100 cars built per year in the 1970s/1980s is VERY pessimistic indeed. In those days the production was slightly above the 400 mark.
The 100 cars per year might be the number of cars sold to Germany in those days.
Hermen
There are well documented sources which show that in 1971-1972 the build process for a car was approximately 3 months. In September of 1972, when Peter Morgan acquired an extra 12,000 feet of factory floor space, he hoped that this would allow him to increase production to about 750 cars a year.
However, principally because the cars were becoming more complicated, this scale of increase was never realised and figures for that period ( such as 1976-77) show that some dealers were quoting customers a ten year delay between placing an order and having the car delivered
G