25mpg is the stated electric range?Good guess, but that's not it. The deal was announced on March 10, 1987, and completed on August 6, 1987. Can't figure out what would've happened on May 25. With Jeep's love of putting Easter Eggs on the Wrangler, I have to believe it means something.
Then again, it could just be something random. Like the birthdate of one of the kids of an engineer or someone working in the ad department.