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Old 07-25-2009, 12:19 AM   #1
thebarber
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most mpg difference between the echo and yaris will be due to engine tuning, gearing, rolling tire diameter, and the aerodynamics of the yaris vs the echo (i think the yaris has a lower coefficient of drag)
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Old 07-25-2009, 10:05 AM   #2
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Originally Posted by thebarber View Post
most mpg difference between the echo and yaris will be due to engine tuning, gearing, rolling tire diameter, and the aerodynamics of the yaris vs the echo (i think the yaris has a lower coefficient of drag)

Dont forget the Yaris is ~300 pounds heavier than an ECHO too. We need LIGHTER not HEAVIER. That Yaris is one sick pup...
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Old 07-25-2009, 12:02 PM   #3
Yaris Hilton
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Quote:
Originally Posted by thebarber View Post
most mpg difference between the echo and yaris will be due to engine tuning, gearing, rolling tire diameter, and the aerodynamics of the yaris vs the echo (i think the yaris has a lower coefficient of drag)
The important aerodynamic measure is the CD X cross sectional area. I don't know all of the numbers for the two, but the Yaris is clearly a bigger car than the Echo, as well as being heavier. I could get 3-4 MPG more out of my daughter's Echo than I can from my Yaris. (And I had more headroom.)

But as for EPA ratings, the Echo was rated by an older test method, and the Yaris under the new standards which give lower numbers across the board.
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