1975-1977 Citroen CX I Prestige 2400 (116 Hp)

The Citroën CX I Prestige 2400, produced between 1975 and 1977, represents the initial offering in the groundbreaking CX series. Positioned as the flagship model of Citroën’s innovative lineup, the CX aimed to succeed the venerable DS, continuing the tradition of hydropneumatic suspension and advanced engineering. The “I” designation denotes the first generation of the CX, while “Prestige 2400” identifies the engine displacement and trim level. This model served as the entry point into the CX range, offering a blend of comfort, performance, and Citroën’s signature technological advancements. It was primarily marketed in Europe, where Citroën held a strong reputation for avant-garde automotive design.

Technical Specifications

Powertrain & Engine Architecture

The Citroën CX I Prestige 2400 was powered by the M23.623 engine, a 2.4-liter inline-four cylinder petrol engine. This engine, a development of earlier Citroën powerplants, featured a cast iron block and an aluminum cylinder head. It utilized a single overhead camshaft (SOHC) valvetrain with two valves per cylinder. Fuel delivery was managed by a Solex C35 PHH carburetor, a common setup for European vehicles of the era. The engine produced 116 horsepower at 5,500 rpm and 180 Nm (132.76 lb-ft) of torque at 3,000 rpm. The engine’s transverse mounting within the front-wheel-drive layout contributed to the CX’s compact engine bay and improved packaging. The transmission was a four-speed manual gearbox, providing a relatively conventional driving experience for the time.

Driving Characteristics

The CX I Prestige 2400 offered a unique driving experience largely defined by its hydropneumatic suspension. This system, a hallmark of Citroën engineering, provided an exceptionally smooth and comfortable ride, absorbing road imperfections with remarkable effectiveness. However, the 116 hp engine and four-speed manual transmission meant that performance was adequate rather than exhilarating. Acceleration to 60 mph took approximately 10.5 seconds, and the top speed was around 112 mph. Compared to later, more powerful CX variants like the 2500 GTI or the Turbo models, the 2400 felt somewhat underpowered, particularly when fully loaded. The gear ratios were geared towards comfort and fuel efficiency, rather than outright acceleration. The steering, while precise, lacked the power assistance found in some contemporary vehicles, requiring a bit more effort at low speeds.

Equipment & Trim Levels

The “Prestige” trim level for the CX I 2400 indicated a higher level of standard equipment. Interior features included comfortable cloth upholstery, a wood-trimmed dashboard, and a comprehensive instrument panel. Standard features included power-assisted steering, disc brakes on all four wheels, and the aforementioned hydropneumatic suspension. Optional extras included a sunroof, air conditioning, and upgraded audio systems. The interior design prioritized ergonomics and comfort, reflecting Citroën’s commitment to driver and passenger well-being. The CX I Prestige 2400 aimed to provide a refined and luxurious experience, albeit within the constraints of its entry-level positioning in the CX lineup.

Chassis & Braking

The CX I Prestige 2400 utilized a monocoque chassis construction, providing a rigid and lightweight platform. The hydropneumatic suspension system, featuring self-leveling and height adjustment, was a key component of the chassis design. The front suspension employed independent double wishbones, while the rear suspension utilized a trailing arm design. Braking was provided by ventilated discs on the front wheels and solid discs on the rear, offering adequate stopping power for the vehicle’s weight and performance. The steering system was a rack and pinion setup, providing precise and responsive handling. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering.

Market Reception & Comparison

The Citroën CX I Prestige 2400 was generally well-received by automotive critics, who praised its innovative suspension system and comfortable ride. However, some reviewers noted the engine’s lack of outright power and the relatively high price compared to competitors. Compared to other vehicles in its class, such as the Peugeot 504 or the Rover SD1, the CX offered a more sophisticated and technologically advanced driving experience. Fuel economy was reasonable for the time, averaging around 25-30 mpg. Reliability was generally good, although the complexity of the hydropneumatic suspension system could lead to occasional maintenance issues. The CX I 2400 appealed to buyers who prioritized comfort, innovation, and a unique driving experience over outright performance.

Legacy

The Citroën CX I Prestige 2400, while the entry-level model, played a crucial role in establishing the CX as a technological tour de force. The M23 engine proved to be a durable and reliable powerplant, and many examples remain on the road today. The hydropneumatic suspension system, while requiring specialized maintenance, continues to be admired for its exceptional ride quality. In the used car market, the CX I 2400 represents an affordable entry point into Citroën’s iconic CX range. Its relative simplicity compared to later, more complex CX variants makes it a potentially easier vehicle to maintain and restore. The CX series, as a whole, is remembered as a bold and innovative design that pushed the boundaries of automotive engineering.