I've always been lead to believe a GA 360 was 1.0 m/s2. So hold on tight if a driver gives a 755 full welly from a standing start.
just done some rough calculations for mpg for the 755/3's.Please bear in mind this is by no means accurate and there's lots of assumptions in here.
Very likely slightly better for 755 as It won't be at full throttle as long as 15x to get up to line speed,or will take lower throttle setting, so duty cycle figure should reduce correspondingly.
according to deutz website the V8 gives fuel consumption of 194g/KWh, so at full whack 480KW will give a figure of 79L/h approx(or 17.4gallon/h)
multiply by 2 for extra engine (then divide by 2 for rough 50% duty cycle)- these cancel out.
now add in a typical rural diagram like norwich to sheringham- say 50miles.
this gives 2.87mpg!! shocking!!!!
compare to sprinters- i found some data for cl158(350HP/260kw) . uses 222g/KWh- 49L/H =4.63MPG
extrapolate to cl150/156(285hp/212KW) =40L/H= 5.67mpg