1975 Rolls Royce Silver Shadow 6.8L Petrol · BOX 1A

A hydraulic fluid leak from the offside rear, paired with a separate engine oil leak, defines the mechanical narrative of this Silver Shadow, with both items recorded as advisories rather than failures at the most recent MOT on 2 October 2025. The fact that the vehicle passed despite these issues indicates the leaks are not yet severe enough to constitute a test failure, but their presence is consistent with the realities of owning a fifty-one-year-old hydraulic system. On a Rolls-Royce of this era, the hydraulic circuit serves multiple functions including brake operation, and any seepage flagged by the tester warrants close scrutiny. The absence of previous MOT entries on the supplied record means this is effectively the first documented test result, so it is too early to determine whether these advisories represent a developing trend or isolated seepage. With 34,791 miles recorded over approximately fifty-one years, the annual accumulation works out at around 682 miles per year, which is exceptionally low even by the standards of a luxury saloon of this period. Such modest usage typically results in less wear on the drivetrain, clutches, and braking surfaces, but it places considerable stress on systems that deteriorate through standing rather than use. Hydraulic seals, flexible brake hoses, rubber gaiters, and various greases and oils become more prone to leaks when vehicles remain stationary for prolonged periods. Cold starts after long lay-ups can also highlight pre-existing weaknesses in engine seals and gaskets, which may explain why both the hydraulic and engine oil leaks have surfaced together. The implication is that this car has likely seen extended periods of inactivity, and components designed for regular circulation may now be showing their age. From a buyer's perspective, the priority checks begin with the hydraulic system, as the recorded nearside rear hydraulic leak sits within a network that operates brake assistance and may serve suspension height control on certain variants. On inspection, look for dampness or staining around the hydraulic accumulators, pump reservoir, and rear brake calliper area, and listen during startup for any undue whining or hesitation from the hydraulic pump as it builds pressure. Anhydrous fluid condition should be assessed, as discoloured or aerated fluid points to internal seal degradation. Under the vehicle, an oily residue along the underside of the engine and gearbox bellhousing should be expected, given the recorded oil leak, so the key distinction is whether active dripping is present or whether the seepage has stabilised as a historical stain. During a test drive, focus on brake pedal firmness and travel, as any sponginess or gradual pedal fade under repeated application would suggest hydraulic fluid loss or air ingress within the system, which directly relates to the advisory recorded. Listen for clonks or rattles over uneven surfaces, particularly from the rear suspension, where perished bushes or seized shock absorbers commonly develop on low-mileage cars that have stood for long periods. Steering should feel precise and free of vagueness, while the engine should pull cleanly without excessive smoke from start-up or under load, both of which would indicate seal deterioration aggravated by infrequent use. Given the age of the vehicle and the advisory items already documented, a pre-purchase inspection by a specialist familiar with Rolls-Royce hydraulics would be strongly advisable before committing to purchase.