bike is 4 times as high as my walking speed.
It's all in the following formulae:
In the metric system we use meters, seconds and m/s,
or kilometers, hours and km/h.
You use whichever units you like.