I have put together two speed vs. rpm graphs.
One shows standard gear ratios of a 131 and one showing close ratio gearbox as used in 131 Abarth.
Both calculations were made based on a 7:43 diff.
Look, what a difference a competition gearbox can make!
It looks like making the engine 180+ bhp is just the beginning of hard decisions and spending ... it really requires more! The diff and gearbox seem to be key.
Miro
Fiat Abarth 131 - Gearbox ratio difference
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Fiat Abarth 131 - Gearbox ratio difference
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