The Citroën CX I Prestige 2400, produced between 1980 and 1982, represented a significant evolution in Citroën’s long history of innovative automotive engineering. Positioned as a premium variant within the CX Series I range, the 2400 model offered a blend of comfort, performance, and advanced technology for its time. It was a flagship vehicle intended to replace the aging DS, continuing Citroën’s tradition of hydropneumatic suspension and distinctive styling. The CX, internally designated as the GSA/GSA Break, was built upon a new platform, representing a departure from the DS’s design while retaining many of its core technological features. This particular 2400 Prestige trim aimed for buyers seeking a more refined experience than the base models, offering enhanced equipment and a more powerful engine.
Technical Specifications
| Brand | Citroen |
| Model | CX |
| Generation | CX I |
| Type (Engine) | Prestige 2400 (130 Hp) |
| Start of production | 1980 year |
| End of production | 1982 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 10.9 sec |
| Acceleration 0 – 62 mph | 10.9 sec |
| Acceleration 0 – 60 mph | 10.4 sec |
| Maximum speed | 192 km/h / 119.3 mph |
| Weight-to-power ratio | 11.2 kg/Hp, 89.3 Hp/tonne |
| Weight-to-torque ratio | 7.2 kg/Nm, 138.1 Nm/tonne |
| Power | 130 Hp @ 5000 rpm |
| Power per litre | 55.4 Hp/l |
| Torque | 201 Nm @ 3750 rpm / 148.25 lb.-ft. @ 3750 rpm |
| Engine layout | Front, Transverse |
| Engine Model/Code | M23.622 |
| Engine displacement | 2347 cm3 / 143.22 cu. in. |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 93.5 mm / 3.68 in. |
| Piston Stroke | 85.5 mm / 3.37 in. |
| Compression ratio | 9:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Engine oil capacity | 5.3 l / 5.6 US qt | 4.66 UK qt |
| Coolant | 11 l / 11.62 US qt | 9.68 UK qt |
| Kerb Weight | 1455 kg / 3207.73 lbs |
| Max. weight | 1925 kg / 4243.9 lbs |
| Max load | 470 kg / 1036.17 lbs |
| Trunk (boot) space – minimum | 325 l / 11.48 cu. ft |
| Fuel tank capacity | 68 l / 17.96 US gal | 14.96 UK gal |
| Permitted trailer load with brakes (12%) | 1300 kg / 2866.01 lbs |
| Length | 4916 mm / 193.54 in |
| Width | 1734 mm / 68.27 in |
| Height | 1357 mm / 53.43 in |
| Wheelbase | 3095 mm / 121.85 in |
| Front track | 1474 mm / 58.03 in |
| Rear (Back) track | 1360 mm / 53.54 in |
| Front overhang | 1057 mm / 41.61 in |
| Rear overhang | 764 mm / 30.08 in |
| Ride height (ground clearance) | 155 mm / 6.1 in |
| Drag coefficient (Cd) | 0.37 |
| Minimum turning circle (turning diameter) | 11.80 m / 38.71 ft |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the front wheels of the vehicle. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Steering type | Steering rack and pinion |
| Wheel rims size | 5.5J x 14 |
Powertrain & Engine Architecture
The Citroën CX I Prestige 2400 was powered by the M23.622 engine, a 2.4-liter inline-four cylinder gasoline engine. This engine was a significant upgrade from the smaller engines offered in other CX variants. It featured a cast iron block and an aluminum cylinder head, employing a dual overhead camshaft (DOHC) design with two valves per cylinder. The engine utilized Bosch multi-port fuel injection, contributing to improved fuel efficiency and smoother power delivery compared to carbureted engines. The M23 engine family was known for its robustness and relatively simple design, making it easier to maintain. The 2400 Prestige was exclusively offered with a five-speed manual transmission, providing drivers with greater control over the engine’s power band. This transmission was designed to handle the increased torque output of the larger engine, offering precise shifts and a comfortable driving experience.
Driving Characteristics
The CX I Prestige 2400 offered a unique driving experience largely defined by its hydropneumatic suspension system. This system, a Citroën hallmark, provided an exceptionally smooth and comfortable ride, absorbing bumps and imperfections in the road with remarkable effectiveness. The 130 horsepower engine, while not exceptionally powerful by modern standards, provided adequate performance for comfortable cruising and overtaking. Acceleration from 0 to 60 mph took approximately 10.4 seconds, and the car could reach a top speed of 119.3 mph. Compared to the lower-powered CX models, the 2400 Prestige felt noticeably more responsive, particularly at higher speeds. The five-speed manual transmission allowed drivers to keep the engine in its optimal power range, enhancing both performance and fuel economy. However, the CX’s steering, while precise, could feel somewhat heavy at low speeds, requiring a bit of effort for maneuvering in tight spaces.
Equipment & Trim Levels
The Prestige trim level of the CX I 2400 was well-equipped for its time. Standard features included comfortable cloth upholstery, power-assisted steering, and a comprehensive instrument panel. The interior was designed with a focus on ergonomics and driver comfort. Optional extras included leather upholstery, air conditioning, and a sunroof. The Prestige trim also featured upgraded exterior trim, including chrome accents and distinctive alloy wheels. The CX’s interior was known for its spaciousness and practical design, offering ample room for passengers and luggage. The hatchback body style provided easy access to the cargo area, making it a versatile vehicle for both everyday use and long-distance travel.
Chassis & Braking
The CX I Prestige 2400 featured a robust chassis designed to complement its advanced suspension system. The car utilized a monocoque construction, providing a strong and rigid body structure. The front suspension consisted of independent double wishbones with hydropneumatic springs and dampers, while the rear suspension employed a torsion beam axle with hydropneumatic springs and dampers. Braking duties were handled by ventilated disc brakes at the front and solid disc brakes at the rear, providing ample stopping power. The steering system was a rack and pinion type, offering precise and responsive steering control. The CX’s suspension system allowed for adjustable ride height, enabling drivers to raise or lower the car to suit different driving conditions.
Market Reception & Comparison
The Citroën CX I Prestige 2400 was generally well-received by automotive critics, who praised its innovative technology, comfortable ride, and distinctive styling. However, some critics noted that the car’s complex hydropneumatic suspension system could be expensive to maintain. Compared to other vehicles in its class, such as the Peugeot 504 and the Rover SD1, the CX offered a more advanced and sophisticated driving experience. The 2400 Prestige model was positioned as a premium offering, competing with higher-end vehicles such as the Mercedes-Benz W116. Fuel economy was reasonable for a car of its size and engine displacement, averaging around 22-25 mpg. Reliability was generally good, although the hydropneumatic suspension system required regular maintenance to prevent issues.
Legacy
The Citroën CX I Prestige 2400 remains a highly regarded classic car, appreciated by enthusiasts for its innovative engineering and unique character. The M23 engine, while not known for being a high-performance unit, proved to be durable and reliable when properly maintained. The hydropneumatic suspension system, while complex, continues to be admired for its exceptional ride quality. Today, the CX I Prestige 2400 is a sought-after vehicle in the classic car market, with well-maintained examples commanding premium prices. Its legacy as a technologically advanced and comfortable grand tourer continues to endure, cementing its place in automotive history.

