Early Years (1908-1914):
* Initial Model: The earliest Model Ts were relatively basic, with features like a brass radiator, acetylene headlights, and a high-tension magneto ignition system. They were also relatively expensive compared to later models.
* Refinement and Simplification: Ford continuously sought to simplify manufacturing processes. This led to gradual changes in components to make them easier and cheaper to produce. Materials were standardized, and parts became more interchangeable, contributing significantly to mass production efficiency.
* Running Changes: Minor adjustments were frequent, often involving changes to specific parts like the carburetor, transmission, or ignition system to improve performance or reliability. These changes weren't always publicized.
Mid-Production Years (1914-1925):
* Electric Starting System: One of the most significant upgrades was the introduction of an electric starter in 1919. This eliminated the need for hand-cranking, a major selling point that greatly increased the car's appeal to a wider audience.
* Improved Materials and Processes: Continual refinements in the production process led to cheaper and more durable components. For example, the use of steel became more prevalent.
* Transmission Changes: Changes were made to the transmission to enhance its reliability and smoother operation.
* Body Styles: While initially offered only as a touring car, additional body styles like coupes and trucks were gradually introduced to cater to diverse needs.
Later Years (1925-1927):
* Model T "Re-design": While not a radical overhaul, towards the end of production, some changes were more noticeable. The radiator was redesigned, and other aesthetic changes were made. These changes aimed to modernize the look somewhat, as competitors were offering more stylish designs.
* Final Years: By this time, the Model T was becoming increasingly outdated compared to the more modern offerings from competitors. Ford, realizing the need for a successor, was already working on the Model A. The final Model Ts were still essentially the same underlying design but had absorbed a generation's worth of smaller improvements.
Key Point: It's important to remember that most changes were evolutionary rather than revolutionary. The basic design of the Model T remained remarkably consistent for its entire 19-year production run. The genius of Henry Ford lay not just in the car itself, but in the continuous refinement of the production process, allowing him to consistently improve the car while simultaneously lowering its cost and increasing its accessibility.