Hybrid Car – More Fun with Less Gas

Factors in Prius MPG?

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Posted by perfb@yahoo.com on August 14, 2006, 6:28 pm

looking for links to info on breakdown of car design factors re how
they contribute to the differential in mileage rating re regular car,

compare the 'base' gasoline Camry mileage (~25 mpg?) to the Prius (~45
mpg?), assume the difference is ~20mpg, what factors account for this
~20mpg difference, and what is their relative contribution?

gas engine running at optimum rpm when on: 30%?
aerodynamic profile: 20%?
vehicle weight:  10%?
tire rolling resistance: 10%?
braking regeneration: 10%?
gas engine small displacement: 10%?
gas engine off when idle: 10%?
other factors???

would appreciate any links to websites that do an analysis of these
design factors, tia!

Posted by NeoPhyte_Rep on August 15, 2006, 12:27 am

perfb@yahoo.com wrote:

If you want to eliminate aerodynamics as a factor, you could compare the
gasoline only Camry with the hybrid Camry, or the Highlanders or the
RX3?0 and RX400h.  There is zero difference in those pairs.

Posted by OscartheGrouch on August 16, 2006, 7:29 pm

I'm not aware of any websites that analyze these factors in the Prius. Seems
like something like it should exist.....

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