26-02-2019, 08:40 PM
Bit of an odd question. When did they start using CC (cubic centimetres) to measure engine displacement in Britain and why?
It seems odd it is in metric when everything else (bore, stroke, bearings, crank diameter, etc) was imperial (in Britain at least).
The 750 motor club was started in 1939 it seems so they were using it then at least. I am guessing it is something to do with a lot of the early cars being French and German and they used metric measures.
I was curious since I am looking at the specs for Brooklands mufflers and they mention the volume must be at least 6 times the volume of one cylinder. I am working all the dimensions out in imperial and so had to convert 750/4 into imperial too.
Simon
It seems odd it is in metric when everything else (bore, stroke, bearings, crank diameter, etc) was imperial (in Britain at least).
The 750 motor club was started in 1939 it seems so they were using it then at least. I am guessing it is something to do with a lot of the early cars being French and German and they used metric measures.
I was curious since I am looking at the specs for Brooklands mufflers and they mention the volume must be at least 6 times the volume of one cylinder. I am working all the dimensions out in imperial and so had to convert 750/4 into imperial too.
Simon