...between 120 km/h and 240 km/h wind drag is going to quadruple... Your figures here are an idealization. Real results are not going to match this because ai

...between 120 km/h and 240 km/h wind drag is going to quadruple... Your figures here are an idealization. Real results are not going to match this because air resistance and fuel consumption are not a smooth process. (Some versions of the Tesla S even have active suspension, which really makes things interesting.) I expect you'd need some pretty serious finite element modeling, and engine modeling, to really understand the linkage.