Riley 4

Manual transmission fluid capacity & service interval

Riley 4 manual transmission fluid capacity is 2,56 liters. Service intervals include checks at 1500 km and changes at 800 km or 9000 km. The data covers 3 configurations.

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

TypeSpecifications
4/72 (1961-1969)
  • Use: Normal
  • Capacity 2,56 liter
  • Check 1500 km
  • Change 9000 km
  • Code: 4/1
4/72 (1961-1969)
  • Use: Initial service
  • Capacity 2,56 liter
  • Change 800 km
  • Code: 4/1
4/68 (1959-1961)
  • Use: Normal
  • Capacity 2,56 liter
  • Check 1500 km
  • Change 9000 km
  • Code: 4/1

Additional Notes

  • The Riley 4 manual transmission holds 2.56 liters across both the 4/68 and 4/72 variants, a figure that represents a service fill rather than a full overhaul capacity, meaning the gearbox is not completely drained during a standard fluid change.
  • Under normal use conditions, the 4/68 (1959-1961) calls for a fluid check every 1,500 km, reflecting how frequently fluid level verification was expected during routine ownership in period service schedules.
  • The normal-use change interval for the 4/68 is set at 9,000 km, a relatively short drain cycle by modern standards, consistent with the lower additive technology available in transmission lubricants of that era.
  • The 4/72 (1961-1969) shares the identical 2.56-liter capacity and the same 1,500 km check and 9,000 km change intervals under normal use as the earlier 4/68, indicating no revision to the transmission fluid service requirements between the two variants.
  • An initial service entry exists specifically for the 4/72, specifying a fluid change at just 800 km, a break-in drain intended to remove metal particles and manufacturing residues that accumulate during the earliest stage of gearbox operation.
  • The 800 km initial service interval on the 4/72 applies at the same 2.56-liter capacity as subsequent normal-use changes, meaning the volume of fluid involved in the break-in drain is no different from a standard service fill.

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