Goldtop

Goldtop is a failed Autobot from the Robo-Capers portion of the Generation 1 continuity family.

The egotistical Goldtop transforms into a milk float.

Fiction

Goldtop was let go by the Autobots due to his cowardice. Robo-Capers issue 97

For those not familiar with the concept, a milk float is an electric vehicle used to deliver milk in the United Kingdom. Though relatively common in the '80s, they are much rarer today.
"Goldtop" is a popular name for milk produced in the Channel Islands, so called because it comes in a bottle with a gold top. It is creamier than regular milk.