The Rolls-Royce Phantom IV built for Aga Khan III stands as an artifact of supreme post-war coachbuilding. Between 1950 and 1956, Rolls-Royce manufactured just 18 examples of the Phantom IV, strictly restricting ownership to heads of state and royalty. Among them, the vehicle delivered to the 48th Imam of the Nizari Ismaili community remains distinct: it is the sole Phantom IV ever styled as a Sedanca de Ville.
The Genesis of an Elite Machine
Conceived to fill the gap left by pre-war giants, the Phantom IV was built on a heavy-duty chassis and powered by a straight-eight engine adapted from a military application. Ernest Hives and his engineering team wanted a car that could crawl at walking speeds during state processions without overheating, yet cruise effortlessly on open European highways.
Unlike standard production models, no two Phantom IV chassis were identical. Each was sent to elite coachbuilders who tailored the bodywork to individual royal specifications. The model's exclusivity was absolute; you couldn't simply buy one with wealth alone. You had to hold sovereign status or royal rank, making it the ultimate mobile emblem of mid-century power.
Anatomy of Chassis 4CS5: The Aga Khan's Specification
Delivered on April 6, 1952, the Aga Khan's car featured coachwork by Hooper & Co. configured in the rare Sedanca de Ville style—featuring an open front compartment for the chauffeur paired with a completely enclosed, luxurious rear passenger cabin. To get more information on this topic, comprehensive coverage can also be found on The New York Times.
- Paintwork: Originally finished in a striking two-tone green scheme that underscored its understated elegance.
- Interior Trim: Fitted with olive green leather and rich wood veneers, tailored for maximum comfort during diplomatic tours.
- Engine: Powered by an inline 5,675 cc straight-eight engine paired initially with a manual gearbox before being updated later in life.
When Rolls-Royce transferred ownership, a specific restrictive clause was written into the agreement prohibiting the Aga Khan from selling the vehicle. However, following his passing, the car changed hands and began a fascinating multi-decade journey across continents.
From Royal Mews to Global Auctions
The post-royal history of this specific Phantom IV reads like an automotive thriller. Following the restriction lapse after the Aga Khan's death, his widow sold the car. It eventually found its way to the United States, where a Missouri hotel used it for airport guest transfers. Because of its limited boot space, it was soon sold off, passing through several private collections in the United States and Europe.
For years, the car's paintwork was altered to red, shifting its character away from its subdued British racing heritage. Yet, its historical significance survived. In August 2011, it crossed the auction block at Pebble Beach, failing to meet its steep reserve of up to $1.1 million.
Real redemption came in 2015. Acquired by the Țiriac Collection, the car underwent a meticulous, frame-off restoration that returned it to its original two-tone green configuration. Today, it sits proudly as part of the only private collection housing all seven generations of the Phantom lineage.
Frequently Asked Questions
How many Rolls-Royce Phantom IV models were built?
Only 18 chassis were manufactured between 1950 and 1956, with 16 surviving today. They were allocated exclusively to monarchs and heads of state.
Why is the Aga Khan's Phantom IV unique?
It is the only Phantom IV built with Sedanca de Ville coachwork by Hooper, featuring an open driver's compartment and an enclosed rear cabin.
What engine powered the Phantom IV?
It utilized a derivative of Rolls-Royce's B80 straight-eight petrol engine, displacing 5,675 cc, designed specifically to provide immense low-end torque for ceremonial processions.
Where can you see the car today?
The restored vehicle is housed in Bucharest, Romania, as part of the permanent Țiriac Collection.
