[rbanffy]

Most likely step motors in the instruments. I am sure there is no analog voltage or pneumatic input to the dashboard.

[formerly_proven]

Neither was there in cars with dials 30 years ago.

[imglorp]

The speedometer and odometer at least could be fully mechanical: they used to be gear reduced from a cable to the wheels or transmission.

[formerly_proven]

That's the point, they could've hypothetically been analog but even in a 30 year old car they most likely weren't.