I thought it would be a simple matter of having AI generate the visualization, but Bing refuses to draw what I describe, no matter how I modify the description of "12 horses pulling a Chevy Bolt". No matter what I say, it shows the car pulling the horses. This is the closest AI could get to what I described.
Here's what I get when I ask for 20 horsepower to be represented by horses
At this point, I think the visualization has to be greatly simplified, where the vehicle and horses are simple stick figures drawn horizontally such that the length is representative of a power graph.