Citroen C4 I WRC (2007)
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CITROEN C4 WRC HYmotion4
Acropolis 2009, Sebastian Loeb: see video
Sebastian Loeb in snow: see video
On board with Sebastian Loeb in Monte Carlo 2007 (SS4): see video

Specifications

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Group/Class A/8 Homologation number: A 5702 (01/01 WR, 14/02 WR and 24/03 WR)
Years active 2007 - 2010 Homologation start: 1/1/2007
Homologation end: 31/12/2016
Engine
Type XU7JP4 straight 4cyl, 4 stroke, petrol engine located front transverse
Capacity 1998 cc WRC: x 1.7 = 3396.6 cc
Bore x Stroke (mm) 85.5 x 87.0
Compression ratio 9.0:1
Output power - torgue 315 HP / 5500 rpm 58.0 kgm (569 Nm) / 2750 rpm
Main bearings 5
Materials block: aluminium alloy cylinderhead: aluminium alloy
Cams/valves dual overerhead camshaft (DOHC), belt driven with Variable Valve Timing 4 valves/1cyl. - 16 valves
Aspiration Garrett/Allied Signal TR30R watercooled turbocharger (see below) with 34mm turbo restrictor and catalytic converter fitted, Magnetti Marelli ECB11 electronic fuel MPI
Ignition Magnetti Marelli ECB11 electronic, firing order 1-3-4-2
Cooling system watercooled
Lubrication system oil cooler
Transmission
Type four wheel drive 6-speed sequential, with steering wheel mounted paddles.
Gearbox ratios 1st: /1
2nd: /1
3rd: /1
4th: /1
5th: /1
6th: /1
Diffrential ratio /1 active/hydro-electronically controlled center differential. Limited slip front and rear differentials. 50%-50% F-R torque distribution
Clutch dry carbon triple disk
Chassis-body
Type steel monocoque C4 chassis of PSA PF2 platform with roll-cage. 3 door coupe bodyshell
Front suspension mac pherson strut with lower wishbone, coil springs, Exe-TC telescopic gas shock absorbers, antiroll bar, electronically adjustable
Rear suspension mac pherson strut with lower wishbone, coil springs, Exe-TC telescopic gas shock absorbers, antiroll bar, electronically adjustable
Steering system rack and pinion power assisted
Brakes ventilated disks front/rear,
tarmac: 6 piston calipers all around
gravel: 4 piston calipers all around
dual circuit with servo
Dimensions
length: 4.274 m (168.3 in) width: 1.800 m (70.9 in) height: 1.400 m (55.1 in)
wheelbase: 2.608 m (102.7 in) front track: 1.598 m (62.9 in) rear track: 1.598 m (62.9 in)
Rims - tires tarmac: 8" x 18", gravel: 7" x 15" Goodrich Asphalt BF tyres: 225/40-18, Goodrich Gravel BF tyres: 215/65-15
Weight 1230 kg
Weight/power 4.1 kg/HP
Fuel tank

Garrett TR30R Turbocharger features

T25 type ball bearing cartridge.
The bearing races are made from M50 material and the retainer from silicon-bronze for high temperature capability.
An air-cooled center housing with turbo speed pickup boss.
Thin wall stainless steel turbine housing with V-Band inlet and outlet and attached with a V-Band.
The turbine housing is shielded with an activated carbon cloth heat shield.
Mar-M 247 turbine wheel material is good up to 1050C/1922F turbine inlet temperature.
The compressor housing is attached to a standard back plate with a V-Band.
Billet 5-axis machined aluminum compressor wheel.

Homologation extensions

Homologation number: A 5702
Debut d'Homol. 01.12.2006
Fin : 2015


Results in WRC

Statistics

2007 2008 2009 2010 Total
Works
Races/wins 16/8 15/11 12/7 13/8 56/34
Entries/finishes 32/28 30/27 25/24 26/25 113/104 (92%)
Others
Races/wins /2 /2
Entries/finishes 25/19 32/21 38/32 95/72 (75.8%)
Total WRC results
Races/wins 16/8 15/11 12/7 13/10 56/36
Entries/finishes 32/28 55/46 57/45 64/57 208/176 (84.6%)
Total points 206 244 260 393 1103
(19.696 per race)
(5.303 per entry)

Races

Click here for chassis numbers and number plates on many rally entries worldwide

Works team: Citroën Total W.R.T.

Season
Entry Rally event
Driver
Codriver
Team MON SVE NOR MEX POR ARG ITA GRE FIN DE N.Z ESP TdC JAP IR GB
Sébastien Loeb
Daniel Elena
works 1st 2nd 14th 1st 1st 1st acci dent 2nd 3rd 1st 2nd 1st 1st oil pres sure 1st 3rd
Daniel Sordo
Marc Martí
works 2nd 12th 25th 4th 3rd 6th 3rd 24th dnf eng ine 6th 2nd 3rd 2nd 2nd 5th
Total points
(2nd)
206 19 9 17 18 15 8 9 8 10 14 19 18 9 19 14
Statistics
Others Starts/finishes 32/28 2/2 2/2 2/2 2/2 2/2 2/2 2/1 2/2 2/1 2/1 2/2 2/2 2/2 2/1 2/2 2/2

Information and articles

Article from 4T 469, 10/2009

Original article

2007-citroen-c4-wrc-1_1600x0w.jpg Source
Citroen C4 WRC 2007
863268401_92rh6-L.jpg Source

Drawings

Citroen-C4-WRC.jpg c4.jpg
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