Saturday, January 29, 2011

Estimating Energi's Internal Dimensions

2011 Fod Focus
CUV's have been a favourite of American families in recent years mainly because of the high utility value. Apart from a higher seating level which reduces stress on the knees, larger cargo and passenger space means the car can be used for more trips.

That is why Energi is a much more practical vehicle compared to Volt. But, the actual utility depends on the interior dimensions of Energi, which have not been disclosed. In my earlier blog I compared the external dimensions to other vehicles. Let us take a look at the likely internal dimensions in this post.

First thing to look at is the C-Max family. Until the B piller (i.e. the one between the rear seat row and the cargo compartment) Energi/Hybrid will be essentially same as the larger C-Max ICE car. We could also compare to Focus, which is based on the same C platform and Escape Hybrid which has similar dimensions.

In light of these, I expect the front seat dimensions to be very close to the C-Max dimensions of 40.8, 42.6, 55.9 and 54.7 for head, leg, shoulder & hip.

Rear dimensions may be slightly different because of the way C-Max is arranged. Also, C-Max is taller giving a very good rear headroom. I expect Energi to match Focus, though, except possibly for the headroom. That gives us 40, 42, 56 and 54 for head, leg, shoulder & hip. But, rear headroom does depend on where the batteries are - if like Nissan Leaf. some of the cells are under the rear seats, the headroom will be less.

Cargo room is far more difficult to figure out, because that is where the battery is likely to go (see Where Is Energi's Battery ? ). The best arrangement might be to put the battery flat under the cargo floor (and do away with the spare tire). This would raise the cargo floor a bit - and the rear seats would raise too - so that when folded they would be flat with the cargo floor. I hope Ford doesn't go with the option of a large vertically placed battery like the Focus, which eats into cargo space and also makes the floor not flat when the rear seats are folded. My expectation is that Energi will not suffer this fate - esp. because it will have a much smaller battery compared to Focus EV. Energi will probably have cargo space similar to the Escape hybrid and Focus ICE, between 24 and 30 sq ft.

Energi Internal Dimension Estimates
So, as you can see from the above estimates, shown in italics, Energi will probably have much better internal dimensions than Volt, as one would expected.


  1. You may want to look here:
    and add estimates of the load area length and height.

  2. @plcfischer Thanks for the link. I had not seen those numbers before.

    The problem though is - we don't know how much of that load area will be taken up by the battery. Battery could reduce the height - and even length.

    BTW, European C-Max is slightly different in external dimensions than Energi. But that doesn't matter in this case.

  3. EVNow, I agree with you that we are uncertain. I really would like for Toyota and Ford to produce real numbers. I am almost sure that my next car will be one of the Ford C-Max hybrids or a Prius V. If the C-Max plug-in has the same length load area as the European version and is only two inches shorter in height, that would be my preference based on the very limited information currently available. 67 x 40 x 37 inch load area would meet my needs. After that give me the best MPGs for my typical day.

  4. @plcfischer I'll do one more post on the cargo area / battery size. May be I can ring out something.

    As to best mpg for your typical day, it will be difficult to beat an EV (duh!) or a Plug-In. Check the post I made about saving 90% of gas - do something similar for your needs and see.

    How much driving do you do every day ?

  5. EVNow, my typical day is about 20 miles, but when I go past that it is 80 or so miles. I really hope the C-Max Energi has a 20-25 mile EV range, gets about 40 MPG after the battery is depleted and holds the stuff I normally carry. That would make my typical day gas free and my 80 mile days 53 MPG days. The break even millage would be 100 miles for taking my SO's Prius. I have too much range anxiety to go pure EV for 80 miles. Maybe when the EV range gets to 150 miles.