The Ford Model T was an early automobile created by the Ford Motor Company in Earth's early 20th Century.
It was the predecessor of the Ford Model A and was considered the first production model automobile of the 20th Century.
When Berlinghoff Rasmussen compared Data to the Model T, he corrected the Professor and told him that the Model A might be a more apt analogy since he was Noonien Soong's revised prototype. (TNG: "A Matter of Time")