Armstrong Siddeley

Armstrong Siddeley Price Guide

Armstrong Siddeleys occupy a distinctive space in the British classic car market – a step above the everyday saloons of the period but without the price tag that comes with the Rolls-Royce and Bentley badges. If you are trying to establish what your Armstrong Siddeley is worth, this positioning works both for and against you. The cars are well engineered, comfortable, and characterful, but they have never attracted the speculative money that inflates values elsewhere. What you get instead is a stable, enthusiast-driven market where fair prices reflect genuine quality.

What Affects Armstrong Siddeley Values

Body style is the most significant variable. Drophead coupes and tourers are consistently worth more than their saloon equivalents across all eras, often by a substantial margin. The Wilson pre-selector gearbox, fitted to most models from the early 1930s onwards, is a distinctive feature that some buyers love and others find off-putting – but it is a core part of the Armstrong Siddeley experience and should not be seen as a drawback. Condition, completeness, and history all matter in the usual way, and the Armstrong Siddeley Owners Club is an excellent resource for parts, knowledge, and access to buyers. The club holds the original factory records, patents, and trademarks, which gives the marque an unusually well-documented support network.

Pre-War Models

The pre-war range spans from the early 1920s through to 1940, with the six-cylinder models from the 1930s being the most sought after. The 5-litre Siddeley Special, with its advanced aluminium-alloy engine derived from aero-engine technology, is the headline car and commands the strongest prices. The various 12, 17, and 20 horsepower models offer a more affordable entry into pre-war Armstrong Siddeley ownership. Drophead and sporting coachwork adds significant value. These are well-built, pleasant touring cars that are eligible for many vintage rallies and events.

Post-War Models

The post-war cars are where most of the market activity sits. The Lancaster, Hurricane, Whitley, and Typhoon (all named after wartime aircraft) represent the immediate post-war generation and are honest, usable classics with a loyal following. The later Sapphire (1953-1959) is widely regarded as the finest Armstrong Siddeley, combining a smooth 3.4-litre six-cylinder engine with more modern styling and genuine refinement – it was a credible rival to the Jaguar Mk VII in period. The final Star Sapphire, with its 4-litre engine and automatic gearbox option, is the most refined of all and has a dedicated following, though production numbers were small. Across the post-war range, values are modest compared to equivalent Jaguars or Bentleys, which makes them genuinely affordable classics with strong club support.