Ford Model T Tourer '15

The Ford Model T Tourer is a 1915 car which is featured only in Gran Turismo 4. It is commonly considered the first affordable car ever built, and has been voted the most influential car of the 20th century. Over 15 million were made.

Gran Turismo 4
The Model T is one of the hardest cars to win in GT4. It is the prize for achieving gold on all Super License tests.

Trivia
An unused string of text in GTPSP suggest that this car was originally planned to make an appearance in GTPSP, together with the Audi Auto Union V16 Type C Streamline '37, the Hyundai Click Type-R '04 and the Mazda MX-5 '05. All of these cars, which the exception of the Mazda MX-5 '05, have made an appearance in Gran Turismo 4.