Honda Explains Why 2014 Accord PHEV is 70% More Fuel Efficient than Conventional Version

5 years ago by Rob Scardino 15

2013 Honda Accord PHEV

2013 Honda Accord PHEV

If you’re one of the forty-five plus customers who have already purchased a 2014 Honda Accord Plug-in Hybrid, read no further. You already know why your car is much more efficient than the standard gas version (not to mention the 1991 4-cylinder Accord one InsideEVs contributor drove in college). The rest of you fuel misers should continue reading if you know what’s good for you.

Honda claims this new two motor system is 70% more efficient than an equivalent internal combustion engine powered car. Here’s why:

As you might expect, the Accord PHEV has an all electric range. You can drive 13 miles without using any gas whatsoever, while the hybrid mode achieves a 46 MPGe rating. The hybrid powertrain accounts for 39% of the fuel savings over the standard Accord. Sounds reasonable so far, especially for you Prius drivers.

2014 Honda Accord PHEV in Ultra Fuel Efficient Black

2014 Honda Accord PHEV in Ultra Fuel Efficient Black

Honda claims that upgrades to the gas motor and the generator in the PHEV Accord increase fuel efficiency by another 10%. That’s a 49% improvement in fuel economy for those of you keeping score at home, but we’re not done yet. Reaping the benefits of cooled exhaust gas recirculation and the magic of VTEC, Honda’s variable valve timing and electric control system, the new 2.0 liter inline four cylinder gas engine in the PHEV uses 10% less fuel than the outgoing 2.0 liter. 59% and counting.

Then there’s the Electric – Servo regenerative braking system. This design converts more kinetic energy into electric energy than the typical hybrid regenerative braking system, and Honda believes it increases efficiency by an additional 8%. Add some low rolling resistance tires and some aerodynamic tweaks accounting for the final 3% and bingo. You’ve got yourself a plug-in hybrid that’s 70% more efficient than the ICE powered version of the same car. In response, we’re told Toyota is introducing a new paint color for future Prius drivers called “Green with Envy.”

While we don’t doubt Honda’s numbers (and we’d love to get our hands on this new PHEV to prove them right), the only measure of real world fuel efficiency that matters is how much it costs you to fill up. Here’s a call to all Accord PHEV owners.  Share your experience with us.  Are Honda’s estimates accurate?

Source: Green Car Congress

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15 responses to "Honda Explains Why 2014 Accord PHEV is 70% More Fuel Efficient than Conventional Version"

  1. David Murray says:

    So wait a minute.. now they are using a two motor system? What, are we talking about Toyota style hybrids? If so, why should Toyota be green with envy?

    1. PHEV fan says:

      Because this mid-size sedan gets better mileage than a Prius V and within 10% of a std Prius. That’s before you factor in the plug. Put this against a Prius plug in and you’re neck and neck.

  2. Jeff says:

    Sorry to nitpick, but the “46 MPGe” should just read “46 MPG”. No “e”.

    “MPGe” implies that some or all of the energy comes from the grid. But the 46 MPG rating for the 2014 Accord PHEV is for after the battery charge is depleted and its getting all of it’s energy from gasoline.

    1. Rob says:

      Good catch Jeff. Thanks!

  3. Bonaire says:

    That front grille is tragic…

    1. kdawg says:

      LOL, i think that “H” needs to be a little bigger. I took a snapshot of this at the Detroit Auto Show because it was so gawd-awful.

  4. GreenDay says:

    “Sorry to nitpick, but the “46 MPGe” should just read “46 MPG”. No “e”.”

    Correct, so compare that to the Volt at 37mpg……lol

    1. Philip Katz says:

      I have a 2014 Honda Accord PHEV. It’s a great looking and riding car. Tons of grest features.I think its hybrid MPG numbers are a little fluffed, but the gas mileage is over 40 MPG. The 12 mile or so electric range is accurate. In truth, they need to get the electric range to 50 miles to make the electric functionality really useful for the average driver. With just 12 mi electric range, you need to rely predominantly on the gas engine, which defeats the purpose. .

      1. Rob says:

        Thanks for the feedback Philip. So if you had to do it over again, would you go for an Accord PHEV, or try something with more EV range?

        1. kdawg says:

          Did you buy it, or do you “have” it? If you bought it, i’m wondering why you paid a premium price for a car w/such a small EV range?

  5. Andrew says:

    I own my 2014 Accord PHEV for 7 weeks now. On my first tank of gas I averaged over 950 miles and 85 MPG. I average around 30 miles a day and no more than 15 miles per trip and I am able to charge in the middle of the day and go to clients at night (I work from my home). On longer drives on the highway (30 miles each way), I average between 45-50 MPG. I’m sure it’s only a matter of time until we can get 50 miles per charge in just a few hours. I know the Volt get 40 but my Accord seat 5 and is far more comfortable the Volt.

  6. Arun Srinath says:

    I have 2014 Accord PHEV in Burnished Silver. Bought 2 months ago, and have about 2200 miles on it. Im averaging an incredible 155 mpg on it and filled up only 3 gallons x 4 times in last 2 months, if I keep my speed about 40 and under with some stop and go-i can get 17 miles all electric in accord phev, i drove phev prius-can only muster about 13 miles on that. I have a 2 kW solar pv array on my home and its pennies to charge. I do go to some charging stations during the week also. I mainly keep my trips to under 20 miles per day, but in the same 2.5 gallon take longer trips. Here are some of my #’s:
    40 miles round trip, charging only 1 time: 94 mpg
    20 mile round trip, charging only 1 time: 160 mpg
    160 mile round trip, charging 3 times: 85 mpg
    Hybrid mode only: been averaging 55 mpg if keeping speed at about 60 to 65. Impressive for that much weight.

    I have driven the Volt and although its a nice alternate, I prefer the Accord PHEV even with reduced range-mpg is much better in accord than volt when both in hybrid mode, and prefer over plug in prius-the mpge is better than plug in prius. Like the other owner mentioned Accord PHEV higher in comfort more seating and with Adaptive cruise and LDW, I tell others it drives like a high end Acura but truly a green vehicle and beautiful to drive. My only gripe is would like slightly more range. But may be able to get after market 3 kWh battery in near future to boost it another 15 miles or so.

    1. Rob Scardino says:

      Thanks Arun. How much did your home solar array cost up front, if you don’t mind my asking?

      1. Arun Srinath says:

        HI Rob, you would be amazed at the price. I bought the hardware (panels and inverter, DC wiring) thru an outfit in Victorville called Solar Home Inc, I am using Mitsubishi 190 w for the panels (really good efficiency rating), and SMA sunny boy for inverter. I paid for installation separately at about .70/watt thru a separate contractor. The total cost was approx $7100 with install and hardware combined (before applying 30% fed tax credit and $600 SCE utility incentive), but I did the drawings myself required thru the county to get the permit, im in county territory. After applying the fed tax credit and rebate, my net cost was only $4370. Thanks for replying.