I want a kit for this engine and I want it NOW !!
Seriously though, what a cracking image. Sadly, I can't find our where it came from originally but I did find a story that uses it for illustration. You can read it here.
If you are just wondering, "What the hell is STEAMPUNK ?" then you can find your answer here.
Update: Thanks to Jerm for the info that this was the cover to the computer game Transarctica and painted by Rodney Matthews. The title of the original work is Heavy Metal Hero