The Citroën C4 I Coupe, specifically the 2.0 HDi 16V (136 hp) FAP variant produced between 2004 and 2008, represented a significant offering in the European compact coupe market. Positioned as a stylish and efficient alternative to more conventional hatchback designs, the C4 Coupe aimed to blend practicality with a sporty aesthetic. This particular engine and trim level occupied a mid-range position within the C4 Coupe lineup, offering a balance between performance, fuel economy, and equipment. It was part of the first generation C4 (code name BX), sharing its platform with the Peugeot 307. The “FAP” designation indicates the inclusion of a Diesel Particulate Filter, a key component in meeting increasingly stringent European emission standards.
Technical Specifications
| Brand | Citroen |
| Model | C4 |
| Generation | C4 I Coupe (Phase I, 2004) |
| Type (Engine) | 2.0 HDi 16V (136 Hp) FAP |
| Start of production | 2004 |
| End of production | 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 5 |
| Doors | 3 |
| Fuel consumption (urban) | 7.1 l/100 km (33.1 US mpg, 39.8 UK mpg, 14.1 km/l) |
| Fuel consumption (extra urban) | 4.5 l/100 km (52.3 US mpg, 62.8 UK mpg, 22.2 km/l) |
| Fuel consumption (combined) | 5.4 l/100 km (43.6 US mpg, 52.3 UK mpg, 18.5 km/l) |
| CO2 emissions | 142 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 10.5 sec |
| Acceleration 0 – 62 mph | 10.5 sec |
| Acceleration 0 – 60 mph | 10 sec |
| Maximum speed | 207 km/h (128.62 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 10.1 kg/Hp |
| Weight-to-torque ratio | 4.1 kg/Nm |
| Power | 136 Hp @ 4000 rpm |
| Torque | 340 Nm @ 2000 rpm (250.77 lb.-ft. @ 2000 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | RHR DW10BTED4 |
| Engine displacement | 1997 cm3 (121.86 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 85 mm (3.35 in.) |
| Piston Stroke | 88 mm (3.46 in.) |
| Compression ratio | 18:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 5.25 l (5.55 US qt | 4.62 UK qt) |
| Coolant | 10 l (10.57 US qt | 8.8 UK qt) |
| Kerb Weight | 1379 kg (3040.17 lbs.) |
| Max. weight | 1835 kg (4045.48 lbs.) |
| Max load | 456 kg (1005.31 lbs.) |
| Trunk (boot) space – minimum | 314 l (11.09 cu. ft.) |
| Fuel tank capacity | 60 l (15.85 US gal | 13.2 UK gal) |
| Max. roof load | 75 kg (165.35 lbs.) |
| Permitted trailer load with brakes (8%) | 1800 kg (3968.32 lbs.) |
| Permitted trailer load with brakes (12%) | 1500 kg (3306.93 lbs.) |
| Permitted trailer load without brakes | 727 kg (1602.76 lbs.) |
| Permitted towbar download | 73 kg (160.94 lbs.) |
| Length | 4273 mm (168.23 in.) |
| Width | 1769 mm (69.65 in.) |
| Width including mirrors | 1964 mm (77.32 in.) |
| Height | 1456 mm (57.32 in.) |
| Wheelbase | 2608 mm (102.68 in.) |
| Front track | 1505 mm (59.25 in.) |
| Rear (Back) track | 1502 mm (59.13 in.) |
| Front overhang | 935 mm (36.81 in.) |
| Rear overhang | 730 mm (28.74 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle | 12 m (39.37 ft.) |
| Drivetrain Architecture | Front wheel drive |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 205/55 R16; 205/50 R17 |
| Wheel rims size | 6.5J x 16; 6.5J x 17 |
Powertrain & Engine Architecture
The heart of this C4 Coupe variant is the DW10BTED4 engine, a 2.0-liter four-cylinder diesel engine. This engine, commonly found in PSA Group (Peugeot and Citroën) vehicles of the era, is characterized by its robust construction and relatively sophisticated technology for its time. It utilizes a common rail direct injection system, delivering fuel at extremely high pressure for improved combustion efficiency and reduced emissions. The 16-valve DOHC (Double Overhead Camshaft) cylinder head further enhances breathing and contributes to the engine’s power output. The inclusion of a turbocharger with an intercooler significantly boosts torque, providing strong acceleration even at lower engine speeds. The FAP (Filtre à Particules) or Diesel Particulate Filter, was a crucial addition to meet Euro 4 emission standards, trapping soot particles from the exhaust. The engine is transversely mounted, driving the front wheels. The manual transmission featured six forward gears, offering a good balance between performance and fuel economy.
Driving Characteristics
The 2.0 HDi 16V engine in the C4 Coupe delivered a respectable driving experience. While not overtly sporty, the 136 horsepower and 340 Nm of torque provided ample power for everyday driving and overtaking maneuvers. The six-speed manual transmission allowed drivers to keep the engine in its optimal power band. Compared to the lower-powered 1.6 HDi variants, the 2.0 HDi offered noticeably stronger acceleration and a more relaxed cruising experience. However, it didn’t possess the outright performance of the petrol-powered versions. The gear ratios were tuned for fuel efficiency, meaning the engine didn’t rev as freely as some competitors. The C4 Coupe’s suspension provided a comfortable ride, absorbing bumps and imperfections in the road surface effectively. Steering was precise, though lacking in significant feedback.
Equipment & Trim Levels
The 2.0 HDi 16V FAP trim typically included features such as air conditioning, power windows, central locking, and an RDS radio. Higher trim levels, often denoted by names like “Exclusive” or “Sport,” added features like alloy wheels, automatic headlights and wipers, a multi-function steering wheel, and upgraded interior trim. Interior upholstery was generally cloth, with options for leather available on higher-spec models. Optional extras included a sunroof, parking sensors, and a more advanced audio system.
Chassis & Braking
The C4 Coupe utilized an independent suspension system on both the front and rear axles. The front suspension employed McPherson struts with a coil spring and anti-roll bar, while the rear featured an independent coil spring setup. This configuration provided a good balance between ride comfort and handling. Braking duties were handled by ventilated discs on the front wheels and solid discs on the rear. ABS (Anti-lock Braking System) was standard, enhancing safety during emergency braking situations. The chassis was designed to provide a stable and predictable driving experience, prioritizing comfort over outright sportiness.
Market Reception & Comparison
The Citroën C4 Coupe 2.0 HDi 16V FAP was generally well-received by automotive critics. It was praised for its stylish design, comfortable ride, and fuel-efficient engine. However, some reviewers noted that the interior quality wasn’t quite as refined as some of its competitors, such as the Volkswagen Golf or Audi A3. Compared to the 1.6 HDi version, the 2.0 HDi offered significantly improved performance, but at a slightly higher price point and with marginally increased fuel consumption. The petrol-powered variants provided more spirited acceleration, but at the expense of fuel economy.
Legacy
The DW10BTED4 engine, in its various iterations, proved to be a durable and reliable powerplant. The C4 Coupe 2.0 HDi 16V FAP, when properly maintained, can offer many years of reliable service. However, like all diesel engines, it’s susceptible to issues related to the fuel injection system and the Diesel Particulate Filter (FAP). Regular servicing, including oil changes and FAP regeneration, is crucial for long-term reliability. On the used car market, these C4 Coupes represent a relatively affordable and practical option, offering a good blend of style, comfort, and fuel efficiency. The FAP system can be a potential source of expense for new owners, so a thorough inspection before purchase is recommended.
