What year and model Alfa?
Only 10.9 volts at the coil indicates that either there's a ballast resistor somewhere, excessive circuit resistance or a flat battery.
By 'Power drop at crank is 8.5 volts' do you mean the voltage at the coil during cranking is only 8.5V?
Only 10.9 volts at the coil indicates that either there's a ballast resistor somewhere, excessive circuit resistance or a flat battery.
By 'Power drop at crank is 8.5 volts' do you mean the voltage at the coil during cranking is only 8.5V?