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explanation of categories

Le Mans Prototypes

Le Mans Prototypes are either open or closed cockpit cars with no production minimum required. Generally produced specially for the 24 Hours du Mans, but also for FIA WEC Endurance Championship / ELMS / ALMS races, these cars are developed exclusively for on-track competitions, fulfilling the requirements of the Automobile Club de l’Ouest technical regulations. Because of their performances and level of technological development, they have a star status within Endurance Racing.

Prototypes are divided into two categories:

  • LMP1 - destined more to Manufacturers
  • LMP2 - destined only to teams independent of manufacturers and/or engine suppliers.




"LE MANS" PROTOTYPE 1 category includes :

  • "LE MANS" PROTOTYPE 1 Hybrid: with Energy Recovery System (ERS).
  • "LE MANS" PROTOTYPE 1 : with no Energy Recovery System (ERS) reserved only for privateers.

The LMP1 Private Teams category is reserved exclusively for independent private teams.  A team that is independent of a manufacturer means a team that does not benefit from any support from a manufacturer other than for the single supply of engines, services relating to these engines or commercial support. Any support from a manufacturer relating to the chassis or to chassis systems is prohibited. It is understood that traction control is considered as a chassis system.


Engine is free except following restrictions:

  • Only Petrol or Diesel 4 stroke engines with reciprocating pistons are permitted.
  • Engine cubic capacity is free for "LM" P1-Hybrid cars
  • Engine cubic capacity must not exceed 5500 cm3 for "LM" P1 cars.

Number panels

Pantone red 485, with white numbers.

Driver Categories

Bronze drivers are not permitted.


Minimum weight

870 kg for LMP1-Hybrid
850 kg for LMP1

Fuel Tank Capacity

Petrol: 68.3 litres
Diesel: 54.2 litres


Dimensions :

  • Wheelbase: Free but it must be identical to that registered in the Homologation Form.
  • Overall length: 4650 mm maximum.
  • The front overhang is limited to 1000 mm.
  • The rear overhang is limited to 750 mm.
  • Overall width: 1900 mm maximum and 1800mm minimum.
  • Height: No part of the bodywork is permitted to be more than 1050 mm above the reference surface.

Fuel Flow Metering :

Homologated "Fuel Flow Meters" (Technical List n°45) described in Appendix D must be integrated into the fuel system according to the specification included in Appendix D.

A homologated sensor must be fitted which directly measures the fuel pressure in the feed line of the main fuel flow meter.  This signal must be supplied to the FIA data logger.

Fuel Energy per Kilogram :

The fuel energy is the amount of chemical energy contained in one kilogram of fuel. It is calculated from the calorific values given by the official fuel supplier.

Fuel Energy per Lap :

The fuel energy per lap is the total amount of fuel energy contained in the fuel mass allocated for one lap. It is obtained by multiplying the fuel mass allocated for one lap expressed in kilogram by the Fuel Energy per kilogram.

Technology Factor :

The Fuel Technology Factor is a function of the ratio of Diesel over Petrol efficiencies.
The K Technology Factor is a function of Diesel and Gasoline Power Trains Weight and ERS options (See Appendix B).
The Technology Factor is the product of Fuel and K

Technology Factors :

The Fuel Energy per lap allocated for the Diesel engine is result of the Fuel Energy per lap allocated for the Petrol Engine divided by the technology factor.



"LE MANS" PROTOTYPE 2 ("LM" P2) is a racing car with no production minimum required.
Open or closed (*) car, destined only to teams independent of manufacturers and/or engine suppliers.

The cars that may be considered as "factory cars", whose technical characteristics and level of development are clearly not complying with the objectives of the LMP2 regulations may be refused by the Endurance Committee.

The selling price of the complete new car without the engine, but with all available options must not exceed 370 000€. For closed cars, the selling price must not exceed 450.000€.

All projects for the construction of a new car, or evolution of an existing model, must be submitted to the Endurance Committee for approval prior the homologation procedure.



Engine Homologated

Maximum cylinder capacity:

  • Normally aspirated petrol: 5000cc 8 cyl. maximum
  • Turbo/ supercharged petrol: 3200cc 6 cyl. maximum

Number panels

Pantone blue 653, with white numbers.

Driver Categories

A crew of 2 or 3 drivers must include at least one Silver or Bronze driver.


Minimum weight

900 kg
The minimum weight includes the skid block
defined in Article 3.5.6.

Fuel Tank Capacity

75 Litres


Dimensions :

  • Wheelbase: Free but it must be identical to that registered in the Homologation Form.
  • Height : No part of the bodywork is permitted to be more than 1030 mm (*) above the reference surface, except the rear rollover structure fairing that may be 10 mm maximum above the rear rollover structure.
    (*) 1050 mm for LMP2 equiped with a chassis in compliance with the 2014 LMP1 regulations.
  • The front overhang is limited to 1000 mm.
  • The rear overhang is limited to 750 mm (including the rear wing).

Le Mans Grand Touring Endurance

The "Le Mans" Grand Touring Endurance car ("LM" GTE) is a car having an aptitude for sport with 2 doors, 2 or 2+2 seats, opened or closed, which can be used perfectly legally on the open road and available for sale thanks to the dealer network of a manufacturer recognised by the Endurance Committee.

This category includes two groups:

  • A group destined more especially to professional (LMGTE-PRO).
  • A group destined only to amateurs (LMGTE-AM).

In this group only cars having 1 year old or fully in compliance with the specifications of the previous year car - unless specified in these regulations - will be admitted.




Normally aspirated engines: 5500 cc maximum
Turbocharged / Supercharged engines: 4000 cc maximum.

Driver Categories

LMGTE-Pro: The composition of the crews is free.
LMGTE-Am: A crew of 2 or 3 drivers must include at least 1 Bronze and 1 bronze or Silver.


Maximum dimensions:

  • Overall length: 480 cm
  • Front overhang: 125 cm
  • Rear overhang: 110 cm
  • Overall width: 205 cm (excluding rear view mirrors)



Number Panels

LMGTE-Pro: Pantone green 355, with white numbers.
LMGTE-Am: Pantone orange 021C, with white numbers.

Minimum weight

1245 kg. Except for the weighing procedure used during the practice sessions, it is the weight of the car with no driver and no fuel on board.

Fuel Tank Capacity

90 litres

summary of categories



6 Hours of Circuit of the Americas
2015, 19th September

Start in

WEC Timing Partner

Free Practice 1Thu 17th September - 14 h 45
Free Practice 2Thu 17th September - 20 h 00
Free Practice 3Fri 18th September - 10 h 30
Qualifying - LMGTEFri 18th September - 17 h 45
Qualifying - LMPFri 18th September - 18 h 15
RaceSat 19th September - 17 h 00




2015 Classification

184 pts
151 pts
89 pts
Rebellion Racing
54 pts
Rebellion Racing
50 pts
Team Bykolles
25 pts
95 pts
95 pts
95 pts