What factors affect fuel consumption and speed in road vehicles?

[dean barry]

I was wondering about the amount of fuel used for a given journey.
My model is that the same journey is made at two different constant speeds
I have assumed that instantaneous fuel consumption is proportional to the power produced by the engine at that point.
I an ignoring rolling resistance losses, and considering air drag only.
I have used power * time as a base for total amount of fuel used for each journey
Any comments ?

 

[Nidum]

http://www.mpgforspeed.com/

If you want to study this subject in detail read :

Road Vehicle Performance: Methods of Measurement and Calculation
By George Gordon Lucas
There are several volumes . You only need volume 7 .

https://books.google.co.uk/books?id...easurement and Calculation lucas vol7&f=false