If interested around 1996 FHW put together a chart to show the number of automobiles that were registered (listed) as on the road between 1900 to 1995.
Between 1908 (194,400) and 1927 (20,193,333) automobile were registered.
Interesting table of statistics, George. Thanks for the link.
This brings up a question - we know the approximate number of Model Ts made is just over 15 million - but that was world-wide, correct ? How many "lived" in the USA ?
I've heard it said many times that in the Model T era, and well into the Model A years and later, half of all the cars on American roads were . . . Fords. If that is true, then of 20 million plus cars on the road in 1927, ten million were Model Ts !
Another question that comes to mind, I wonder if there are any statistics on the average "lifespan" of cars in those years 1908 to 1927 ? If the "half were Fords" statement is true, it would seem there was a considerable number of fairly old Model Ts in use in 1927 !
Ford didn't expect Ts to last long.
After the end of production, Ford issued a notice to customers which said that EVEN IF Model Ts last as much as 10 years, they would continue to provide spare parts.
In the UK, the number of Model T cars registered for road use halved every two years from 1927.
So 40,000 in 1927 fell to under 1000 by 1939.
The decay rate was high because some were converted to be trucks, but mainly because the large engine was taxed at a high rate - about $100/yr - double the tax on a typical English small car.