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Top speed and mileage.

Discussion in 'Gen 2 Prius Fuel Economy' started by The Tramp, May 15, 2008.

  1. The Tramp

    The Tramp Italian Prius Expert

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    I don't think anybody ever did such a test...... :D

    Having had the need to cross Germany from Hannover to Strasbourg, and since germany is the only country with no speed limits, I took advantage to test the Prius to it's limit.

    The distance between the two cities is just over 600 km (375 miles)which I covered in just over four hours.

    The car can keep an electronically limited speed of 173 km/h (108 mph) and mileage varies between 8,5 l*100 km (27,6 mpg) and 8,9 l*100 km (26,4 mpg).

    On a downhill I got a maximun of 175 Km/h (109.3 mph) as proven by this picture (taken by girlfriend) :rolleyes:
    [​IMG]

    I usually did uphill moderately, without engaging WOT mode, but on one hill I tried to push the car over the limit: Flat out the car was using both ICE and Battery, draining SOC at an alarming rate. I reached the top of the hill with SOC at 29%: Here's a picture taken with SOC at 1 bar:
    [​IMG]

    Please note that the picture was taken on the downhill, and I was not accelerating. Nevertheless ICE was ON and draining 2,2 l*100 km (106 mpg) to charge the battery.

    Finally, end of the trip, just outside the motorway:
    [​IMG]

    7,0 l*100 (33.6 mpg) is the average of the whole trip, and you can also notice the 5 minute average in keeping top speed. The last bar with 150W recharged is when I slew down to exit the motorway.


    Let's hear your comments!
     
    #1 The Tramp, May 15, 2008
    2 people like this.
  2. TonyPSchaefer

    TonyPSchaefer Your Friendly Moderator
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    I don't know if I believe you.
    In fact, I'm on my way to Germany right now to test this for myself. :car:

    Seriously though. That's really cool to be able to put the Prius through the ringer like that. Did you get to pass anyone who looked shocked that they were being passed by a hybrid?
    Thanks for the pictures. I can't believe your girlfriend was snapping pictures. If my wife were to let me drive that fast - she would never - she would be huddled in a ball in the passenger seat. :eek:
     
    #2 TonyPSchaefer, May 15, 2008
  3. hiremichaelreid

    hiremichaelreid New Member

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    So you were getting 7-9 L / 100km while driving over 100 mph ?

    Seems pretty good to me for that speed. My 4000 lb car gets about 12.5L / 100km and thats keeping it to a max of about 80 mph. Perhaps it'd be about 20L / 100km at 100 mph or about 2 1/2 times your Prius.

    What's your tire pressure ? Did the handling seem OK at 100+ mph ? My 4000 lb car (Stealth TT/AWD) can do 162 mph stock; I 've had it up to 140 mph or so and it was rock solid at that speed, but I presume the 245/45ZR performance tires helped a bunch.
     
    #3 hiremichaelreid, May 15, 2008
  4. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Excellent!

    Your mileage is roughly in ratio to the lower drag to what I got with my 2003, NHW11 mileage at 160 km/hr (100 mph):
    [​IMG]
    I would have gotten more data but I was running out of 'test track.'

    24/27 ~= .26/.29 (reported coefficients of drag, assume same cross section)

    Bob Wilson
     
    #4 bwilson4web, May 15, 2008
  5. N3FOL

    N3FOL Member

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    I'll be so scared to hit 100 mph on my Prius. Honestly, I don't want to see my engine blow up in front of my eyes. At 100 mph, I'd rather be in a Porsche.
     
    #5 N3FOL, May 15, 2008
  6. JimboK

    JimboK One owner, low mileage

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    Your numbers are remarkably close to those predicted by the Prius MPG Simulator. At 106 MPH (the highest setting), it predicts 27.5 MPG. Your average speed was 94 MPH (based on a 4-hour trip), at which the simulator predicts 33.7 MPG.

    These assume outside air temp of 70F/21C, no winds, smooth dry pavement, no use of climate control, a 200#/91 kg load (occupant and cargo), and Goodyear Integritys inflated to 44/42 PSI. It also assumes level terrain, although according to a topo map you had about 400'/122 meters of net elevation gain. Makes me think you might have had a slight tail wind. A tail wind as light as 5 MPH would give you another 2 MPG at 106 MPH.
     
    #6 JimboK, May 15, 2008
  7. drees

    drees Senior Member

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    The Prius has impressive fuel economy at those speeds. I think the only type of vehicle that could match it would be diesels, but only while emitting far more pollutants.

    What's embarrassing is that the Prius at top speed matches the fuel economy of my other car (Subaru Impreza WRX) at normal speeds. At 100mph+ my Subaru would likely be averaging well under 20mpg.
     
    #7 drees, May 15, 2008
  8. The Tramp

    The Tramp Italian Prius Expert

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    You are not obliged! :rolleyes: when you finish, do pop by in Turin and we'll chat over your findings. ;)

    Actually, no: Most people drive FAST. I overtook a Prius (the only one) at 90 mph. And free the fast lane that BMWs ane Mercs zip past at over 130.

    Before taking off, I asked her opinion, and she said - Go for it! :D (I know you will not believe me) most of the time she was working off on the computer.


    3.2 front, 3.0 rear (BAR) Michelin Sport premacy (OEM) 195/55R16 with 10% left still.

    I can't afford a Porsche. :D The engine does scream until you reach top speed, thet the limiter kicks in, the revs settle to 4500 (4000 if you are tailgating) and mileage goes up!

    Yes, I did have a slight tail wind on fractions of the 600 km journey. But I also had hills to conquer, some were serious! Only after Frankfurt The road was flat and free to go flat out constantly.

    I'm not too sure. My father previous car (before HIS Prius :D) was a VW Jetta 1.9 TDI 115 Hp. at 100 spot on it did 10 l*100 km (23.5 mpg). I did 27 mpg at 108!
     
    #8 The Tramp, May 15, 2008
  9. Sheepdog

    Sheepdog C'Mere Sheepie!

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    I dont think I ever need to do 108 in a Prius or any other car thank you. Im not wild about 70 even! Im getting old I guess.

    You young folks enjoy it however! When I was young (sigh) I got my orange superbird (1970) to over 160 before a trooper found me and spoiled my day. man did he ever! If I had not been in uniform I might still be in that jail!!
     
    #9 Sheepdog, May 15, 2008
  10. That_Prius_Car

    That_Prius_Car Austin Kinser

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    I did 108 for like 7 miles, and actually got 30.5mpg! The Prius is smooth at those speeds too!
     
    #10 That_Prius_Car, Oct 11, 2009
  11. Son of Gloin

    Son of Gloin Active Member

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    I've been in Germany and, while on a trip from Flensburg to Kiel, was astonished that my friend, driving his Mazda 626 (?) at a fairly steady 165-180 kph, was occasionally having to pull over to let yet FASTER drivers get by!

    The fastest we've had Mithril going so far is about 88mph; that was on a slight downhill while passing an 18-wheeler on a VERY gusty day. I didn't want to waste any time getting around that rig!

    And ... if I ever have to go 100 mph or faster, I'd rather be in a plane!
     
    #11 Son of Gloin, Oct 15, 2009
  12. jgod12

    jgod12 Junior Member

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    Does this overheat and hurt the traction battery going 108mph? Just wondering.
     
    #12 jgod12, Oct 16, 2009
  13. drees

    drees Senior Member

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    No. You can run at top speed until you run out of gas without hurting anything.
     
    #13 drees, Oct 16, 2009
  14. patsparks

    patsparks An Aussie perspective

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    Wont happen, the Prius engine is limited to about 1000RPM less that the Yaris engine which shares the same internal components, there is a lot of margin for the engine at 100mph.
     
    #14 patsparks, Oct 16, 2009
  15. pakitt

    pakitt Senior Member

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    #15 pakitt, Jan 17, 2010
  16. William Tell

    William Tell New Member

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    Top Gear did this "test". Drove the Prius full out for 10 laps against a BMW M3 and the M3 used less fuel.

    [ame=http://videos.streetfire.net/video/143-Top-Gear-Toyota-Prius_180378.htm]143 Top Gear - Toyota Prius BMW M3 Fuel - Car Videos on StreetFire[/ame]
     
    #16 William Tell, Jan 22, 2010
  17. usbseawolf2000

    usbseawolf2000 HSD PhD

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    It can be driven so that Prius use 1/10th the fuel than the M5 on the same course.

    It is not only the driver but also the car.
     
    #17 usbseawolf2000, Jan 22, 2010
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