The Citroën CX I Prestige 25 Automatic, produced between 1983 and 1985, represented a luxurious and technologically advanced offering within the first generation (Phase I) of the CX model line. Positioned as a premium variant, it combined a 2.5-liter inline-four engine with a three-speed automatic transmission, targeting buyers seeking comfort and refinement alongside the CX’s renowned hydropneumatic suspension. The CX, launched in 1974, was intended as a replacement for the iconic DS, continuing Citroën’s tradition of innovative engineering and distinctive styling. The Prestige 25 Automatic occupied a higher tier within the CX I range, sitting above the more basic 2.0-liter models and below the higher-performance 2.2-liter versions.
Technical Specifications
| Brand | Citroën |
| Model | CX |
| Generation | CX I (Phase I, 1982) |
| Type (Engine) | Prestige 25 (138 Hp) Automatic |
| Start of production | 1983 |
| 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 | 12.3 sec |
| Acceleration 0 – 62 mph | 12.3 sec |
| Acceleration 0 – 60 mph | 11.7 sec |
| Maximum speed | 194 km/h (120.55 mph) |
| Weight-to-power ratio | 10.5 kg/Hp, 95.2 Hp/tonne |
| Weight-to-torque ratio | 6.9 kg/Nm, 145.5 Nm/tonne |
| Power | 138 Hp @ 5000 rpm |
| Power per litre | 55.2 Hp/l |
| Torque | 211 Nm @ 4000 rpm (155.63 lb.-ft. @ 4000 rpm) |
| Maximum engine speed | 6000 rpm |
| Engine layout | Front, Transverse |
| Engine Model/Code | M25.659 |
| 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 | 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 l (5.28 US qt | 4.4 UK qt) |
| Coolant | 12.3 l (13 US qt | 10.82 UK qt) |
| Kerb Weight | 1450 kg (3196.7 lbs.) |
| Max. weight | 1910 kg (4210.83 lbs.) |
| Max load | 460 kg (1014.13 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 | 4916 mm (193.54 in.) |
| Width | 1770 mm (69.69 in.) |
| Height | 1375 mm (54.13 in.) |
| Wheelbase | 3095 mm (121.85 in.) |
| Front track | 1522 mm (59.92 in.) |
| Rear (Back) track | 1368 mm (53.86 in.) |
| Front overhang | 1057 mm (41.61 in.) |
| Rear overhang | 764 mm (30.08 in.) |
| Drag coefficient (Cd) | 0.36 |
| Minimum turning circle | 13.4 m (43.96 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 | 3 gears, automatic transmission |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Steering type | Steering rack and pinion |
Powertrain & Engine Architecture
The heart of the CX Prestige 25 Automatic was the M25.659 engine, a 2.5-liter inline-four cylinder gasoline engine. This engine featured a cast iron block and an aluminum cylinder head, employing a belt-driven single overhead camshaft (SOHC) valvetrain with two valves per cylinder. Fuel delivery was managed by a Bosch multi-port fuel injection system, providing improved efficiency and responsiveness compared to earlier carbureted Citroën engines. The engine produced 138 horsepower at 5000 rpm and 211 Nm (155.63 lb-ft) of torque at 4000 rpm. The three-speed automatic transmission, while offering convenience, was a relatively conventional unit for the time. It wasn’t known for particularly quick shifts, but it was durable and well-suited to the CX’s emphasis on comfortable cruising.
Driving Characteristics
The CX Prestige 25 Automatic offered a distinctly different driving experience compared to its manual transmission counterparts or the higher-output 2.2-liter models. The automatic transmission, while smooth, resulted in slightly slower acceleration – a 0-60 mph time of around 11.7 seconds. The gear ratios were optimized for relaxed cruising rather than spirited performance. The hydropneumatic suspension, however, remained a defining characteristic, providing an exceptionally smooth and comfortable ride, even on uneven surfaces. The steering, also hydraulically assisted, was light and precise. The automatic transmission did diminish some of the driver engagement found in the manual versions, but it catered to a clientele prioritizing ease of use and comfort.
Equipment & Trim Levels
The Prestige trim level denoted a higher level of luxury. Standard features included comfortable cloth upholstery, power steering, central locking, and electric windows. The dashboard featured a distinctive design with a combination of analog gauges and warning lights. Optional extras included leather upholstery, a sunroof, and upgraded audio systems. The CX Prestige 25 Automatic was generally well-equipped for its era, offering a level of refinement comparable to other luxury hatchbacks of the time.
Chassis & Braking
The CX utilized a monocoque chassis construction, providing a strong and rigid platform. The hydropneumatic suspension system, developed by Citroën, was a key feature, offering self-leveling and adjustable ride height. The front suspension employed independent double wishbones, while the rear utilized a trailing arm setup. Braking was provided by ventilated discs at the front and solid discs at the rear, offering adequate stopping power for the vehicle’s weight and performance. The steering system was a rack and pinion design with hydraulic assistance, providing light and precise steering feel.
Market Reception & Comparison
The CX Prestige 25 Automatic was generally well-received by automotive critics, who praised its comfortable ride, innovative suspension, and refined interior. However, the automatic transmission was sometimes criticized for its lack of responsiveness and its impact on fuel economy. Compared to the manual transmission versions, the automatic offered slightly lower fuel efficiency. Against competitors like the Peugeot 505 and the Rover SD1, the CX offered a unique blend of comfort, technology, and distinctive styling. The automatic transmission appealed to buyers who prioritized ease of driving over outright performance.
Legacy
The Citroën CX, while not a massive sales success, remains a highly regarded classic car. The Prestige 25 Automatic, while not the most sought-after variant, is appreciated for its comfortable ride and luxurious appointments. The M25.659 engine, when properly maintained, proved to be a durable and reliable unit. Today, finding a well-preserved CX Prestige 25 Automatic can be challenging, but they are prized by enthusiasts for their unique character and innovative engineering. Parts availability can be an issue, but a dedicated community of CX owners and specialists exists to support the preservation of these iconic vehicles. The hydropneumatic suspension, while requiring specialized maintenance, continues to be a defining feature that sets the CX apart from its contemporaries.
