The Citroën CX 2400 GTi, produced between 1977 and 1980, represented a high-performance variant within the first generation (Series I) of the CX model line. The CX, internally designated as the GSA/GSA Break, was Citroën’s flagship saloon, succeeding the iconic DS. The 2400 GTi, positioned as the top-of-the-line CX I, offered a blend of luxury, advanced engineering, and spirited performance, embodying Citroën’s commitment to innovation. It was built on the platform known as the CX I, and was a key model in establishing the CX’s reputation as a sophisticated grand tourer.
Technical Specifications
| Brand | Citroën |
| Model | CX |
| Generation | CX I |
| Type (Engine) | 2400 GTi (128 Hp) |
| Start of production | 1977 |
| End of production | 1980 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 10.5 sec |
| Acceleration 0 – 62 mph | 10.5 sec |
| Acceleration 0 – 60 mph | 10 sec |
| Maximum speed | 189 km/h (117.44 mph) |
| Weight-to-power ratio | 10.5 kg/Hp, 95.2 Hp/tonne |
| Weight-to-torque ratio | 6.8 kg/Nm, 146.5 Nm/tonne |
| Power | 128 Hp @ 4800 rpm |
| Power per litre | 54.5 Hp/l |
| Torque | 197 Nm @ 3600 rpm (145.3 lb.-ft. @ 3600 rpm) |
| Maximum engine speed | 5600 rpm |
| Engine layout | Front, Transverse |
| Engine Model/Code | M23.622 |
| Engine displacement | 2350 cm3 (143.41 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 | 8.75:1 |
| 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 | 12.3 l (13 US qt | 10.82 UK qt) |
| Kerb Weight | 1345 kg (2965.22 lbs.) |
| Max. weight | 1810 kg (3990.37 lbs.) |
| Max load | 465 kg (1025.15 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 without brakes | 670 kg (1477.1 lbs.) |
| Length | 4666 mm (183.7 in.) |
| Width | 1730 mm (68.11 in.) |
| Height | 1360 mm (53.54 in.) |
| Wheelbase | 2845 mm (112.01 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 |
Introduction
The Citroën CX 2400 GTi, launched in 1977, was a significant iteration of the CX model, representing the pinnacle of performance for the initial series. The CX was designed as a replacement for the long-running and beloved DS, aiming to continue Citroën’s tradition of innovative engineering and comfortable ride quality. The 2400 GTi, with its larger engine and improved specifications, was intended to appeal to drivers seeking a more dynamic driving experience without sacrificing the CX’s inherent refinement. It was a five-door hatchback, offering practicality alongside its luxurious appointments.
Powertrain & Engine Architecture
The heart of the CX 2400 GTi was the M23.622 inline-four cylinder engine, displacing 2350cc. This engine featured a cast iron block and an aluminum cylinder head, employing a belt-driven single overhead camshaft operating two valves per cylinder. Fuel delivery was handled by a Bosch multi-port fuel injection system, contributing to improved efficiency and responsiveness compared to earlier carbureted Citroën engines. The engine produced 128 horsepower at 4800 rpm and 197 Nm (145.3 lb-ft) of torque at 3600 rpm. The engine’s transverse mounting and front-wheel drive configuration were hallmarks of Citroën’s engineering philosophy at the time. The 2400 GTi was exclusively offered with a five-speed manual transmission, designed to effectively manage the engine’s power output and provide a more engaging driving experience.
Driving Characteristics
The CX 2400 GTi offered a noticeably more spirited driving experience than the lower-powered versions of the CX. The 128 hp engine, coupled with the five-speed manual gearbox, allowed for brisk acceleration – achieving 0-60 mph in approximately 10 seconds and a top speed of 117.44 mph. The CX’s renowned hydropneumatic suspension system, a Citroën signature, played a crucial role in the car’s handling and ride comfort. This system provided a remarkably smooth and level ride, even over uneven surfaces, while also allowing for adjustable ride height. The steering, also hydraulically assisted, was light and precise, contributing to the car’s ease of maneuverability. Compared to the later 2.5-liter versions, the 2400 GTi offered a slightly more responsive feel due to its lighter weight and quicker-revving engine.
Equipment & Trim Levels
The 2400 GTi was the most well-equipped variant of the CX I. Standard features included comfortable cloth upholstery, a wood-trimmed dashboard, and power-assisted steering. Additional features often included a sunroof, tinted glass, and upgraded audio systems. The interior was designed with a focus on ergonomics and driver comfort, reflecting Citroën’s commitment to providing a refined and luxurious driving experience. Optional extras could further enhance the car’s appeal, such as leather upholstery and air conditioning.
Chassis & Braking
The CX 2400 GTi utilized a robust chassis with independent suspension on all four wheels, utilizing Citroën’s hydropneumatic system. The front suspension featured double wishbones, while the rear employed trailing arms. Braking duties were handled by ventilated disc brakes at the front and solid discs at the rear, providing ample stopping power. The steering system was a rack and pinion setup with hydraulic assistance, offering precise control and a comfortable driving experience. The car’s relatively low weight, at 1345 kg (2965.22 lbs), contributed to its agile handling characteristics.
Market Reception & Comparison
The Citroën CX 2400 GTi was generally well-received by automotive critics, who praised its innovative engineering, comfortable ride, and spirited performance. It was often compared favorably to contemporary rivals such as the Peugeot 504 and the Rover SD1. While the 2400 GTi offered a more engaging driving experience than the lower-powered CX variants, it was also more expensive. The 2.0-liter CX models offered better fuel economy, while the later 2.5-liter versions provided even greater performance. However, the 2400 GTi struck a good balance between performance, comfort, and price, making it a popular choice for discerning buyers.
Legacy
The Citroën CX 2400 GTi remains a highly regarded classic car, appreciated for its innovative engineering and distinctive styling. The M23 engine, while not without its quirks, proved to be relatively reliable when properly maintained. Today, the CX 2400 GTi is sought after by collectors and enthusiasts who appreciate its unique character and driving experience. Parts availability can be a challenge, but a dedicated community of owners and specialists ensures that these cars can be kept on the road. The CX 2400 GTi represents a high point in Citroën’s history, embodying the company’s commitment to innovation and its ability to create truly exceptional automobiles.
