These are data of car speed at various RPMs.
Same road, different driving stile:
one at 0 RPM, where we have the car running on electric power up to 70 km/h, and one at 1300 RPM, that seems to be the sweet spot of the engine.
Speedy driving leads to higher RPM and a wider distribution.
Use of EV mode, leads to higher RPM than normal: note the aggregation around 2100 and the gap between 1300 and 1600.