Armstrong-Siddeley Classic Cars for Sale

History of Armstrong-Siddeley

Armstrong-Siddeley emerged in 1919, a result of John Davenport Siddeley’s ambition and the merger between Siddeley-Deasy and Armstrong Whitworth. Based in Coventry, the company soon became synonymous with luxurious cars and pioneering engineering, including aircraft engines. The brand’s early cars were known for their stately appearances, advanced six-cylinder engines, and innovations such as the Wilson Preselector gearbox. Armstrong-Siddeley was tightly woven into the fabric of British industrial history, collaborating with Hawker Aircraft and eventually merging with Bristol Aeroplane Company before the automotive division was absorbed by Rolls-Royce in 1966.

Model History

The model journey began with the 30-hp straight-six in 1919, establishing a standard for stateliness. The next significant step was the 15-hp six-cylinder in 1928, bringing modern valve technology to the lineup. The 1930s were dominated by six-cylinder engines, with models like the Siddeley Special. After WWII, models were often named after aircraft, reflecting the company’s aviation heritage—examples include the Lancaster and the Hurricane. In the 1950s, the Sapphire models marked Armstrong-Siddeley’s final evolution, culminating in the Star Sapphire with an automatic gearbox in 1958.

Highlights and Popularity

Armstrong-Siddeley vehicles distinguish themselves through their silent operation, a trait symbolised by the Sphinx mascot. Technical highlights include the Wilson Preselector gearbox and the robust six-cylinder engines. Interiors typically featured high-quality materials and spacious layouts, often with bespoke features to satisfy demanding clients. Noteworthy is the Sapphire’s comfort at high cruising speeds and its association with royalty—Queen Elizabeth II drove a Sapphire privately.

According to our statistics, the Sapphire makes up 26.3% of available Armstrong-Siddeley listings but commands 38.1% of demand views. Whitley follows with 21.1% supply and 29.8% of views, indicating strong marketplace interest. The Hurricane and Star Sapphire, though less common, are also in demand among enthusiasts.

Technical Data

Special Editions and Collectible Models

Special interest surrounds the Sapphire and Star Sapphire models, notable for their refined engines and limited production numbers—particularly left-hand-drive Sapphires, produced in small quantities. The Station Coupe, tailored for the Australian market (1,022 built), stands out with its dual-cab format and utilitarian refinement. The Sports and Utility Coupes, regularly seen at historic rallies, reflect the diversity within the Armstrong-Siddeley portfolio.

Weak Spots and Common Issues

Reports highlight strong reliability and smooth operation as signature strengths. As with most vehicles of the era, attention to rust and condition of the wiring is crucial. The Wilson Preselector gearbox requires specialist knowledge for service but is generally robust if maintained properly. Mechanical components such as carburettors and the hydraulic systems benefit from regular inspection to preserve operational excellence.

Engine, Performance, Transmission and Handling

Armstrong-Siddeley cars are known for serene, vibration-free cruising at sustained speeds—the Sapphire easily maintains 70–80 mph (110–130 km/h). Some models feature twin carburettors for sharper response. The Wilson Preselector gearbox provides a distinct, almost pre-war driving experience, admired by enthusiasts for its engineering uniqueness. The chassis offers a blend of comfort and road-holding consistent with luxury aspirations.

Popular models include:

• Sapphire: 2.3/3.4/4.0-litre sixes, preselector or automatic gearbox
• Whitley: six-cylinder saloon, strong presence in supply and demand
• Hurricane: postwar convertible, popular for rallies
• Star Sapphire: final generation with automatic, luxury trim undefined

Interior, Comfort, Exterior and Design

Interiors blend wool or leather upholstery with polished wooden veneers. Dashboard layouts reflect period luxury, featuring comprehensive instrumentation. Notable are the elongated body lines, upright grilles, and subtle styling cues—such as the Sphinx mascot and distinctive oval grille badge. Factory bespoke features were not uncommon, especially for high-status clientele. Special models (e.g., Station Coupe) offered dual-cab utility layouts for export markets, particularly Australia. Optional accessories included Wilson Preselector gearboxes and specific paint finishes on request.

Other Relevant Features

The Armstrong-Siddeley logo—with its stylised 'AS' monogram above a Sphinx—underscores the brand’s ethos: silent, dignified motoring. Many parts, records, and rights are preserved by the Armstrong Siddeley Owners Club, which remains a resource for owners and restorers. The marque’s influence extended well beyond cars, contributing to Britain’s aeronautical development.

Summary

Armstrong-Siddeley offers a unique fusion of British luxury, mechanical innovation, and historical pedigree. With a lineage spanning sophisticated saloons, convertibles, and export specials, these vehicles remain a touchstone for discerning collectors who value craftsmanship, engineering, and authentic period character.