Skip to content
8–23 August: reduced summer staffing. Orders may take up to 5 extra working days to dispatch and emails up to 2 working days to answer. Thanks for your patience.
8–23 Aug: orders may ship up to 5 days later.
Search parts
RTC5092LR - Vacuum Advance by Land RoverElectrical Part Land Rover Range Rover Defender, Discovery, Range Rover

RTC5092LR - Vacuum Advance

- €190,00
€190,00
€190,00 - €190,00
€190,00
Genuine Part
Genuine: Original manufacturer part. This product is the original part designed and produced by the vehicle manufacturer.
Vacuum Advance Unit for the ignition distributor on the 3.5L V8 petrol engine.

This vacuum capsule mounts on the side of the distributor and connects by a small pipe to a vacuum take-off at the carburettor or inlet manifold. Under light load, vacuum draws the diaphragm against its spring and the linkage rotates the distributor pick-up base plate to advance the ignition timing, improving part-throttle efficiency; as load increases and vacuum falls the timing returns.

A ruptured diaphragm or seized linkage shows up as poor part-throttle running, pinking, or loss of economy.
Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Range Rover Classic 1994-2001 (P38)
Fitment Notes DEFENDER 1987-2006 — Distributor SU, 3.5L V8 Twin Carb Petrol
DISCOVERY 1 1989-1998 — Distributor, 3.5L V8 Twin Carb Petrol
RANGE ROVER CLASSIC 1986-1994 — Distributor, V8 Petrol (Carb & EFI)
Alternative Codes
RTC5092RTC5092LR

In stock 3 units
3 · Gouda 0 · Drachten
Express delivery available

When will my order arrive?
  • Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
  • UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
  • Netherlands / Belgium / Germany: 2–4 working days.
  • Other EU countries + UK: 4–8 working days.
  • Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the vacuum advance unit do?
The vacuum advance unit is the capsule on the side of the ignition distributor that advances timing under light load. Manifold or carburettor vacuum draws its diaphragm against a spring, rotating the pick-up base plate to advance the spark for better part-throttle efficiency; as load rises and vacuum falls, timing returns. It's fitted to the 3.5L V8.
What are the symptoms of a failed vacuum advance?
A ruptured diaphragm or seized linkage typically shows as poor part-throttle running, pinking, or loss of economy on the V8. You can check it by applying vacuum to the capsule and watching whether the base plate moves and holds. A capsule that won't hold vacuum needs renewing.
Which Land Rover V8s does this vacuum advance fit?
This vacuum advance fits the 3.5L V8 twin carb Defender, Discovery 1 (FA393361 to WA799999) and Range Rover Classic. On the Range Rover Classic it covers twin carb and EFI to VIN HA610293, and EFI from JA610294. Confirm your distributor type and VIN before ordering.

Alternative & Related Options

Same part, different brands or quality grades. Click any option to view full details.

1 option
RTC5092 - Vacuum Advance
Aftermarket RTC5092 - Vacuum Advance
Stock 2
€91,50 excl. VAT
View →