2008-2009 Citroen C5 II (Phase I ) 2.2 HDi Biturbo (170 Hp) FAP

The Citroën C5 II 2.2 HDi Biturbo, produced between 2008 and 2009, represented a high-performance diesel offering within the second generation of Citroën’s large family car. Positioned as a premium variant, it aimed to deliver a blend of comfort, refinement, and strong performance, appealing to drivers seeking a sophisticated and capable saloon. This model falls within the Phase I update of the C5 II (designated X7), built on the PSA Group’s Platform 2. The 2.2 HDi Biturbo was a flagship engine option, offering significantly more power than the base diesel models and competing with premium German saloons in terms of performance.

Technical Specifications

INTRODUCTION

The Citroën C5 II 2.2 HDi Biturbo, launched in 2008 as part of the Phase I refresh of the C5 II, was a significant offering in the large family car segment. Built on the PSA Group’s Platform 2, shared with the Peugeot 607, this variant aimed to provide a compelling alternative to established German rivals like the Audi A6 and BMW 5 Series. The “Biturbo” designation indicated the presence of two turbochargers, enhancing both power and torque output compared to single-turbo diesel engines in the C5 II range. This model year represented a transitional period for the C5 II, with subtle styling updates and improvements to interior trim and technology.

Powertrain & Engine Architecture

The heart of the C5 II 2.2 HDi Biturbo is the 4HT DW12BTED4 engine, a 2.2-liter inline-four cylinder diesel. This engine utilizes a common rail direct injection system, delivering fuel at extremely high pressure for optimized combustion. The key feature is its twin-turbocharger setup. A smaller turbocharger provides boost at low engine speeds, minimizing turbo lag and improving responsiveness, while a larger turbocharger takes over at higher speeds to deliver peak power. The engine also incorporates an intercooler to cool the compressed air, further enhancing performance. The engine produces 170 horsepower at 4000 rpm and a substantial 370 Nm (272.9 lb-ft) of torque at just 1500 rpm. The engine features a double overhead camshaft (DOHC) valvetrain with four valves per cylinder. The engine is transversely mounted at the front of the vehicle, driving the front wheels.

Driving Characteristics

The 2.2 HDi Biturbo offered a noticeably more engaging driving experience than the lower-powered diesel variants of the C5 II. The twin-turbo setup provides strong acceleration, with the readily available torque making overtaking and highway cruising effortless. While not a sports saloon, the C5 II 2.2 HDi Biturbo felt composed and stable at higher speeds. The six-speed manual transmission, standard on this model, allows for precise gear changes and helps to keep the engine in its optimal power band. Compared to the 1.6 HDi or 2.0 HDi models, the Biturbo variant offered a significant performance upgrade, but at the expense of slightly increased fuel consumption. The ride quality, a Citroën hallmark, remained excellent, thanks to the sophisticated suspension system.

Equipment & Trim Levels

The 2.2 HDi Biturbo typically came with a generous level of standard equipment, reflecting its position as a premium trim level. Features included automatic climate control, alloy wheels, front fog lights, rain-sensing wipers, and a CD stereo system. Higher-spec versions often included leather upholstery, parking sensors, and a navigation system. Interior trim was generally well-appointed, with comfortable seats and a functional dashboard layout. Optional extras included a panoramic sunroof, xenon headlights, and a premium audio system.

Chassis & Braking

The C5 II 2.2 HDi Biturbo utilized a double wishbone front suspension and an independent multi-link rear suspension, providing a comfortable and controlled ride. The suspension was tuned to balance handling with ride comfort, making it suitable for long-distance journeys. Braking duties were handled by ventilated discs at the front and solid discs at the rear, with ABS (Anti-lock Braking System) as standard. The steering was hydraulic power-assisted, providing a responsive and precise feel.

Market Reception & Comparison

The Citroën C5 II 2.2 HDi Biturbo was generally well-received by automotive critics, who praised its strong performance, comfortable ride, and spacious interior. However, some reviewers noted that the interior design, while functional, lacked the premium feel of some German rivals. Compared to the 2.0 HDi variant, the Biturbo offered a significant performance boost, but with a slight increase in fuel consumption and a higher purchase price. The 2.2 HDi Biturbo provided a compelling alternative to the petrol-powered C5 models, offering better fuel economy and comparable performance.

Legacy

The 4HT DW12BTED4 engine proved to be a relatively reliable unit, although, like all modern diesel engines, it is susceptible to issues with the diesel particulate filter (DPF) if not properly maintained. Regular servicing and the use of high-quality diesel fuel are essential for long-term reliability. On the used car market, the C5 II 2.2 HDi Biturbo represents a good value proposition, offering a comfortable and well-equipped saloon at an affordable price. However, potential buyers should be aware of the potential maintenance costs associated with a diesel vehicle, particularly the DPF and turbocharger.