Modern coils are really low resistance, "A typical value would read 0.4 - 2 ohms." from - https://help.summitracing.com/app/answers/detail/a_id/5098/~/ignition-coil-primary-resistanceYes - I did mean Vce(sat) - 1.8V is a lot to lose from a 12V supply - it only leaves 10.2V across the coil, but if the series resistance of the coil is much lower it won't be the limiting factor.
All of the online answers agree with those numbers.