250km/h for 2 hours on a 70 litre diesel tank in a BMW 535 would require > 73% efficiency of the engine, which car engines don't reach.
Calculations assume:
Coefficient of rolling resistanc) = 0.01
Mass = 1700kg
Coefficient of drag = 0.25
Frontal area = 2.2 m^2
...and those numbers are on the kind side to the car.
On the other hand, 150km/h would require < 20% efficiency to last 2 hours.
Writing calculations is a bit tiresome, so I'm not going to worry about it unless/until someone provides some calculations producing significantly different numbers.
250km/h for 2 hours on a 70 litre diesel tank in a BMW 535 would require > 73% efficiency of the engine, which car engines don't reach.
Calculations assume: Coefficient of rolling resistanc) = 0.01 Mass = 1700kg Coefficient of drag = 0.25 Frontal area = 2.2 m^2
...and those numbers are on the kind side to the car.
On the other hand, 150km/h would require < 20% efficiency to last 2 hours.
Writing calculations is a bit tiresome, so I'm not going to worry about it unless/until someone provides some calculations producing significantly different numbers.