The Citroen C4 II Hatchback 1.6 e-HDI Airdream, produced between 2013 and 2015, represented a significant offering in the European compact car market. Positioned as a fuel-efficient and relatively affordable option within the C4 II range (launched in 2010, based on the PSA PF1 platform), this variant aimed to appeal to buyers prioritizing economy and practicality. The “e-HDI” designation signified Citroen’s implementation of diesel particulate filters and other emissions-reducing technologies, aligning with increasingly stringent European emission standards. This model occupied a mid-range position in the C4 II lineup, slotting below the more powerful petrol and diesel options, and above the base-level trims.
Technical Specifications
| Brand | Citroen |
| Model | C4 |
| Generation | C4 II Hatchback (Phase I, 2010) |
| Type (Engine) | 1.6 e-HDI (114 Hp) Airdream |
| Start of production | 2013 |
| End of production | 2015 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Hatchback |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 5.2 l/100 km (45.2 US mpg, 54.3 UK mpg, 19.2 km/l) |
| Fuel consumption (extra urban) | 4 l/100 km (58.8 US mpg, 70.6 UK mpg, 25 km/l) |
| Fuel consumption (combined) | 4.5 l/100 km (52.3 US mpg, 62.8 UK mpg, 22.2 km/l) |
| CO2 emissions | 117 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 11.3 sec |
| Acceleration 0 – 62 mph | 11.3 sec |
| Acceleration 0 – 60 mph | 10.7 sec |
| Maximum speed | 190 km/h (118.06 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 10.6 kg/Hp, 94.6 Hp/tonne |
| Weight-to-torque ratio | 4.5 kg/Nm, 224.1 Nm/tonne |
| Power | 114 Hp @ 3600 rpm |
| Power per litre | 73.1 Hp/l |
| Torque | 270 Nm @ 1750 rpm (199.14 lb.-ft. @ 1750 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | 9HD DV6C |
| Engine displacement | 1560 cm3 (95.2 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 75 mm (2.95 in.) |
| Piston Stroke | 88.3 mm (3.48 in.) |
| Compression ratio | 16:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 3.75 l (3.96 US qt | 3.3 UK qt) |
| Kerb Weight | 1205 kg (2656.57 lbs.) |
| Max. weight | 1820 kg (4012.41 lbs.) |
| Max load | 615 kg (1355.84 lbs.) |
| Trunk (boot) space – minimum | 380 l (13.42 cu. ft.) |
| Trunk (boot) space – maximum | 1183 l (41.78 cu. ft.) |
| Fuel tank capacity | 60 l (15.85 US gal | 13.2 UK gal) |
| Permitted trailer load with brakes (8%) | 1550 kg (3417.17 lbs.) |
| Permitted trailer load without brakes | 670 kg (1477.1 lbs.) |
| Permitted towbar download | 75 kg (165.35 lbs.) |
| Length | 4329 mm (170.43 in.) |
| Width | 1789 mm (70.43 in.) |
| Width including mirrors | 2050 mm (80.71 in.) |
| Height | 1489-1502 mm (58.62 – 59.13 in.) |
| Wheelbase | 2608 mm (102.68 in.) |
| Front track | 1522-1536 mm (59.92 – 60.47 in.) |
| Rear (Back) track | 1515-1529 mm (59.65 – 60.2 in.) |
| Front overhang | 935 mm (36.81 in.) |
| Rear overhang | 786 mm (30.94 in.) |
| Drag coefficient (Cd) | 0.30 |
| Minimum turning circle (turning diameter) | 10.7 m (35.1 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 | 6 gears, manual transmission |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Semi-independent, coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Tires size | 205/55 R16; 225/45 R17 |
| Wheel rims size | 16; 17 |
Powertrain & Engine Architecture
The heart of the C4 II 1.6 e-HDI Airdream is the PSA Group’s 9HD DV6C engine. This 1.6-liter, inline-four cylinder diesel engine utilizes a common-rail direct injection system, delivering fuel at extremely high pressure for optimized combustion. The engine benefits from a turbocharger with an intercooler, boosting power output and improving torque delivery. The DV6 engine family is known for its robust construction and relatively simple design, contributing to its longevity. The “e-HDI” designation indicates the inclusion of a diesel particulate filter (DPF) to reduce harmful emissions, and the Airdream technology focused on aerodynamic improvements and lightweight materials to further enhance fuel efficiency. The engine produces 114 horsepower at 3600 rpm and 270 Nm (199 lb-ft) of torque at 1750 rpm. This torque figure, available at relatively low engine speeds, is a key characteristic of modern diesel engines, providing strong pulling power for everyday driving. The engine is transversely mounted in the front of the vehicle, driving the front wheels. The standard transmission for this variant was a 6-speed manual gearbox.
Driving Characteristics
The 1.6 e-HDI Airdream, paired with the 6-speed manual transmission, offered a comfortable and economical driving experience. While not a performance-oriented model, the engine provided adequate power for typical commuting and highway driving. The relatively high torque output meant that the car felt responsive in most situations, with minimal need for aggressive gear changes. The 6-speed gearbox allowed for efficient cruising at highway speeds, keeping engine revs low and maximizing fuel economy. Compared to the more powerful 2.0-liter HDi variants, the 1.6 e-HDI felt less eager to accelerate, but it compensated with significantly better fuel consumption. The manual transmission provided more driver engagement than the optional automated manual transmission available on some C4 II models.
Equipment & Trim Levels
The 1.6 e-HDI Airdream typically came equipped with a reasonable level of standard features. These included air conditioning, power windows, power mirrors, a CD/radio system with USB connectivity, and ABS brakes. Higher trim levels added features such as alloy wheels, automatic headlights and wipers, a multi-function steering wheel, and upgraded interior trim. The Airdream models often featured unique badging and aerodynamic enhancements. Optional extras included a panoramic sunroof, satellite navigation, and parking sensors.
Chassis & Braking
The C4 II utilized a McPherson strut front suspension and a semi-independent torsion beam rear suspension. This setup provided a good balance between ride comfort and handling. The front brakes were ventilated discs, while the rear brakes were solid discs. ABS (Anti-lock Braking System) was standard. The suspension was tuned for comfort, prioritizing a smooth ride over sporty handling. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering.
Market Reception & Comparison
The Citroen C4 II 1.6 e-HDI Airdream was generally well-received by automotive critics for its fuel efficiency and practicality. It was often praised for its comfortable ride and spacious interior. However, some reviewers noted that the engine could feel underpowered when fully loaded or driving uphill. Compared to competitors like the Volkswagen Golf and Ford Focus, the C4 II offered a more distinctive styling and a focus on comfort. The 1.6 e-HDI variant consistently achieved impressive fuel economy figures, making it an attractive option for budget-conscious buyers. Reliability was generally good, although the DPF system required periodic maintenance to prevent clogging.
Legacy
The 1.6 e-HDI engine, and the C4 II variant featuring it, proved to be a popular choice in the European market. The engine’s robust design and relatively simple construction contributed to its long-term reliability. On the used car market, these models continue to offer good value for money, particularly for buyers seeking an economical and practical hatchback. However, potential buyers should be aware of the maintenance requirements of the DPF system and ensure that it has been properly serviced. The C4 II 1.6 e-HDI Airdream remains a testament to Citroen’s commitment to fuel efficiency and comfortable motoring.
