The leader of the Transformers' Autobots is definitely based on a flat-faced cab-over-engine semi-truck. Exactly which one, though, remains a matter of dispute.

This authentic Optimus Prime stunt truck will likely transform into big dollars at Barrett-Jackson.

Optimus Prime's red, white and blue color scheme matched the truck stop's and Optimus Prime is a truck, making it a serendipitous fit.

Hasbro and Robosen have launched a companion trailer for Optimus Prime with equally cool auto-conversion features and an equally steep $750 price.

Optimus Prime from the Transformers live-action saga just found a new home in the garage of Rick Hendrick. The owner of Hendrick Motorsports paid no less than $110,000 for the truck you can admire ...

Lego Optimus Prime Transforms From Robot to Truck, No Rebuild Required Transformers fans, roll out! Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET.

Go say whatever you want, you know we’re right: nothing says happy birthday like an animated cake that is shaped like a truck and that can transform into Optimus Prime.