If the train don't have to wait for first load, the calculation is as follow, if it have to wait just add 20 sec to all results.
Falcon will deliver 28t wait for 120 sec and drive 26 km, that totals 1.051,666 sec,
Boar will deliver 25t wait for 80 sec and drive 18 km, that totals 1.168,180 sec,
Rhinoceros will deliver 27t wait for 160 sec and drive 34 km, that totals 1.170,607 sec,
Result: I'll pick the Falcon.
Michael Kirch Thomsen
aka: Hobbyisten, Comm 202, Loch Ness