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Old 07-17-2009, 03:19 PM   #6 (permalink)
bwilson4web
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Join Date: Mar 2009
Location: Huntsville, AL
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17 i3-REx - '14 BMW i3-REx
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Quote:
Originally Posted by tjts1 View Post
. . .If you are just interested in fuel economy then get the 4 cyl diesel with 116hp. . . .
The vehicle efficiency model works the same regardless of the engine size. Although the larger engine is likely to have greater internal drag and require more than 5 hp (3.7 kW) for internal engine operating losses, it still has to turn to maintain 30 mph and generate the fixed internal energy losses as well as the 5 hp needed to sustain 30 mph.

Bob Wilson
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2019 Tesla Model 3 Std. Range Plus - 215 mi EV
2017 BMW i3-REx - 106 mi EV, 88 mi mid-grade
Retired engineer, Huntsville, AL
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