If Transformers came out in the 1800s, Bumblebee would become a velocipede, Megatron would turn into General Custer's mustache, and Optimus Prime would transform into a stately locomotive. Check out this anthracite-fueled Optimus by Encline Designs.

Also, the 19th-century version of Transformers would have to be a theatrical performance, fraught with an exploding set and hapless actors fleeing for their lives wearing nothing but painted turnip crates. Michael Bay would have to become a fireworks magnate just to fund a single performance, and Starscream would be played by a duplicitous cotton gin.

[Encline Designs via Rampaged Reality]

This steampunk Optimus Prime runs on coal

This steampunk Optimus Prime runs on coal

This steampunk Optimus Prime runs on coal

This steampunk Optimus Prime runs on coal

This steampunk Optimus Prime runs on coal