Riley 4

Brake fluid capacity & service interval

Riley 4 uses brake fluid with a capacity range of min to max. Service intervals occur every 1500 km. The data covers 2 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
4/72 (1961-1969)
  • Use: Normal
  • Between min and max.
  • Check 1500 km
4/68 (1959-1961)
  • Use: Normal
  • Between min and max.
  • Check 1500 km

Additional Notes

  • The Riley 4 brake fluid specification applies to a hydraulic brake system across both the 4/68 and 4/72 variants, with the reservoir level maintained between the minimum and maximum marks rather than filled to a fixed volume.
  • The 4/68, produced from 1959-1961, and the 4/72, produced from 1961-1969, share an identical check interval of every 1,500 km under normal use conditions.
  • A min-to-max fill range, rather than a precise capacity figure in liters or milliliters, reflects a top-up and inspection approach rather than a full system overhaul quantity.

Other Systems