Quote:
Originally Posted by tjts1
. . .If you are just interested in fuel economy then get the 4 cyl diesel with 116hp. . . .
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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