Acceleration is work over time, driving down the street is work over time, moving a fraction of a mm is work over time, hp is work over time and what's hp tq and rpm.
Gearing is to put you at the engine rpm at the hp that's needed to do the work. Why people like diesel for work vehicles is peak hp is at very low rpms at operation speed like road speed for trucks your basically able to use peak hp anytime you want, with most gas engines your gonna have down shift and drive down the road at 4000+ rpm to access peak power. In a drag car you gear to so you spend your time between stall to shift points. Rock crawler gear yo spin around peak hp at walking speeds etc...