The Citroën C4 I Coupe, specifically the 2.0 HDi 16V (136 hp) FAP Automatic variant produced between 2004 and 2008, represented a key offering in Citroën’s compact coupe lineup. Positioned as a more premium and efficient option within the first generation C4 (2004-2010) range, this model aimed to blend stylish design with the practicality of a five-seater hatchback, albeit with a three-door configuration. It was a significant vehicle for Citroën, embodying their commitment to innovative design and diesel technology within the European market. This particular engine and transmission combination offered a balance between performance and fuel economy, targeting buyers seeking a comfortable and refined driving experience.
Technical Specifications
| Brand | Citroen |
| Model | C4 |
| Generation | C4 I Coupe (Phase I, 2004) |
| Type (Engine) | 2.0 HDi 16V (136 Hp) FAP Automatic |
| Start of production | 2004 |
| End of production | 2008 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 5 |
| Doors | 3 |
| Fuel consumption (urban) | 9.1 l/100 km (25.8 US mpg, 31 UK mpg, 11 km/l) |
| Fuel consumption (extra urban) | 5.1 l/100 km (46.1 US mpg, 55.4 UK mpg, 19.6 km/l) |
| Fuel consumption (combined) | 6.6 l/100 km (35.6 US mpg, 42.8 UK mpg, 15.2 km/l) |
| CO2 emissions | 175 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 11.4 sec |
| Acceleration 0 – 62 mph | 11.4 sec |
| Acceleration 0 – 60 mph | 10.8 sec |
| Maximum speed | 206 km/h (128 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 10.4 kg/Hp, 96.5 Hp/tonne |
| Weight-to-torque ratio | 4.1 kg/Nm, 241.1 Nm/tonne |
| Power | 136 Hp @ 4000 rpm |
| Power per litre | 68.1 Hp/l |
| 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 | 1410 kg (3108.52 lbs.) |
| Max. weight | 1880 kg (4144.69 lbs.) |
| Max load | 470 kg (1036.17 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%) | 1570 kg (3461.26 lbs.) |
| Permitted trailer load with brakes (12%) | 1570 kg (3461.26 lbs.) |
| Permitted trailer load without brakes | 740 kg (1631.42 lbs.) |
| Permitted towbar download | 70 kg (154.32 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, automatic 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 |
INTRODUCTION
The Citroën C4 I Coupe 2.0 HDi 16V FAP Automatic, launched in 2004, was a key variant within the first generation C4 range. Built on the 1HX0/A3 platform, this three-door coupe aimed to offer a more dynamic and stylish alternative to traditional hatchbacks. The 2.0 HDi engine, coupled with an automatic transmission, was positioned as a mid-range offering, appealing to drivers prioritizing comfort and fuel efficiency over outright performance. It represented Citroën’s attempt to capture a segment of the market seeking a sophisticated and practical coupe.
Powertrain & Engine Architecture
At the heart of this C4 Coupe lies the DW10BTED4 engine, a 2.0-liter four-cylinder diesel engine. This engine, commonly found in PSA Group vehicles (Peugeot and Citroën), is characterized by its robust construction and advanced diesel technology. The ‘RHR’ engine code specifically denotes this configuration. It utilizes a common rail direct injection system, delivering fuel at extremely high pressure for optimized combustion and reduced emissions. The 16-valve DOHC (Double Overhead Camshaft) valvetrain further enhances breathing and efficiency. A turbocharger with an intercooler is employed to boost power output and improve torque across the rev range. The FAP (Filtre à Particules) or Diesel Particulate Filter, was a crucial component in meeting increasingly stringent European emission standards. The automatic transmission is a six-speed unit, designed to provide smooth and effortless gear changes. While not known for being particularly sporty, it was geared for comfortable cruising and efficient city driving.
Driving Characteristics
The 2.0 HDi 16V Automatic C4 Coupe delivers a comfortable and refined driving experience. With 136 horsepower and 340 Nm (250 lb-ft) of torque, acceleration is adequate, taking around 11.4 seconds to reach 62 mph. However, it’s not a particularly quick car. The automatic transmission prioritizes smoothness over rapid shifts, making it well-suited for everyday driving. The gear ratios are optimized for fuel economy, meaning the engine doesn’t rev excessively at highway speeds. Compared to the manual transmission versions, the automatic feels slightly less responsive. The higher-output 2.0 HDi variants (often found in Peugeot models) offered noticeably more performance, while the smaller 1.6 HDi engines prioritized fuel economy over power. The C4’s suspension provides a comfortable ride, absorbing bumps and imperfections in the road effectively.
Equipment & Trim Levels
The C4 Coupe 2.0 HDi Automatic typically came equipped with a reasonable level of standard features. These included air conditioning, power windows, central locking, and an RDS stereo system. Higher trim levels, often denoted by names like ‘Exclusive’ or ‘Sensium’, added features such as alloy wheels, automatic headlights and wipers, a multi-function steering wheel, and upgraded interior trim. Interior upholstery was typically cloth, with leather options available as an extra. Optional extras included a panoramic sunroof, satellite navigation, and parking sensors. The dashboard layout was modern for its time, with a centrally mounted instrument cluster.
Chassis & Braking
The C4 Coupe utilizes an independent suspension system on both the front and rear axles. The front suspension employs a McPherson strut setup with a coil spring and anti-roll bar, while the rear features an independent coil spring arrangement. This configuration provides a good balance between ride comfort and handling. Braking duties are handled by ventilated discs on the front wheels and solid discs on the rear. ABS (Anti-lock Braking System) is standard, enhancing safety during emergency braking. The steering is rack and pinion with electric power assistance, providing a light and easy steering feel.
Market Reception & Comparison
The Citroën C4 Coupe 2.0 HDi Automatic received generally positive reviews from automotive critics. It was praised for its comfortable ride, fuel efficiency, and stylish design. However, some critics noted that the automatic transmission could feel sluggish at times, and the overall driving experience wasn’t particularly engaging. Compared to rivals like the Ford Focus Coupe-Cabriolet or the Renault Megane Coupe, the C4 Coupe offered a more practical and spacious interior. The 2.0 HDi engine provided better fuel economy than the petrol alternatives, but the smaller 1.6 HDi offered even greater efficiency, albeit with less power. Reliability was generally good, although the FAP system could require occasional maintenance.
Legacy
The 2.0 HDi 16V engine, in its various iterations, proved to be a durable and reliable powerplant. The automatic transmission, while not without its quirks, generally held up well over time. Today, the C4 Coupe 2.0 HDi Automatic can be found on the used car market at relatively affordable prices. Maintenance costs are reasonable, although potential buyers should be aware of the possibility of FAP-related issues. The car remains a practical and comfortable option for those seeking a stylish and fuel-efficient coupe, representing a distinctive chapter in Citroën’s history.


