| | No | Class | T | Team | Driver | Car |
| 1 | 1 | LMP1 | M | Audi Sport North America | Dindo Capello
Allan McNish
Emanuele Pirro | Audi R10 TDI |
| 2 | 2 | LMP1 | M | Audi Sport North America | Lucas Luhr
Marco Werner | Audi R10 TDI |
| 3 | 12 | LMP1 | D | Autocon Motorsports | Chris McMurry
Tony Burgess
Bryan Willman | Lola B06 10 AER |
| 4 | 30 | LMP1 | K | Intersport Racing | Ryan Lewis
Luke Hines
George Forgeois | Lola B07/17 Judd |
| 5 | 37 | LMP1 | D | Intersport Racing | Jon Field
Clint Field
Richard Berry | Lola B06/10 AER |
| 6 | 48 | LMP1 | D | Corsa Motorsports | Johnny Mowlem
Gunnar Jeannette
Stefan Johansson | Zytek 07S Zytek |
| 7 | 50 | LMP1 | M | Team LNT | Danny Watts
Olivier Pla | Ginetta-Zytek 07S Zytek |
| 8 | 88 | LMP1 | D | Creation Autosportif | Jamie Campbell-Walter
Stephen Simpson
Harold Primat | Creation CA07 Aim |
| 9 | 07 | LMP1 | M | Peugeot Sport Total | Nicolas Minassian
Stéphane Sarrazin
Christian Klien | Peugeot 908 HDi FAP |
| 10 | 888 | LMP1 | D | Creation Autosportif | Stuart Hall
Liz Halliday
Dean Stirling | Creation CA07 Aim |
| 11 | 5 | LMP2 | M | Penske Motorsports, Inc. | Helio Castroneves
Ryan Briscoe | Porsche RS Spyder |
| 12 | 6 | LMP2 | M | Penske Racing | Sascha Maassen
Patrick Long
Emmanuel Collard | Porsche RS Spyder |
| 13 | 7 | LMP2 | M | Penske Racing | Timo Bernhard
Romain Dumas | Porsche RS Spyder |
| 14 | 8 | LMP2 | D | BK Motorsports | Ben Devlin
Gerardo Bonilla | Lola B07/46 Mazda |
| 15 | 9 | LMP2 | M | Patron Highcroft Racing | David Brabham
Scott Sharp
Dario Franchitti | Acura ARX-01B |
| 16 | 15 | LMP2 | M | Lowe's Fernandez Racing | Adrian Fernandez
Luis Diaz
Michel Jourdain | Acura ARX -01B |
| 17 | 16 | LMP2 | M | Dyson Racing | Chris Dyson
Guy Smith | Porsche RS Spyder |
| 18 | 20 | LMP2 | M | Dyson Racing | Butch Leitzinger
Marino Franchitti
Andy Lally | Porsche RS Spyder |
| 19 | 26 | LMP2 | M | Andretti Green Racing | Franck Montagny
Tony Kanaan
Marco Andretti | Acura ARX-01B |
| 20 | 66 | LMP2 | M | de Ferran Motorsports | Gil de Ferran
Simon Pagenaud
Scott Dixon | Acura ARX-01B |
| 21 | 3 | GT1 | M | Corvette Racing | Johnny O'Connell
Jan Magnussen
Ron Fellows | Chevrolet Corvette C6.R |
| 22 | 4 | GT1 | M | Corvette Racing | Olivier Beretta
Oliver Gavin
Max Papis | Chevrolet Corvette C6.R |
| 23 | 11 | GT2 | H | Primetime Race Group | Joel Feinberg
Chris Hall | Dodge Viper Competition Coupe |
| 24 | 18 | GT2 | K | VICI Racing | Nicky Pastorelli
Marc Basseng
Francesco Pastorelli | Porsche 911 GT3 RSR |
| 25 | 21 | GT2 | Y | Panoz Team PTG | Tommy Milner
Joey Hand
TBA | Panoz Esperante Ford |
| 26 | 28 | GT2 | D | LG Motorsports | Lou Gigliotti
Tomy Drissi
Marc Goossens | Chevrolet Riley Corvette C6 |
| 27 | 40 | GT2 | D | Robertson Racing | David Robertson
Andrea Robertson
David Murry | Doran Ford GT-R |
| 28 | 44 | GT2 | M | Flying Lizard Motorsports 44 | Darren Law
Seth Neiman
Lonnie Pechnik | Porsche 911 GT3 RSR |
| 29 | 45 | GT2 | M | Flying Lizard Motorsports | Jörg Bergmeister
Wolf Henzler
Marc Lieb | Porsche 911 GT3 RSR |
| 30 | 46 | GT2 | M | Flying Lizard Motorsports | Johannes van Overbeek
Patrick Pilet | Porsche 911 GT3 RSR |
| 31 | 54 | GT2 | F | Black Swan Racing | Tim Pappas
Anthony Lazzaro
Andy Pilgrim | Doran Ford GT-R |
| 32 | 61 | GT2 | M | Risi Competizione | Tracy Krohn
Nic Jonsson
Eric van de Poele | Ferrari 430 GT |
| 33 | 62 | GT2 | M | Risi Competizione | Jaime Melo
Mika Salo | Ferrari 430 GT |
| 34 | 71 | GT2 | M | Tafel Racing | Dominik Farnbacher
Dirk Müller | Ferrari 430 GT |
| 35 | 73 | GT2 | M | Tafel Racing | Alex Figge
Jim Tafel
Pierre Ehret | Ferrari 430 GT |
| 36 | 87 | GT2 | M | Farnbacher Loles Racing | Dirk Werner
Bryce Miller
Jörg Hardt | Porsche 911 GT3 RSR |
| 37 | 99 | GT2 | M | JMB Racing | Ben Aucott
Pierre Kaffer
Stéphane Daoudi | Ferrari 430 GT |
| 38 | 007 | GT2 | D | Drayson-Barwell | Paul Drayson
Jonny Cocker
Darren Turner | Aston Martin Vantage |
