RTC5092 - Vacuum Advance
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.
Land Rover Discovery 1 1989-1998 (L318)
Range Rover Classic up to 1994
Range Rover Classic 1994-2001 (P38)
DISCOVERY 1 1989-1998 — Distributor vacuum advance capsule, 3.5L V8 Twin Carb Petrol
RANGE ROVER CLASSIC 1986-1994 — Distributor vacuum advance capsule, V8 Petrol (Twin Carb & EFI)
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.