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World Rally Car
World Rally Car
is a racing automobile built to the specification set by the FIA, the international motorsports governing body and compete in the outright class of the World Rally Championship
World Rally Championship
(WRC). The WRC specifications were introduced by the FIA in 1997.[1]

Contents

1 Regulations

1.1 1997–2010 1.2 2011–2016 1.3 2017

2 Cars 3 References 4 External links

Regulations[edit] 1997–2010[edit]

A Subaru
Subaru
Impreza WRC2006 being prepared by Prodrive

Between 1997 and 2010, the regulations mandated that World Rally Cars must have been built upon a production car with a minimum production run of 2500 units. A number of modifications could be made including increasing the engine displacement up to 2.0L, forced induction (including an anti-lag system), addition of four wheel drive, fitment of a sequential gearbox, modified suspension layout and attachment points, aerodynamic body modifications, weight reduction to a minimum of 1230 kg and chassis strengthening for greater rigidity. The maximum width was set at 1770 mm while front and rear tracks shouldn't exceed 1550 mm. Unlike the requirements for the preceding Group A
Group A
cars, manufacturers were no longer required to build "homologation specials" in order to meet approval. The base model did not need to have all the characteristics of the WRC car, as evidenced from cars such the Peugeot
Peugeot
206, 307, Citroën Xsara
Citroën Xsara
and Škoda Fabia, which during this period had no road car variant with a turbocharged petrol engine or four wheel drive. One of the requirements was a minimum length of 4000 mm; the standard Peugeot 206
Peugeot 206
had an overall length of 3835 mm and Peugeot
Peugeot
had to produce at least 2500 units featuring extended bumpers to comply with the required dimensions.[2] To limit power, all forced induction cars were fitted with a 34 mm diameter air restrictor before the turbocharger inlet, limiting the air flow to about 10 cubic meters per minute. The restriction was intended to limit power output to 300 hp although some WRC engines were believed to produce around 330–340 hp.[citation needed] Engine development did not focus on peak power output but towards producing a very wide powerband (or power curve). Typically, power output in excess of 300 hp was available from 3000 rpm to the 7500 rpm maximum, with a peak of 330–340 hp at around 5500 rpm. At 2000 rpm (the engine idle speed in "stage" mode) power output was slightly above 200 hp.[3] By 2004, the best cars had ABS, electronic clutch control, paddle shift, traction control, three active differentials, ride height control with GPS, electronic dampers and active suspension.[4] For 2005 the maximum width of the WRC cars was increased from 1770 mm to 1800 mm.[5] In an attempt to cut costs, since 2006 new regulations required mechanical front and rear differentials, while the central differential remained active. Active suspension and water injections were also prohibited. Cars entered by a manufacturer had to be equipped with the same engine for two rallies; further limitations were imposed on the changing of some parts, including suspension, steering, turbochargers and gearboxes. 2011–2016[edit] Starting in 2011, rules for WRC cars changed to be more restrictive. Now regulations were derived from Super 2000
Super 2000
cars with a different aerodynamic kit. The cars were smaller models (there was no longer a minimum 4m length), with a 1600 cm3 direct injection turbo-charged engine with a 33 mm diameter air restrictor and a maximum pressure of 2.5 bar absolute (this will limit torque to about 400 N.m or less[6]). Exotic materials (titanium, magnesium, ceramics and composite) were forbidden except when present in the base model. Carbon fibre
Carbon fibre
and aramid fibre were very restricted ("only one layer of fabric is used and is affixed to the visible face of the part"), except for bodywork's side protections where multiple layers of aramid fibre are allowed. The gear changes must be made with a mechanical system, so the paddle shifters were not allowed. However the system was re-allowed in 2015. There was no center differential (earlier it used to be 3 differentials, with a center/3rd differential included), but the new regulation allows only front and rear axle differential (eliminating the center differential to reduce cost)[citation needed], and they must be mechanical, without electronic control or hydraulic or viscous systems (from 2006 to 2010 the center differential and previously all three could be active[7]). Minimum weight is 1200 kg empty and 1350 kg with driver and co-driver (in both cases with only one spare wheel).[8] 2017[edit] The 1.6 L turbo-charged engine was retained in the 2017 World Rally Car regulations, but the turbo restrictor diameter was increased from 33 mm to 36 mm, increasing the engine's power output from 310 bhp (223.7 kW) to 380 bhp (283.4 kW). Minimum vehicle weight was decreased by 25 kg. Manufacturers are also given more freedom to maximise aerodynamic performance, large brake cooling ducts in fairings forming enlarged wheel arches, and are allowed to use electronically-controlled active centre differentials, while the front and rear differentials remain mechanical. While 2011 specification World Rally Cars will be allowed to compete in 2017, the new World Rally Cars are allowed for use by manufacturers' teams only. Cars[edit]

Citroën Xsara
Citroën Xsara
WRC

Citroën
Citroën
C4 WRC

Citroën
Citroën
DS3 WRC

Citroën
Citroën
C3 WRC

Ford Escort WRC

Ford Focus RS WRC

Ford Fiesta RS WRC

Ford Fiesta WRC

Hyundai Accent WRC

Hyundai i20 WRC

Hyundai i20 Coupe WRC

Mini John Cooper Works WRC

Mitsubishi Lancer Evolution WRC

Mitsubishi Lancer WRC

Peugeot 206
Peugeot 206
WRC

Peugeot 307
Peugeot 307
WRC

SEAT
SEAT
Córdoba WRC

Škoda Octavia
Škoda Octavia
WRC

Škoda Fabia
Škoda Fabia
WRC

Subaru
Subaru
Impreza WRC

Suzuki
Suzuki
SX4 WRC

Toyota
Toyota
Corolla WRC

Toyota
Toyota
Yaris WRC

Volkswagen
Volkswagen
Polo R WRC

Manufacturer Car From To

Citroën Xsara WRC 2001 2006

C4 WRC 2007 2010

DS3 WRC 2011 2016

C3 WRC 2017 -

/ Ford Escort WRC 1997 1998

Focus RS WRC 1999 2010

Fiesta RS WRC 2011 2016

Fiesta WRC 2017 -

Hyundai Accent WRC 2000 2003

i20 WRC 2014 2016

i20 Coupe WRC 2017 -

MINI John Cooper Works WRC 2011 2012

Mitsubishi Lancer Evolution WRC 2001 2002

Lancer WRC 2004 2005

Peugeot 206 WRC 1999 2003

307 WRC 2004 2005

SEAT Córdoba WRC 1998 2000

Škoda Octavia WRC 1999 2003

Fabia WRC 2003 2005

Subaru Impreza WRC 1997 2008

Suzuki SX4 WRC 2007 2008

Toyota Corolla WRC 1997 1999

Yaris WRC 2017 -

Volkswagen Polo R WRC 2013 2016

References[edit]

^ "WRC History". Suzuki
Suzuki
Sport.  ^ " Peugeot
Peugeot
launches the 206 GT". 5 May 1999.  ^ " Subaru
Subaru
Rally Engine – Developing a World Rally Car
World Rally Car
power plant", page 23-30, Race Engine Technology, issue 005, 2004 ^ "Ford technical director explains low-tech approach in WRC cars". theinquirer.net. Incisive Business Media. 2011.  ^ "Mitsubishi Lancer WRC05". Mitsubishi Motors. Retrieved 30 January 2018.  ^ For instance, officially the Citroën DS3 WRC
Citroën DS3 WRC
has 350 N⋅m (35.7 kgf⋅m) at 3,250rpm. ^ "Rally of Turkey 2010 – Glossary". Retrieved 2011-02-21.  ^ http://argent.fia.com/web/fia-public.nsf/92B8777DD7239078C1257802003B3157/$FILE/255A_2011.pdf

External links[edit]

Wikimedia Commons has media related to World Rally Championship
World Rally Championship
cars.

The cars at WRC.com

v t e

World Rally Championship

WRC seasons

Group 4

ICM (1970–72) 1973 1974 1975 1976 1977 1978 1979 1980 1981

Group B

1982 1983 1984 1985 1986

Group A

1987 1988 1989 1990 1991 1992 1993 1994 1995 1996

World Rally Car

1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018

Support categories

WRC-2

2013 2014 2015 2016 2017 2018

WRC-3

2013 2014 2015 2016 2017 2018

Junior WRC

2013 2014 2015 2016 2017 2018

DMACK Trophy

2014 2015 2016

2-L WRC

1993 1994 1995 1996 1997 1998 1999

v t e

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Formula racing

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Swift Hyundai

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Defunct one-make formulae

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