I'd never seen an Impala,
   until one day I did.
 Except an eighty-five Chevy,
   back when I was a kid. 

The Chevy was not lean, nor quick,
   as real Impalas are.
 Had this bovid ever been seen
   by the namer of cars?

I tried to see commonality:
   one was made and one born,
 One was clunky and unagile,
   but both came standard with horn.