The Citroën CX 25 GTi Turbo, produced between 1984 and 1985, represented the performance pinnacle of the first generation (CX I, Phase I) of Citroën’s innovative CX model line. Building upon the already technologically advanced CX, the 25 GTi Turbo aimed to deliver a compelling blend of luxury, comfort, and spirited performance. It occupied the top-tier position within the CX range, offering a more potent alternative to the naturally aspirated 25 models. The CX itself was a significant vehicle for Citroën, embodying their commitment to hydropneumatic suspension and aerodynamic design, and the 25 GTi Turbo further cemented this reputation.
Technical Specifications
| Brand | Citroen |
| Model | CX |
| Generation | CX I (Phase I, 1982) |
| Type (Engine) | 25 GTi Turbo (168 Hp) |
| Start of production | 1984 |
| End of production | 1985 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8 sec |
| Acceleration 0 – 62 mph | 8 sec |
| Acceleration 0 – 60 mph | 7.6 sec |
| Maximum speed | 220 km/h (136.7 mph) |
| Weight-to-power ratio | 8.2 kg/Hp, 121.3 Hp/tonne |
| Weight-to-torque ratio | 4.7 kg/Nm, 212.3 Nm/tonne |
| Power | 168 Hp @ 5000 rpm |
| Power per litre | 67.2 Hp/l |
| Torque | 294 Nm @ 3250 rpm (216.84 lb.-ft. @ 3250 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | M25.662 |
| Engine displacement | 2499 cm3 (152.5 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 93 mm (3.66 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Compression ratio | 7.75:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Turbocharger |
| Engine oil capacity | 5.5 l (5.81 US qt | 4.84 UK qt) |
| Coolant | 12.5 l (13.21 US qt | 11 UK qt) |
| Kerb Weight | 1385 kg (3053.4 lbs.) |
| Max. weight | 1880 kg (4144.69 lbs.) |
| Max load | 495 kg (1091.29 lbs.) |
| Trunk (boot) space – minimum | 325 l (11.48 cu. ft.) |
| Fuel tank capacity | 68 l (17.96 US gal | 14.96 UK gal) |
| Length | 4659 mm (183.43 in.) |
| Width | 1770 mm (69.69 in.) |
| Height | 1360 mm (53.54 in.) |
| Wheelbase | 2845 mm (112.01 in.) |
| Front track | 1522 mm (59.92 in.) |
| Rear (Back) track | 1368 mm (53.86 in.) |
| Front overhang | 1050 mm (41.34 in.) |
| Rear overhang | 764 mm (30.08 in.) |
| Drag coefficient (Cd) | 0.36 |
| Minimum turning circle | 11.7 m (38.39 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 |
Powertrain & Engine Architecture
The heart of the CX 25 GTi Turbo was the M25.662 engine, a 2.5-liter inline-four cylinder powerplant. This engine was based on the Peugeot-Renault-Volvo (PRV) V6 architecture, but with two cylinders lopped off. It featured a cast iron block and an aluminum cylinder head. The key differentiating factor was the addition of a Garrett T3 turbocharger and an intercooler, boosting power output to 168 horsepower at 5000 rpm and 294 Nm (216.84 lb-ft) of torque at 3250 rpm. Fuel delivery was managed by Bosch multi-port fuel injection. The engine utilized a relatively conservative 7.75:1 compression ratio to accommodate the turbocharging. The CX 25 GTi Turbo was exclusively offered with a five-speed manual transmission, chosen to handle the increased power and torque. This transmission was known for its robust construction and precise shift feel.
Driving Characteristics
The CX 25 GTi Turbo offered a distinctly different driving experience compared to the naturally aspirated versions. The turbocharger provided a noticeable surge of power, particularly in the mid-range, resulting in brisk acceleration. The 0-60 mph time of around 7.6 seconds was impressive for the early 1980s. The five-speed manual transmission allowed drivers to keep the engine in its optimal power band. While the CX was renowned for its comfortable ride thanks to its hydropneumatic suspension, the GTi Turbo variant had a slightly firmer setup to improve handling and reduce body roll. The steering, a rack-and-pinion system, was precise and well-weighted, contributing to a confident feel behind the wheel. However, the turbo lag was noticeable, requiring drivers to anticipate power delivery.
Equipment & Trim Levels
The 25 GTi Turbo was the most well-equipped version of the CX. Standard features included leather upholstery, power windows, central locking, and a high-quality stereo system. The interior trim was generally more refined than lower-spec models, with attention paid to detail and material quality. Optional extras included air conditioning, a sunroof, and upgraded sound systems. The exterior was distinguished by subtle styling cues, such as a rear spoiler and unique alloy wheels. The dashboard layout was typical of Citroën at the time, featuring a combination of analog gauges and switches, all designed with ergonomics in mind.
Chassis & Braking
The CX’s chassis was a monocoque construction, providing a strong and rigid platform. The defining feature was, of course, the hydropneumatic suspension system, which utilized self-leveling spheres filled with nitrogen and hydraulic fluid. This system provided an exceptionally smooth and comfortable ride, absorbing bumps and imperfections in the road with ease. The 25 GTi Turbo featured ventilated disc brakes on the front wheels and solid discs on the rear, providing adequate stopping power for its performance level. The steering was a rack-and-pinion setup, offering precise control and feedback.
Market Reception & Comparison
The Citroën CX 25 GTi Turbo was generally well-received by automotive critics. It was praised for its performance, comfortable ride, and innovative technology. However, some critics noted the turbo lag and the complexity of the hydropneumatic suspension system, which could lead to higher maintenance costs. Compared to other performance hatchbacks of the era, such as the Ford Escort RS Turbo or the Volkswagen Golf GTI, the CX 25 GTi Turbo offered a more luxurious and refined experience, albeit at a higher price point. Fuel economy was reasonable for a turbocharged vehicle of its size and performance, averaging around 22-25 mpg in mixed driving.
Legacy
The Citroën CX 25 GTi Turbo remains a sought-after classic car today. Its combination of performance, comfort, and innovative technology continues to appeal to enthusiasts. The hydropneumatic suspension system, while complex, is a testament to Citroën’s engineering prowess. The M25 engine, while not without its quirks, is generally reliable if properly maintained. Finding well-preserved examples can be challenging, as many have suffered from neglect or improper repairs. However, for those willing to invest the time and effort, the CX 25 GTi Turbo offers a unique and rewarding driving experience, representing a high point in Citroën’s history.
