Comment by lawaaiig
2 days ago
EVs most definitely do not decelerate faster. Their increased weight leads to decreased braking capabilities, which, combined with their faster acceleration, makes them potentially harder to control and more deadly in collisions due to the greater force of impact.
The regenerative braking force is generally much stronger than engine braking in ICE vehicles, as long as the battery isn't full.
In a sudden stop event, assuming the driver does the same tasks (lifts foot off accelerator pedal, moves to brake, then presses brake) - an standard ICE vehicle simply stops accelerating (minimal engine braking). An EV starts decelerating as soon as the foot is lifted from the accelerator.
We're not talking EVs that are double the mass (usually 10% increase over ICE), so a 20% reduction in speed (probably more) on an impact is more important than that 10% weight increase (impact force is roughly equal to mass x speed).
Based on a cursory glance at google results, 10% is at the lower bound of weight increase, and in sudden stop scenarios I would assume tyre grip is the main factor in speed reduction potential, not engine/regenerative braking. I'm not aware of any convincing studies showing a clear advantage for EVs in these scenarios.
Petrol engines have a nontrivial amount of engine braking due to the throttle. If you have a manual car you can easily compare it to coasting by disengaging the clutch. Bicycles also naturally coast thanks to the freewheel. If you're used to a bicycle then the engine braking of a car is quite surprising.