Comparative Steady State Higher Speed Fuel Economies from 50 to 120+ mph where possible
Thought some of you might be interested.
The graph reflects selected steady state fuel economies in mpg increments for the Prius, Mercedes C 180K plus gasoline-diesel pairs of the BMW 535 Touring, Opel Zafira, and the VW Golf.
Take special notice of the spreads between the gasoline and diesel versions of the pairs. You may also find the variations in slopes of interest.
Sorry about the graph size, I did not know how to make it larger.