The vehicles do decrease in cost, however, it is a static amount. So yes, what you're seeing is a mistake. I need to take in consideration the new cost of the engines/chassis/gearboxes when decreasing the vehicle cost.
I don't take into account of the year in cost decreasing due to the fact that the design remains the same. So modifying your vehicle makes it a new design, thus when they're building the vehicle they take into account new tools/methods. Vehicles also decrease in cost based on how many you have built. I don't remember the exact amount it decreases but it's something like 1000 cars * 1.02^(year-1899)... it's half a percent per turn if you build this many in a turn....
I don't take into account of the year in cost decreasing due to the fact that the design remains the same. So modifying your vehicle makes it a new design, thus when they're building the vehicle they take into account new tools/methods. Vehicles also decrease in cost based on how many you have built. I don't remember the exact amount it decreases but it's something like 1000 cars * 1.02^(year-1899)... it's half a percent per turn if you build this many in a turn....
"great writers are indecent people, they live unfairly, saving the best part for paper.
good human beings save the world, so that bastards like me can keep creating art, become immortal.
if you read this after I am dead it means I made it." ― Charles Bukowski
good human beings save the world, so that bastards like me can keep creating art, become immortal.
if you read this after I am dead it means I made it." ― Charles Bukowski