The word is "rod." Usually it is used with the word "hot" to form "hot rod." Sometimes classic cars are also called "street rods"
Reo
3 letter word for old oldsmobile
"Tar" is a 3-letter word for old salt, in the nautical sense.
new
Car, Bus.
car
bus car van
old
Car, the, wow, His, Her, Him, She. Any three letter word
Old age.
Grand Cherokee
Another 3 letter word for respect is awe.