The Austin FX3D Taxi Diesel was a crucial evolution of the original FX3, addressing a growing demand for more economical operation in the taxi trade. Introduced in 1954—six years after the petrol-powered FX3 debuted—the FX3D was fitted with a 2.2-litre Austin diesel engine, which significantly improved fuel efficiency and running costs for London cabbies.
Visually, the FX3D was nearly identical to its petrol counterpart, retaining the same upright, purposeful styling with a partitioned driver’s cab and spacious rear compartment capable of seating up to three passengers comfortably. The front “luggage bench” in place of a passenger seat was also retained, keeping it in compliance with taxi licensing regulations and allowing room for additional baggage or deliveries.
Mechanically, the diesel engine was an important development. Though not particularly powerful by modern standards, it provided sufficient torque for the stop-start nature of city driving and proved incredibly robust and long-lasting. The engine’s longevity and economy helped many drivers operate their taxis for years—sometimes decades—making the FX3D a favorite among London taxi owners.
The FX3D retained the same solid rear axle and leaf spring suspension setup, offering a firm but stable ride. Its 25-foot turning circle remained one of its standout features, perfectly suited to London’s tight streets and strict cab regulations. Brakes were hydraulic front and mechanical rear, and although the ride could be a bit stiff, the FX3D was widely praised for its reliability and dependability.
The diesel FX3D stayed in production until 1958 when the more modern Austin FX4 took its place. Despite that, many FX3Ds remained in use into the 1960s and even ’70s. Today, the diesel version is particularly sought-after by collectors for its historical significance and mechanical endurance, often restored to full working order and displayed at classic car events or used for nostalgic tours. It represents a pivotal point in the evolution of British taxi design—a rugged workhorse that helped shape the identity of post-war London streets.