The Natural Philosopher wrote:

The Other Mike wrote:

Rev counters and indeed most dash gauges including speedos
nowadays are either driven by stepper motor or are a visual widget
on an LCD display.

No, They are normally analogue millammeters.
Driven by the cars computer systems.

Mine (7 years old) certainly is a stepper-motor, the speedo and rev
needles do a precise 'sweep' as part of the lamp check sequence when
turning the ignition on.