Showing specs for all NA & NB Miatas

Cylinder compression — standard (NA8)

1,182 psi (255 kPa; 12.8 kgf/cm²) at 300 rpm1,255 kPa {12.8 kgf/cm², 182 psi} at 300 rpm

Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure

Fully charged battery; warm engine to normal operating temperature, then turn off. Remove all spark plugs, disconnect ignition-coil connector, connect compression gauge and crank with accelerator fully depressed. Record maximum reading at 300 rpm for each cylinder.

Applies to
  • NA 1994–1997 (BP) — Other years inferred from 1994 factory evidence.
  • Verified in: 1994 Mazda MX-5 Miata Workshop Manual