This detailed workshop manual, originally issued by Armstrong Siddeley to their authorized dealers and technicians, provides comprehensive guidance for maintaining and repairing your Armstrong Siddeley Sapphire 346 model manufactured between 1953 and 1958. Whether you are a home mechanic or a professional technician, this manual will serve as an invaluable resource, offering a complete understanding of the vehicle's systems and components.

The manual covers a wide range of topics, including a fully interactive index for easy navigation. You will find detailed information on engine operation, lubrication systems, carburetor adjustments, decarbonizing and valve grinding procedures, the centrifugal clutch and preselector gearbox, synchromesh gearbox operation, automatic gearbox maintenance, propeller shaft, rear axle assembly, front wheel construction, suspension system details, braking system components and adjustments, steering gear components, wheels and tires, jacking procedures, battery maintenance, dynamo operation, starter motor, distributor function, control box components, lamp replacements, trafficator operation, windscreen wiper maintenance, electric horn systems, and the preselector gear change mechanism.

The Armstrong Siddeley Sapphire 346, produced from 1953 to 1958, was a British luxury saloon car that exemplified the marque's commitment to performance and elegance. It was the successor to the popular Sapphire model and marked a significant departure from its predecessor with a completely new body style designed by the renowned coachbuilder, Graber of Switzerland. The Sapphire 346 was a true head-turner, boasting a sleek, flowing design with a distinctive low-slung profile and subtle yet stylish detailing. Its graceful lines concealed a robust chassis and a powerful 3.4-liter inline six-cylinder engine developing 130 horsepower, making it one of the fastest and most powerful cars of its time.

The Sapphire 346 offered a luxurious and comfortable driving experience. Inside, the car featured high-quality materials, opulent leather upholstery, and a dashboard that was both practical and stylish. The car's performance was equally impressive, with the straight-six engine delivering smooth power delivery and a top speed of over 100 mph. However, despite its many virtues, the Sapphire 346 was a relatively expensive and exclusive car, with only a limited number being produced. Nevertheless, it earned a reputation for its refined elegance, exceptional performance, and prestigious status, cementing its place among the most desirable British cars of the 1950s.