1929 Bentley 4.5 4.5L Petrol · SC 6561

A six‑year stretch of fault‑free MOTs from 2006 to 2012 is the only objective evidence of roadworthiness in the record, and each test reported no defects. That clean history suggests the basic chassis, steering, brakes and lighting systems were acceptable at the time of testing, but the absence of any MOT result after 2012 leaves the current condition entirely unverified. Prospective buyers should treat the vehicle as having an unknown present‑day mechanical state despite its historically clean MOT profile. At 5,602 mi spread over 97 years the average annual accumulation is roughly 58 mi, an exceptionally low usage rate that points to prolonged periods of inactivity. Such light mileage reduces wear on wear‑items such as brake shoes, tyres and suspension bushings, yet extended stand‑still can allow seals to dry, lubricants to settle, and rust to develop unnoticed, especially on a vehicle of this vintage. The mileage pattern also means that any future wear will be concentrated on components that have seen little service, so the first real test of condition will be a thorough operational inspection rather than a mileage‑based prognosis. When inspecting the chassis and suspension, look for any signs of corrosion around the front axle housings, rear leaf‑spring mounts and the subframe rails, as rust can progress silently on low‑use cars. Examine the condition of the suspension bushes, ball joints and steering gear for cracking, excessive play or binding when the wheels are rocked and when the steering wheel is turned at low speed. On a test drive, listen for clunks over bumps, feel for any steering pull or uneven wheel bounce, and watch for tyre sidewall cracks that may have developed despite the low mileage. The power‑train and braking system merit particular attention. Verify that the 4.5‑L straight‑six shows no oil leaks at the crankcase, valve covers or oil pump, and that the exhaust system is free of rust perforations. During a drive, note any irregular engine noises, loss of power under load, or excessive vibration that could indicate worn main bearings or compromised crankshaft balance. The braking system—originally drums or early discs—should be checked for seized or leaking wheel cylinders, uneven pad wear and a firm, non‑spongy pedal feel. Given the age and the lack of recent MOT data, a specialist classic‑car mechanical survey is strongly recommended before committing to purchase.