The Citroën C4 III Phase II, specifically the 1.2 (145 hp) Mild Hybrid e-DCS variant, represents a significant evolution in Citroën’s compact vehicle lineup. Introduced in March 2025, this model builds upon the foundation of the C4 III generation (launched in 2020), blending the practicality of a hatchback with the elevated driving position and styling cues of an SUV. Positioned as a mid-range offering within the C4 lineup, it aims to provide a balance between fuel efficiency, performance, and modern technology. The C4 III utilizes the Stellantis CMP (Common Modular Platform) which allows for flexible powertrain options and a focus on lightweight construction.
Technical Specifications
| Brand | Citroen |
| Model | C4 |
| Generation | C4 III (Phase II, 2024) |
| Type (Engine) | 1.2 (145 Hp) Mild Hybrid e-DCS |
| Start of production | March, 2025 |
| Powertrain Architecture | MHEV (Mild Hybrid Electric Vehicle) |
| Body type | Coupe, SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption at Low speed (WLTP) | 4.3 l/100 km (54.7 US mpg, 65.7 UK mpg, 23.3 km/l) |
| Fuel consumption at Medium speed (WLTP) | 4.2 l/100 km (56 US mpg, 67.3 UK mpg, 23.8 km/l) |
| Fuel consumption at high speed (WLTP) | 4.3-4.4 l/100 km (54.7 – 53.5 US mpg, 65.7 – 64.2 UK mpg, 23.3 – 22.7 km/l) |
| Fuel consumption at very high speed (WLTP) | 5.6 l/100 km (42 US mpg, 50.4 UK mpg, 17.9 km/l) |
| Combined fuel consumption (WLTP) | 4.7-4.8 l/100 km (50 – 49 US mpg, 60.1 – 58.9 UK mpg, 21.3 – 20.8 km/l) |
| CO2 emissions (WLTP) | 106-108 g/km |
| 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 | 210 km/h (130.49 mph) |
| Emission standard | Euro 6e |
| Weight-to-power ratio | 9.2 kg/Hp, 109.2 Hp/tonne |
| Weight-to-torque ratio | 5.8 kg/Nm, 173.2 Nm/tonne |
| Gross battery capacity | 0.89 kWh |
| Battery voltage | 48 V |
| Battery technology | Lithium-ion (Li-Ion) |
| Battery location | Under the front seats |
| Electric motor power | 21 Hp @ 4264 rpm |
| Electric motor Torque | 51 Nm (37.62 lb.-ft.) |
| Electric motor location | Integrated into the transmission |
| Electric motor type | Synchronous |
| System power | 145 Hp |
| System torque | 230 Nm @ 1750 rpm (169.64 lb.-ft. @ 1750 rpm) |
| Power | 136 Hp @ 5500 rpm |
| Torque | 230 Nm @ 1750 rpm (169.64 lb.-ft. @ 1750 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | HN09 |
| Engine displacement | 1199 cm3 (73.17 cu. in.) |
| Number of cylinders | 3 |
| Engine configuration | Inline |
| Cylinder Bore | 75 mm (2.95 in.) |
| Piston Stroke | 90.5 mm (3.56 in.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 3.5 l (3.7 US qt | 3.08 UK qt) |
| Kerb Weight | 1328-1400 kg (2927.74 – 3086.47 lbs.) |
| Max. weight | 1805 kg (3979.34 lbs.) |
| Max load | 405-477 kg (892.87 – 1051.6 lbs.) |
| Trunk (boot) space – minimum | 380 l (13.42 cu. ft.) |
| Trunk (boot) space – maximum | 1250 l (44.14 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Permitted trailer load with brakes (12%) | 1000 kg (2204.62 lbs.) |
| Permitted trailer load without brakes | 700 kg (1543.24 lbs.) |
| Permitted towbar download | 61 kg (134.48 lbs.) |
| Length | 4350 mm (171.26 in.) |
| Width | 1800 mm (70.87 in.) |
| Width with mirrors folded | 1834 mm (72.2 in.) |
| Width including mirrors | 2032 mm (80 in.) |
| Height | 1525 mm (60.04 in.) |
| Wheelbase | 2670 mm (105.12 in.) |
| Front track | 1545-1560 mm (60.83 – 61.42 in.) |
| Rear (Back) track | 1545-1560 mm (60.83 – 61.42 in.) |
| Front overhang | 870 mm (34.25 in.) |
| Rear overhang | 810 mm (31.89 in.) |
| Drivetrain Architecture | Front wheel drive. MHEV. ICE and electric motor drive the front wheels. |
| Drive wheel | Front wheel drive |
| Number of gears and type of gearbox | 6 gears, automatic transmission e-DCS |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Coil spring, Torsion |
| 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 | 215/65 R16 98H; 195/60 R18 96H |
| Wheel rims size | 16; 18 |
Powertrain & Engine Architecture
At the heart of the C4 III 1.2 Mild Hybrid e-DCS lies the HN09, a 1.2-liter, three-cylinder turbocharged gasoline engine. This engine produces 136 horsepower at 5500 rpm and 230 Nm (169.64 lb-ft) of torque at 1750 rpm. The “Mild Hybrid” designation indicates the presence of a 48-volt electrical system and a small electric motor (21 hp and 51 Nm of torque) integrated with the transmission. This system provides a power boost during acceleration and allows for regenerative braking, capturing energy normally lost during deceleration to recharge the 48V battery. The battery is located under the front seats. The engine utilizes direct fuel injection and a turbocharger with an intercooler to enhance efficiency and power output. The e-DCS (electric Dual-Clutch System) automatic transmission is a six-speed unit designed to work seamlessly with the mild-hybrid system, offering smooth gear changes and contributing to improved fuel economy.
Driving Characteristics
The 1.2-liter Mild Hybrid powertrain delivers a respectable driving experience. Acceleration from 0 to 60 mph takes approximately 7.6 seconds, and 0-100 km/h in 8 seconds, making it competitive within its class. While not as brisk as higher-powered C4 variants, the electric motor provides a noticeable boost during initial acceleration, improving responsiveness. The e-DCS transmission offers quick and smooth shifts, enhancing the overall driving feel. The mild-hybrid system contributes to a quieter and more refined driving experience, particularly during low-speed maneuvers where the electric motor can operate independently. Compared to a manual transmission version of the same engine, the e-DCS prioritizes convenience and ease of use, but may slightly reduce fuel economy in certain driving conditions.
Equipment & Trim Levels
The C4 III 1.2 Mild Hybrid e-DCS typically comes standard with features such as a touchscreen infotainment system with Apple CarPlay and Android Auto compatibility, automatic climate control, and a suite of advanced driver-assistance systems (ADAS) including lane departure warning, automatic emergency braking, and traffic sign recognition. Interior upholstery is generally cloth, with options for upgraded materials. Higher trim levels may include features like a larger touchscreen, a digital instrument cluster, and premium audio systems. Optional extras often include a panoramic sunroof, adaptive cruise control, and parking assist.
Chassis & Braking
The C4 III utilizes a McPherson strut front suspension and a torsion beam rear suspension. This setup provides a comfortable ride quality while maintaining reasonable handling characteristics. The front brakes are ventilated discs, while the rear brakes are solid discs. ABS (Anti-lock Braking System) is standard, along with electronic stability control. The steering is electric power-assisted, offering a light and responsive feel.
Market Reception & Comparison
The Citroën C4 III 1.2 Mild Hybrid e-DCS has been generally well-received by automotive critics for its fuel efficiency, comfortable ride, and modern features. It offers a compelling alternative to traditional gasoline-powered compact cars, particularly for drivers seeking lower running costs. Compared to the more powerful C4 variants (such as those with larger gasoline engines), the 1.2 Mild Hybrid prioritizes economy over outright performance. Its fuel consumption figures of 4.7-4.8 l/100 km (50-49 US mpg) are competitive within its segment. Reliability reports suggest that the HN09 engine and e-DCS transmission are generally reliable, but regular maintenance is crucial to ensure optimal performance.
Legacy
The Citroën C4 III 1.2 Mild Hybrid e-DCS represents a step towards electrification in Citroën’s lineup. While not a fully electric vehicle, the mild-hybrid system provides a tangible improvement in fuel efficiency and reduces emissions. In the used car market, these models are becoming increasingly popular due to their low running costs and modern features. The long-term reliability of the powertrain is expected to be good, provided that the vehicle is properly maintained. As consumer demand for fuel-efficient vehicles continues to grow, the C4 III 1.2 Mild Hybrid e-DCS is likely to remain a relevant and desirable option for years to come.
