Fuel consumption..a comparison

[Dave Hall]

I`ve just done a 3k journey in the company of a Boxer Cup. He has an 18 litre tank so I assumed I`d be topping up my 2001 1150GS whilst he filled up at fuel stops.
He consistently used 10% less fuel than me (we were both 2 up with luggage) which meant we had about the same range. He was rarely more than 12" from my back wheel so riding style could`nt account for it.
I`m curious as to why an 1100S should be so frugal with the fuel?

 

[Fanum]

Aerodynamics???

 

[CoolCarbon]

Better aero-whatsits and slip-streaming.............

CC

 

[Dave Hall]

Aerodynamics???

Are you saying I`m a wind dam!.

You might be right...but 10%.

 

[Fanum]

yeah easy........the boxer cup is designed for racing obviously, so it's meant to be aerodynamic...the GS is designed to scare old ladies and cuts through the air like a brick......

You may even find the Drag coefficient for the two listed somewhere.......that might be interesting.

 

[malc]

50 R uses less than GS

Me & daddy did a 1500m tour of the west coast of scotland in may this year Ive got an 02 1150R & dad has a 52 1150GS & at every fill up he put in over £3 more per tank than me yes we filled up at the same times & same petrol same distance between fill ups & both fully loaded so ive no idea.
???????????
I would have thought they would use the same amount

 

[Dave Hall]

I`ve checked BMWs website and their consumption figures for 100km @ 120km/hour are:

1150R 5.71
1150GS 5.71
Boxer cup 5.01

That explains it then.

 

[adamski49]

I think it's simpler than aerodynamics in that the S is geared higher than the GS so for the same road speed the engine will be spinning slightly slower.

Adam (frugal S owner)

 

[Steptoe]

after the gentle stroll on the ampshire rideout last week, very sedate through the new forest etc etc, i carried on riding like BM owner till the fuel light came on, i did 254 miles and put 19 litres of fuel in, thats around 60 per gallon, but its very very boring .

 

[Dave Hall]

i did 254 miles and put 19 litres of fuel in, thats around 60 per gallon, but its very very boring .

Do you have the standard 10% optomistic speedo (which means you did 55mpg) or the optional accurate mechanism.

 

[Steptoe]

Optomistic setup, which means as well as only 55mpg, i was driving at the sedately speed of 34mph.

that must make me a commitee member of the BMoaners club.

 

[iletts]

after the gentle stroll on the ampshire rideout last week, very sedate through the new forest etc etc, i carried on riding like BM owner till the fuel light came on, i did 254 miles and put 19 litres of fuel in, thats around 60 per gallon, but its very very boring .

you city boys should be grateful to see the country now and again,

what about a rideout round smoke??

i might regret this