|
If you can coast down the hill, that route will probably be more efficient.
You'll load the engine more on the climb, moving it into a better area of its brake specific fuel consumption (BSFC) map, then use next to nothing while idling in neutral on the way down the other side.
Edit: one of the first Prius owners I knew did a similar comparison. He used less fuel overall on his "1 hill" route vs. the "flat route".
Edit 2: similarly, he found that on a route with a steep up & gentle decline, he used less fuel driving in one direction than the other. You can figure out which.
|