The Citroen CX II 25 GTi Turbo, produced between 1985 and 1986, represented a high-performance variant within the second generation (CX II) of Citroen’s innovative CX line. Building upon the already technologically advanced CX, the 25 GTi Turbo aimed to deliver a more engaging driving experience with significantly increased power. It occupied the top echelon of the CX II range, positioned above naturally aspirated models like the 25 GTi and offering a more sporting alternative to the luxurious Prestige trim. The CX II itself was based on the platform code HX, sharing components with the Peugeot 604, and continued Citroen’s tradition of hydropneumatic suspension and distinctive styling.
Technical Specifications
| Brand | Citroen |
| Model | CX |
| Generation | CX II |
| Type (Engine) | 25 GTi Turbo (168 Hp) |
| Start of production | 1985 |
| End of production | 1986 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 14.1 l/100 km (16.7 US mpg, 20 UK mpg, 7.1 km/l) |
| Fuel consumption (extra urban) | 8 l/100 km (29.4 US mpg, 35.3 UK mpg, 12.5 km/l) |
| Fuel consumption (combined) | 10.7 l/100 km (22 US mpg, 26.4 UK mpg, 9.3 km/l) |
| 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 | 2500 cm3 (152.56 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 | 8.5:1 |
| 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 | 1885 kg (4155.71 lbs.) |
| Max load | 500 kg (1102.31 lbs.) |
| Trunk (boot) space – minimum | 485 l (17.13 cu. ft.) |
| Trunk (boot) space – maximum | 507 l (17.9 cu. ft.) |
| Fuel tank capacity | 68 l (17.96 US gal | 14.96 UK gal) |
| Max. roof load | 80 kg (176.37 lbs.) |
| Permitted trailer load with brakes (12%) | 1300 kg (2866.01 lbs.) |
| Permitted trailer load without brakes | 690 kg (1521.19 lbs.) |
| Permitted towbar download | 100 kg (220.46 lbs.) |
| Length | 4650 mm (183.07 in.) |
| Width | 1770 mm (69.69 in.) |
| Height | 1360 mm (53.54 in.) |
| Wheelbase | 2845 mm (112.01 in.) |
| Front track | 1520 mm (59.84 in.) |
| Rear (Back) track | 1370 mm (53.94 in.) |
| Ride height (ground clearance) | 160 mm (6.3 in.) |
| Drag coefficient (Cd) | 0.36 |
| Minimum turning circle (turning diameter) | 12.50 m (41.01 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 suspension | Hydro-pneumatic element |
| Rear suspension | Hydro-pneumatic element |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
Powertrain & Engine Architecture
The heart of the CX II 25 GTi Turbo was the M25.662 engine, a 2.5-liter inline-four cylinder gasoline engine. This engine was based on the Peugeot-Renault-Volvo (PRV) V6 architecture, but with two cylinders lopped off. It featured a single overhead camshaft (SOHC) valvetrain with two valves per cylinder. The key differentiator 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 was transversely mounted in the front of the vehicle. The transmission was a five-speed manual gearbox, chosen to handle the increased power and provide a more engaging driving experience. The engine’s oil capacity was 5.5 liters, and it required a specific oil specification for optimal performance and longevity.
Driving Characteristics
The CX II 25 GTi Turbo offered a significant performance upgrade over the naturally aspirated CX models. Acceleration from 0 to 60 mph was achieved in approximately 7.6 seconds, and it could reach a top speed of 220 km/h (136.7 mph). The turbocharger provided a noticeable boost in power, particularly in the mid-range, making overtaking maneuvers easier. However, the turbo also introduced a degree of turbo lag, requiring the driver to anticipate acceleration. The five-speed manual transmission allowed for precise control over the engine’s power band. The CX’s signature hydropneumatic suspension continued to provide an exceptionally smooth and comfortable ride, even at higher speeds, mitigating some of the harsher aspects of the sport-tuned engine. The steering, while hydraulic, retained a degree of feel, contributing to a confident driving experience.
Equipment & Trim Levels
The 25 GTi Turbo was well-equipped for its time. Standard features included power steering, ABS anti-lock brakes, and a comfortable interior with cloth upholstery. The dashboard featured a comprehensive instrument cluster with gauges for engine temperature, oil pressure, and fuel level. Optional extras included leather upholstery, a sunroof, and upgraded audio systems. The interior trim was generally more refined than the base CX models, reflecting its position as the performance flagship.
Chassis & Braking
The CX II utilized Citroen’s renowned hydropneumatic suspension system, providing a self-leveling ride and exceptional comfort. The front suspension employed hydropneumatic spheres and struts, while the rear suspension featured a similar setup. Braking duties were handled by ventilated discs at the front and solid discs at the rear. The ABS system helped to prevent wheel lockup during hard braking, enhancing safety. The CX II’s chassis was designed to balance comfort and handling, and the 25 GTi Turbo benefited from a slightly stiffer suspension setup to improve body control.
Market Reception & Comparison
The CX II 25 GTi Turbo was generally well-received by automotive critics, who praised 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 II 25 GTi Turbo offered a unique blend of comfort and performance. Its fuel economy, at around 22 US mpg combined, was reasonable for a turbocharged vehicle of its size and performance. The naturally aspirated 25 GTi offered better fuel economy but lacked the turbo’s power boost, while the more luxurious Prestige trim prioritized comfort over performance.
Legacy
The Citroen CX II 25 GTi Turbo remains a sought-after classic car, appreciated for its unique design, advanced technology, and engaging driving experience. The M25.662 engine, while robust, requires regular maintenance to prevent issues related to the turbocharger and fuel injection system. The hydropneumatic suspension system also demands specialized knowledge and care. Today, well-maintained examples command a premium in the used car market. The CX II 25 GTi Turbo represents a high point in Citroen’s engineering history, showcasing the company’s commitment to innovation and its ability to create truly distinctive automobiles.
