[EVmetro]

Originally Posted by MetroMPG

1) Hybrids have a downsized ICE vs. a comparable non-hybrid = more efficient when running.

This makes good sense. What if you took that smaller motor and put it in the comparable ICE, minus all of the Hybrid related technology?

Originally Posted by MetroMPG

2) Hybrids kill the ICE when propulsion is not required (coasting/when stopped) = more efficient in those scenarios.

Killing the engine when it is not needed makes good sense. What would happen if you killed the engine on the comparable ICE as well? Efficient fuel management does not need to be unique to hybrids, does it?

Originally Posted by MetroMPG

3) Regenerative braking (and coasting) captures energy for later use that would otherwise be wasted = more efficient than no regen.

There certainly is waste energy to be harvested, but how much of it is actually harvested? What penalties come from hauling around the waste energy harvesting system? Once the harvested energy is collected and then depleted, you have no waste energy to use, so how does it get replenished? How much additional gasoline is needed to haul this system around or to recharge it when one is traveling long distance?

Originally Posted by MetroMPG

4) Many hybrids permit limited, low speed electric propulsion, rather than ICE propulsion = more efficient again.

This makes good sense. This is not available on an ICE car, but is this enough to offset the efficiency that the ICE version would have if it was equipped with the smaller more efficient motor and the reduction of weight and rolling resistance?