A WIDE RANGE OF ADVANCED TECHNOLOGY
POWERPLANTS
The C4 is available with a diversified engine
range from launch. The offering is organised around
five petrol engines, including the new 143 bhp 2.0i
recently introduced on the C5, and three HDi diesel
engines developed through the cooperation project
with Ford. They include the HDi 92 – fitted for the
first time on a PSA Peugeot Citroën vehicle – and
the new HDi 110 and HDi 138 recently introduced in
the Citroën range.
FIVE PETROL ENGINES FROM LAUNCH
Five petrol engines are available: the 1.4i 16V (90
bhp DIN), the 1.6i 16V (110 bhp DIN), the 2.0i 16V
(138 bhp DIN), the new 2.0i 16V (143 bhp DIN) recently
introduced on the C5 and available with the C4 Saloon,
and the 2.0i 16V (180 bhp DIN), installed on a Citroën
vehicle Рthe C4 Coup̩ Рfor the first time. All the
engines feature a cylinder head with a double overhead
camshaft, four valves per cylinder and a motor-driven
throttle, controlled electrically by the engine
control unit. All the engines are equipped with a
five-speed manual gearbox, except for the 143 bhp 2.0i
16V engine, which is coupled with an automatic
gearbox. The 110 bhp 1.6i 16V engine is also available
with an automatic gearbox.
The 1.4i 16V engine is the entry-level model.
It develops 65 kW EEC (90 bhp DIN) at 5,250 rpm and
maximum torque of 133 Nm at 3,250 rpm. It features
continuously variable valve timing (VVT) to optimise
filling of the combustion chambers at all engine
speeds. Variable valve timing offers more torque at
low engine speeds. Torque of 118 Nm – 90% of maximum
torque – is available from 1,800 rpm, thus
contributing to the respect of the Euro IV emission
standard. The angular variation with respect to
crankshaft timing is managed by the engine control
unit, in line with the engine oil temperature, engine
load and speed.
This engine also features a stiffened cylinder block
to meet high standards of acoustic comfort. Fuel
consumption is low (6.4 l/100 km over a standard
combined cycle), and emissions satisfy the future Euro
IV standard.
The 1.6i 16V engine develops 80 kW EEC (110
bhp DIN) at 5,800 rpm and maximum torque of 147 Nm at
4,000 rpm. Highly responsive from the lowest engine
speeds, this engine offers torque of 132 Nm – 90% of
the maximum amount – from 2,000 rpm. This mid-range
engine strikes an excellent balance between
performance and fuel consumption in combined use (7.1
l/100 km over a standard combined cycle).
The 2.0i 16V engine develops 100 kW EEC (138
bhp DIN) at 6,000 rpm with torque of 190 Nm at 4,100
rpm. The high engine torque available from low engine
speeds ensures a smooth response to driver input. This
engine offers torque of 165 Nm from 2,000 rpm, almost
87% of the maximum torque available.
The power of the engine combined with the strong,
steady increase in engine speed make the C4 138 bhp
2.0i 16V a pleasant and relaxing drive, offering
superior responsiveness and acoustics.
The 2.0i 16V engine is also available with
the C4 Saloon, in a version offering output of 103 kW
EEC (143 bhp DIN) at 6,000 rpm. It is coupled with an
automatic gearbox. Recently introduced on the C5, this
new version of the 2.0i 16V engine offers maximum
torque of 200 Nm at 4,000 rpm. It features
continuously variable valve timing (VVT) to optimise
filling of the combustion chambers at all engine
speeds. This engine offers torque of 170 Nm from 2,000
rpm, almost 85% of the maximum torque available.
It also meets the requirements of the Euro IV
emission standard.
The 2.0i 16V engine, developing 130 kW EEC
(180 bhp DIN) at 7,000 rpm is the most powerful engine
in the range. The C4 Coupé is the first Citroën
vehicle to offer this engine. This engine combines
dynamic driving thrills with a high level of safety
and daily comfort of use. Maximum torque is 202 Nm at
4,750 rpm. On this engine, the intake camshaft is also
equipped with a continuously variable valve timing
system. This characteristic makes for a powerful,
responsive engine.
THREE DIESEL ENGINES OFFERING EXCEPTIONAL PERFORMANCE
AND FUEL CONSUMPTION
The C4’s three HDi engines are all equipped with
second-generation common-rail. The 1.6 HDi 92 bhp is
making its debut on a PSA Peugeot Citroën Group
vehicle, while the new HDi 110 and HDi 138 engines
were recently introduced in the Citroën range.
The characteristics and performance of these compact,
low-weight engines are exceptional: driving pleasure,
reduced fuel consumption and pollutant emissions are
combined with acoustic comfort and vibration control.
The engines are also remarkable for their verve, and
for the temporary torque increase of 20 Nm made
available by the overboost function, which is present
on the two most powerful versions.
The HDi 138 engine is coupled with the six-speed
manual gearbox, recently introduced on the C5.
The new 1.6 HDi 16V engine develops 66 kW EEC
(92 bhp DIN) at 4,000 rpm and torque of 215 Nm at
1,750 rpm. Based on the HDi 110, this “all aluminium”
engine is making its debut in the Citroën range. With
low fuel consumption (4.7 l/100 km over a standard
combined cycle) and CO2 emissions of just
125 g/km, this engine satisfies the Euro IV
standard.
The 1.6 HDi engine is also available in a
version offering output of 80 kW EEC (110 bhp DIN) at
4,000 rpm, introduced on the Xsara Picasso in February
2004. It supplies maximum torque of 240 Nm at 1,750
rpm. Torque can be increased to 260 Nm at 1,750 rpm on
the three highest gears, thanks to the overboost
function.
For strong bursts of acceleration, the overboost
function kicks in, delivering up to 20 Nm of
additional torque by increasing the fuel injection
rate. This new engine therefore combines a fast
response with a linear increase in power, and
excellent acceleration at low engine speeds.
The HDi 110 features a second-generation injection
system delivering injection pressure of 1,650 bars,
controlled by piezoelectric-type injectors. A
variable-geometry turbocharger enhances driving
pleasure and performance. This engine makes full use
of the potential offered by the common-rail system
with its multiple injection technology and the
enhanced management of fuel injection into each
cylinder, providing four injections per engine cycle:
• two pilot injections to reduce combustion noise,
• two main injections to reduce nitrogen oxide
emissions at source.
When it is equipped with the particulate filter, two
additional postinjections improve the regeneration
efficiency.
As a result of its low fuel consumption – 4.7 l/100
km over a standard combined cycle – and its 60-litre
tank, this engine offers a range of more than 1,200
km. CO2 emissions are also very low, at 125
g/km.
The Euro IV version, available in some countries from
the launch of the C4, is equipped with the diesel
particulate filter system (DPFS), which traps and
destroys particulates.
The 2.0 HDi engine complies with the Euro IV
standard and is coupled with the diesel particulate
filter system (DPFS). It develops 100 kW EEC (138 bhp
DIN) at 4,000 rpm. Offering maximum torque of 320 Nm
at 2,000 rpm, it also features an overboost function
that raises torque temporarily to 340 Nm. This new
engine is coupled with a six-speed manual gearbox
already available with the C5. The HDi 138, like the
HDi 110, features a second-generation injection system
and a variable-geometry turbocharger.
