Information s

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  Stronger build, confirmed character
  

The new C4 hatchback and coupé have a powerful, energetic, elegant style.

The new bumper features a single air intake and a rounder, beefier bonnet, giving the C4 a strong, robust appearance.

New curves have been added to the grille, with chevrons inspired by the new C5, enhancing the overall elegance. Upmarket versions of the new C4 feature more chrome touches, notably on the front fog lamps, for added style and prestige.

Overall length has been stretched by 15 mm, to a total 4,275 mm for the hatchback and 4,288 for the coupé.
The rear light fixtures on the coupé are now in transparent crystal.
The revamped model is available with three new aluminium wheel styles for a totally renewed offering. The wheels come in 16-inch (Olympie) and 17-inch (Ribalta and Volubilis) versions according to engine, trim level and market.
Three new body colours are available: Récife blue (dynamic trim), and Bourrasque blue and Thorium grey (prestige trims).

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  A modernised interior for enhanced comfort
  

A number of changes have been made to the cabin layout.

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  The central display unit, which now incorporates the rev counter, has been redesigned for more comfort and safety. The translucent instrument cluster, which guarantees optimum contrast whatever the outside light conditions, ensures clear visibility at all times. All the useful driving information can be read safely at a glance on the display unit positioned at the top of the dashboard, as close as possible to the road.
  

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  Citroën has added a new grain to the dashboard and the door panel medallions.
  

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  A new seat fabric in velour is available for the second trim level. New light grey “Lama” leather upholstery is offered on the Exclusive and VTS trim levels.
  

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  The Marque has developed new interior design schemes for the SX (or Comfort), VTR, VTR Pack, SX Pack and Exclusive trim levels.
  

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  HDi diesel engines
  

Citroën’s HDi diesel engines have set the standard in terms of comfort and environmental impact. The C4 range now offers the biggest-ever selection of Airdream® engines. The Airdream® eco-signature covers the 1.6-litre versions (HDi 92, HDi 110 DPFS with a manual gearbox and EGS6) and 2-litre versions with a manual gearbox.

These improvements result from the switch to low-rolling resistance Michelin Energy Saver® tyres, available on 16-inch wheels.

Citroën has reduced the fuel consumption of both the HDi 92 and HDi 110 DPFS powerplants, to 4.4 l/100 km for the HDi 92, 4.4 l/100 km for the HDi 110 DPFS manual and 4.4 l/100 km for the HDi 110 DPFS EGS6 over a combined cycle, on the versions fitted with these tyres. CO₂ emissions have been cut to 117 g/km, 119 g/km and 118 g/km, respectively.

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  New petrol engines
  

The C4 is now available with two petrol engines from the EP family co-developed with the BMW Group. It is the first Citroën to be fitted with engines from this family, namely the VTi 120, replacing the 1.6i 16V, and the THP 150, replacing the 2.0i 16V.

Mainly through better management of intake, the VTi 120 engine offers higher performance and therefore combines more power with low fuel consumption and lower CO₂ emissions.

These characteristics make the car much more pleasurable to drive, with plenty of torque always on hand: 90% or more of maximum torque is available between 2,500 rpm and 5,750 rpm.

The C4 VTi 120 therefore scores a neutral rating in France’s new emissions bonus/surcharge system.

The VTi 120 unit also ships with a four-speed automatic, for fuel consumption of 7 l/100 km and CO₂ emissions of 165 g/km.
VTi stands for “Variable valve lift and Timing Injection”. Fitted with an aluminium block and cylinder head, the 16 valves are driven by intake and exhaust camshafts with continuously variable valve timing.

The intake valves also benefit from a variable raising system that allows the valves’ maximum travel to be adjusted gradually depending on the force applied to the accelerator pedal.

These two features boost engine efficiency, increasing the responsiveness of the vehicle through higher available torque, especially in the most frequent driving conditions (part loads).

C4 THP 150: an outstanding combination of high performance and low fuel consumption and emissions

With direct petrol injection and a turbocharger, the new THP 150 offers both high performance and low consumption.

The new unit develops maximum power of 110 kW (150 bhp EEC) at 5,800 rpm, for maximum torque of 240 Nm from 1,400 rpm to 4,000 rpm. These figures ensure driving pleasure akin to that provided by the HDi diesel units at low and medium engine speeds, with 156 Nm of torque available from as low as 1,000 rpm.
Mated to the new MCM six-speed gearbox (with the same architecture as the EGS6), fuel consumption over a combined cycle is 6.9 l/100 km (for 164 g/km of CO₂), down a full 10% on the previous engine.
The C4 is also available with a four-speed automatic gearbox, for maximum power of 103 kW (140 bhp EEC). Maximum torque remains the same, at 240 Nm at 1,400 rpm. Combined-cycle fuel consumption is 7.7 l/100 km, down 5% compared with the previous powerplant.
The THP 150 engine and the THP 140 version use the same architecture as the VTi 120.

The unit features several technical particularities that give it outstanding performance for an engine of its size. Comparable to the downsizing applied to the Marque’s HDi engines, the technology used for the THP 150 unit brings significant gains over normally-aspirated engines.

Two of these technologies are completely new to the C4 range: direct petrol injection and the use of a turbocharger.
The THP engine (for Turbo High Pressure) features direct sequential injection fed by a high-pressure electronic pump. Linked to a turbocharger, the system has an intake camshaft with continuous variable timing.
The main characteristics of the engine are as follows:
- Direct injection, which combines specific high power with low fuel consumption. This high pressure is obtained via a pump mounted at the end of the intake camshaft. Maximum pressure of 120 bars allows the injectors to spray the mixture directly into the combustion chamber sideways, ensuring uniform distribution. The compression ratio is 10.5 to 1.
- A twin-scroll turbocharger. The particularity of this system is that it groups the gas ducts by pair (cylinders 1-4 and 2-3) in the exhaust manifold. The optimal gas flow combination this provides makes the turbine extremely fast-acting and considerably cuts down on lag time. The turbine can rotate at up to 200,000 rpm, developing pressure limited electronically by the discharge valve to 0.8 bars. Turbocharging is noticeable from 1,000 rpm.
- A cylinder head with two overhead camshafts. The intake camshaft benefits from continuous variable timing, which provides more torque at low engine speeds while reducing fuel consumption and CO₂ emissions.
- An oil pump with throughput regulation, which supplies the right amount of lubrication for optimal functioning and reduces fuel consumption by 1%. This system also features an oil intercooler, fitted in the filter and regulated by a thermostat, for faster heating and excellent temperature management, even during rough handling.
- A crankcase in two parts, with a cylinder casing and a bearing cap casing, in aluminium, for extra stiffness and reduced noise emissions.

More telematics equipment

The telematics equipment on the C4 has been completely revamped to offer new services for driver and passengers.

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  MyWay, a new integrated navigation system with a 7-inch panoramic colour screen is now available at entry level, rounding out the current offering. The system features a radio and MP3/WMA-compatible CD player along with auxiliary RCA sockets in the glovebox for connecting portable media devices. MyWay includes a map of Europe, integrated on SD card media and displayed in 2D or 3D. Traffic conditions are indicated in real time. MyWay also features a Bluetooth® hands-free kit with an information and address book display. Functions are controlled from the fixed-centred controls steering wheel or via the radio.
  

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  The NaviDrive system has been upgraded. It now features a high-resolution (800 x 480 pixels) 7-inch panoramic screen and a USB socket, located on the central console, for MP3 players using the “Mass Storage” system. Portable media players are controlled from the steering wheel or the radio.
  

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  An optional USB Box will be launched at the end of the year for the CD audio system. Two sockets, one USB and one jack, built into the central console can be used to connect portable media players using the Mass Storage system and IAP protocols (iPod and iPhone) and MTP (Microsoft Plays for Sure).
  

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  High-tech equipment that makes all the difference
  

Launched at end-2004, the C4 is still a standard-setter in the segment on innovative equipment.

C4 safety features include:
- Xenon dual-function directional headlamps, which can swivel up to 15° for enhanced lighting in corners,
- front and rear parking assist, with a dashboard display of objects and distances,
- the lane departure warning system, which functions from speeds of 80 km/h to combat drowsiness at the wheel,
- fixed-centred controls steering wheel, which groups all essential driving functions right in front of the driver and features a shape-optimised driver’s airbag for more efficiency,
- laminated side windows, for ultra-low cabin noise and top-level passenger safety,
- hill start assist with the 6-speed electronic gearbox system, which frees up the driver from arduous starts on inclines,
- speed limiter and cruise control, making it easier to respect speed limits.

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  Safe and enjoyable to drive
  

As before, the C4 is first and foremost a real treat to drive. Drivers get exceptional precision and on-road pleasure from the C4’s spot-on steering, with just the right amount of power assistance, and its sophisticated suspension system, featuring judiciously worked springs and shock absorbers.

Visuals available from Citroën’s press website: www.citroen-presse.com