Those static hazards are 16x16 pixels. The collision check is only an 8x8 box bottom centre of the item.
Here's the comparison between two games: original Automania is above, Automania Refurbished is below. In both cases, Wally's next step will lead to his death. Note that in the top version, Wally has passed exactly half of the BP canister, while in the bottom version, he's passed at most a third. Clearly, in the original game, Wally dies when he passes half the hazard, while in your version, it's about 1/3. This makes the collision detection feel much stricter.
