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Questions about 04/05 powertrain versus 06 and up

Discussion in 'Gen 2 Prius Technical Discussion' started by roflwaffle, Jun 28, 2012.

  1. roflwaffle

    roflwaffle Member

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    I recently test drove an 04 Prius the other day and it seems like the inverter whine was really load compared to my friend's 06. Is this a function of it being an earlier design, or can that indicate transmission problems. It also seemed like the engine would rev a bit higher when accelerating, almost like an automatic that was slipping more, compared to my friend's 06, which seems to be better at keeping engine speed down.
     
    #1 roflwaffle, Jun 28, 2012
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

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    I own a 2004 and 2007, and have not noticed any driveability differences as you describe. I am wondering whether the 2004 that you test drove has all of the firmware changes issued for the hybrid vehicle and engine ECUs.
     
    #2 Patrick Wong, Jun 28, 2012
  3. roflwaffle

    roflwaffle Member

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    It might not, although the owner claimed to have comprehensive service records. I wish I had thumbed through them, but if I see similar behavior later I can always look at what the PO has done.
     
    #3 roflwaffle, Jun 29, 2012
  4. bisco

    bisco cookie crumbler

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    i had an 04 and an 08 and they were virtually identical. although, i always felt the 08 had about 5-10% better mpg's. just anecdotal experience tho. as for as sounds, no difference.
     
    #4 bisco, Jun 29, 2012
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