A car can outrun everything.
Getting a car dramatically increases your options, and allows you to pick your fights more often.
For running on foot, run through houses, start fires to destroy your scent, and the fire also can destroy things, which slows down a persuer and might even kill them.
cocaine and other stimulants makes you run faster, as does not being hot/cold/inpain/tired/hungry/thirsty. Your body is a machine, and needs to be cared for like one.
Lower legs, mouth, and foot encumbrance makes you run faster. Its only a few movement points per step, but when you run 250 steps sprinting away from an enemy those 2-6 movement points count. They become 200-800 movement points.
Finally, know what your enemy can see. Not everything can see as far as you; in fact most cannot see as far as you. The excplaimation point next to their name when you press [shift v] will indicate if they can see you.
And, just for knowledge, you can typically sprint the equivalent of 115-120 speed. Maybe more or less depending on the conditions. 100 is your walking speed.
So a monster with 145 speed is going to outrun you.