To be fair to the REX, if your trip is 100 miles and the rex cuts in at 72, you use it for 28 miles = 0.72 Gallons. Fossil Fuel consumption for your trip is way better than 39MPG, try about 140MPG.michaelbmw wrote: I really don't care if my next car gets 130 or 110 MPGe, I just want to be able to charge at home at night and get through my 100 mile daily drive without worries about cold weather, battery fade, errands, or access to workplace charging. The Bolt seems to offer this, and no 80 or even 100 mile class car does.
Even if the Bolt turns out to not quite equal the MPGe of the I3 Rex while in EV mode, there is no doubt it will be vastly better after the 72-mile mark when the Rex turns into a 39 MPG hybrid.
I agree it is a better idea to have an EV that covers your daily commute distance without running out of range. If you look at the distribution of daily commute distances, the i3 covers the majority. Increasing range requires more cost, manufacturing, resources and weight.
Regen does put some of the energy back into the battery, but as efficient as the i3's regen is, you do not get it all back. It takes less energy to accelerate a lighter car to speed than a heavy one. The only time it makes no difference for a heavier car is when it is coasting or in regen. Other factors like aerodynamic resistance come into play when running at speed and it certainly looks like the Bolt isn't the leader there.