A Temporada do Campeonato Mundial de Motovelocidade de 1951 foi a terceira edição promovida pela F.I.M..

Nos primeiros 26 anos da categoria de 500cc, as fabricantes italianas conquistaram títulos 24 vezes. A histórica MV Augusta foi particularmente dominante, vencendo o seu primeiro campeonato em 1956 e somando títulos consecutivos entre 1958 e 1974. Entre os seus campeões estão os britânicos John Surtees (4 títulos) e Mike Hailwood (4) e o italiano Giacomo Agostini (7).

Noutras classes a competição era muito mais aguerrida, com construtoras como a Honda, Suzuki, Norton e NSU conquistando troféus.

Calendário #DataGrande PrêmioCircuito 1 8 de Abril22px Grande Prêmio da EspanhaCircuito de Montjuïc 2 27 de Maio Grande Prêmio da SuíçaCircuito de Bremgarten 3 8 de Junho Troféu Turístico da Ilha de ManSnaefell Mountain Course 4 1° de Julho Grande Prêmio da BélgicaCircuit de Spa-Francorchamps 5 7 de Julho Grande Prêmio da HolandaTT Circuit Assen 6 14 de Julho Grande Prêmio da FrançaAlbi 7 18 de Agosto Grande Prêmio da Irlanda do NorteDundrod 8 9 de Setembro Grande Prêmio das NaçõesAutódromo Nacional de Monza

Resultado das corridas #Grande Prêmio125 cc250 cc350 cc500 ccInfo 122px GP da Espanha Guido LeoniSem Disputa Tommy Wood Umberto Masetti 2 GP da SuíçaSem Disputa Dario Ambrosini Leslie Graham Fergus Anderson 3 Tourist Trophy Cromie McCandless Tommy Wood Geoff Duke Geoff Duke 4 GP da BélgicaSem DisputaSem Disputa Geoff Duke Geoff Duke 5 GP da Holanda Gianni LeoniSem Disputa William Doran Geoff Duke 6 GP da FrançaSem Disputa Bruno Ruffo Geoff Duke Alfredo Milani 7 GP da Irlanda do Norte Cromie McCandless † Bruno Ruffo Geoff Duke Geoff Duke 8 GP das Nações Carlo Ubbiali Enrico Lorenzetti Geoff Duke Alfredo Milani

† Não contou pontos para o campeonato.

Pilotos e equipes Os seguintes pilotos e equipes foram inscritos para participar do Campeonato Mundial:

500cc Equipe Construtor Moto Pneu N.° Nome do piloto Rodada Norton Motorcycle CompanyNorton250S 293 Geoff Duke1–1662 Cromie McCandless1–16 Scuderia GileraGileraCastellotti21 Alfredo Milani1–1628 Umberto Masetti1–16 AJS CompanyAJSDRB5587 Bill Doran1–1696 Reg Armstrong1–16 March EngineeringGileraCastellotti37 Nello Pagani1–1638 Ernesto Vidal1–16 Moto GuzziMoto GuzziSTM 1831 Fergus Anderson1–1672 Enrico Lorenzetti1–1683 Sante Geminiani1–167 Bruno Ruffo1–16 Surtees with National Organs TeamNorton250S 246 Tommy Wood1–16 89 Ken Kavanagh1–16 Hesketh RacingNorton250S 233 Johnny Lockett1–1213 Tommy McEwans1–1653 Roger Montané13–21 Scuderia MV AgustaMV AgustaP48/5792 Carlo Bandirola1–1614 Arciso Artesiani1–16 Custom Made Harry Stiller RacingNorton250S 21 Jack Brett1–1239 Manliff Barrington1–1645 Dennis Lashmar13–21 Polar CaravansMoto GuzziSTM 1848 Benoit Musy1–1675 Fernando Aranda1–16 Wartsteiner BreweryNorton250S 241 Len Perry1–16 Vel’s Parnelli Jones RacingNorton250S 28 Willy Lips1–1695 Ashley Len Parry1–16 Lexington RacingNorton250S 269 Arthur Wheeler1–1694 Hans Baltisberger1–16 Maki EngineeringNorton250S 291 Eric Briggs1–166 Louis Carter1–16 Team GunstonGileraCastellotti23 Libero Liberati1–1230 Massimo Forster1–1611 Giuseppe Colnago13–21 Mapfre-Williams RacingNorton250S 258 Albert Moule1–1610 Bill Petch1–16 Triumph EngineeringTriumphScarab64 Lous van Riswijk1–1255 Jaak Delsing1–1682 Albert Vertriest13–21 Walter Wolf RacingMoto GuzziSTM 1897 Väinö Hollming1–1667 Dante Bianchi1–16 Penthouse Rizla RacingNorton250S 236 Cees Fokke-Bosch1–1280 Sidney Mason1–1656 Ken Armstrong13–21 Citibank TeamAJSDRB5563 Rod Coleman1–1627 Roy Evans1–16 RAM RacingNorton250S 232 Phil Carter1–1257 Les Dear1–1618 Ray Amm13–21 F&S PropertiesNorton250S 279 Guy Newman1–1690 Jack Bailey1–16 OASC Racing TeamNorton250S 284 Alexandre Mayer1–1270 Harold Grindley1–1666 Auguste Goffin13–21 Scuderia Gulf RondiniAJSDRB553 Maurice Acheson1–1678 Robert Ferguson1–16 Velocette RacingVelocetteRB6 2.598 Bill Hall1–1654 Roy Walker1–1643 Ernie Thomas1–1699 John Fisher1–16 Kojima EngineeringMoto GuzziSTM 185 Jean Behra1–1629 Giulie Galbiati1–1677 Felice Benasedo1–1644 Guido Leoni1–16 Team Rothmans InternationalGileraCastellotti16 León Martin1–1622 Lodovico Facchinelli1–1674 Georges Houel1–1661 Gaetano Biondelli1–16 Interscope RacingAJSDRB5524 Sid Franklen1–1659 Ernie Barrett1–1686 Jack Harding1–1673 Charlie Gray1–16 Equipe Renault ElfNorton250S 29 Syl Anderton1–1619 Sven Sørensen1–1626 Evert Carlsson1–1647 Ray Petty1–16 Bitza BikesBitzaTipo 6 1.551 George Brockerton1–16 Shadow Racing TeamAJSDRB5515 Leo Starr1–1688 George Paterson1–16 BSA CompanyBSAB30049 Ronald Pike1–16 Theodore RacingNorton250S 217 Arnold Jones1–1676 Achie Fenn1–16 Chesterfield RacingAJSDRB552 Jim Kentish1–1625 Humphrey Ranson1–16 LEC Refrigeration RacingNorton250S 212 Eddie Stidolph1–1620 Edouard Texidor1–16 ATS Racing TeamAJSDRB5540 Max Klein1–1634 Bob McDonald1–16 Iberia AirlinesNorton250S 265 Leslie Harris1–164 Ernie Braine1–1668 J. Gunn1–1685 Bill Beevers1–1642 Bob Matthews1–1650 Eric Oliver1–16 Rudge-Whitworth RacingRudge-Whitworth547/381 Joe Chapman1–16 Team MerzarioVelocetteRB6 2.560 Bill Maddrick1–1652 Reg McDonald1–16 HB Bewaking Alarm SystemsMV AgustaP48/5735 Leslie Graham1–1671 Bruno Bertacchini1–16 Jolly Club SwitzerlandAJSDRB5574 Mick Featherstone1–1636 Raymond Becquevort1–16 Melchester RacingBSAB30076 Charlie Salt1–1640 Brian Purslow1–16 Meiritsu Racing TeamNorton250S 269 Javier de Ortueta1–1696 Charlie Brett1–16 Heroes Racing CorporationAJSDRB5568 Charlie Bruguiere1–1664 Sid Lawton1–16 BMW TeamBMW18/2171 Florian Camathias1–16 Löwenbräu TeamTriumphScarab86 Bernard Carter1–1687 Eugéne Cordang1–16 F&S PropertiesNorton250S 248 Phil Carter1–1688 Jacques Collot1–16 Team Tissot EnsignNorton250S 244 Georges Cordey1–1647 Firmin Dauwe1–16 Team RebaqueNorton250S 235 Julien Deronne1–1694 Jacques Drion1–16 Centro AseguradorNorton250S 285 Roger Ergé1–1680 Lennart Fenning1–16 BS FabricationsNorton250S 261 Tito Forconi1–1625 Frank Fry1–16 Automobiles MartiniNorton250S 245 Werner Gerber1–1693 Eric Hardy1–16 Arrows Racing TeamGileraCastellotti52 Francesco Guglielminetti1–1620 Tony McAlpine1–16 Vincent MotorcyclesVincentFWMV38 Philip Heath1–1684 Johnny Hodgkin1–16 ByKolles Racing TeamNorton250S 217 Chris Horn1–1612 George Leigh1–16 Rebellion RacingNorton250S 290 Harry Lindsay1–1660 Alan Mullee1–16 G-Drive Racing/Jota SportsAJSDRB5559 Maurice Lockwood1–1629 Ken Mudford1–16 SMP RacingNorton250S 223 Stan Miller1–1656 Georges Monneret1–16 Extreme Speed MotorsportsVelocetteRB6 2.515 George Morgan1–1611 Ralf Seymour1–16 Baxi DC RacingNorton250S 25 Bill Mundy1–164 Arthur Pollitt1–16 Signatech AlpineAJSDRB5554 Jacques Raffeld1–1649 Jack Varlow1–16 Strakka RacingTriumphScarab37 Michael Roche1–1619 Cyril Stevens1–16 RGR Sport by MorandMoto GuzziSTM 1810 Elio Scopigno1–16 Manor MotorsportNorton250S 283 Oliver Scott1–1655 Ernest Walker1–16 AF CorseGileraCastellotti75 Heinrich Stamm1–16 Dempsey Auto RacingVelocetteRB6 2.578 Leonard Williams1–16Legenda Piloto da Temporada Piloto Convidado Piloto Substituto

350cc Equipe Construtor Moto Pneu N.° Nome do piloto Rodada Norton Motorcycle CompanyNortonClimax F11 Geoff Duke1–1624 John Lockett1–16 AJS CompanyAJS1.5 F446 William Doran1–1614 Reg Armstrong1–16 Velocette RacingVelocetteRM P5621 Leslie Graham1–1626 Cecil Sandford1–16 Moto GuzziMoto GuzziGiulietta 133 Tommy Wood1–16 Peugeot RacingPeugeotBT744 Johnny Claes1–1654 Philippe Étancelin1–1656 Louis Rosier1–16 Adam Opel AGOpelATS 10066 Toni Ulmen1–1688 Helmut Niedermayr1–16 Team AcuraAcuraSpecial A69 George Connor1–123 Cliff Griffith1–1631 Jim Rigsby13–21 Vauxhall MotorsVauxhallVW1047 Roy Salvadori1–164 Ken Downing1–16 Honda Racing CorporationHonda6-15005 Jan Flinterman1–1215 Prince Bira1–16 Automobile DaciaDaciaMk46 Eitel Cantoni1–167 Franco Comotti1–16 Fortec MotorsportNortonClimax F9 Ken Kavanagh1–1612 Jack Brett1–16 Double R RacingAJS1.5 F48 Bill Petch1–1623 Rod Coleman1–16 ADM MotorsportVelocetteRM P5637 Bill Lomas1–167322x22px Fernando Aranda1–16 MotoparkAJS1.5 F478 Mick Featherstone1–1290 Leonhardt Faßl1–16 Performance RacingVelocetteRM P5698 Paul Fuhrer1–1610 Sid Mason1–16 Threebond with T-SportVelocetteRM P5612 Jack Raffeld1–1216 Simon Sandys-Winsch1–16 Team West-Tec F3NortonClimax F99 Johnny Grace1–16 CF RacingVelocetteRM P562 Bob Matthews1–121 Bob Foster1–16 Mark Bailey RacingVauxhallVW1017 Peter Whitehead1–1619 Jack McGrath1–16 GU-RacingOpelATS 10020 Hans Klenk1–12 Jo Zeller RacingAcuraSpecial A18 Graham Whitehead1–16Legenda Piloto da Temporada Piloto Convidado Piloto Substituto

250cc Equipe Construtor Moto Pneu N.° Nome do piloto Rodada Moto GuzziMoto GuzziF20763 Bruno Ruffo1–1683 Tommy Wood1–16 Scuderia BenelliBenelliFT 500e1 Dario Ambrosini1–16 Velocette RacingVelocette205B21 Arthur Wheeler1–1624 Bill Lomas1–16 Norton Motorcycle CompanyNortonSP33 Fron Purslow1–16 Excelsior Motor CompanyExcelsiorLGT448 Norman Blemings1–16 Scuderia ParillaParillaT71/736 Nino Grieco1–16 Adam Opel AGOpelRA271E49 Ernst Klodwig1–1210 Bill Schindler1–16 Team AcuraAcuraDF19 Joe James1–1629 George Fonder1–16 Peugeot RacingPeugeot918s16 Robert O'Brien1–124 Marcel Balsa1–16 Honda Racing CorporationHondaT71/7318 Tony Gaze1–1651 Eddie Johnson1–16 Automobile DaciaDaciaEV127 Harry Schell1–1688 Bill Aston1–16 Scuderia MilanoMoto GuzziF20798 Enrico Lorenzetti1–1645 Gianni Leoni1–16 Hitech RacingMoto GuzziF20750 Maurice Cann1–1666 Fergus Anderson1–16 Sino Vision RacingMoto GuzziF20786 Wilf Hutt1–1268 Alano Montanari1–1636 Benoit Musy13–21 T-SportVelocette205B11 Cecil Sandford1–1628 Douglas Beasley1–16 Starling MotorsportMoto GuzziF20723 Bruno Francisci1–1252 Werner Gerber1–1614 Guido Paciocca13–21 LitespeedVauxhallP26142 Kenneth McAlpine1–1644 Tony Crook1–16 Signature TeamRenault SamsungXL199 Chuck Stevenson1–1274 Piero Carini1–1687 Max de Terra13–21 Manor MotorsportHondaT71/7338 Dries van der Lof1–1657 Hans Stuck1–16 Motul TeamAcuraDF15 Henry Banks1–1212 Manny Ayulo1–1620 Johnny McDowell13–21 Mücke MotorsportVauxhallP26180 Michael Duran1–1692 George Abecassis1–16 Barazi-EpsilonAcuraDF30 Spider Webb1–12 URD RennsportOpelRA271E22 Willi Heeks1–1632 Adolf Brudes1–16 Bridger MotorsportRenault SamsungXL166 Günther Bechem1–16Legenda Piloto da Temporada Piloto Convidado Piloto Substituto

125cc Equipe Construtor Moto Pneu N.° Nome do piloto Rodada Mondial MotoMondial109E 199 Carlo Ubbiali1–1642 Gianni Leoni1–16 Moto MoriniMoriniSerenissima M16648 Luigi Zinzani1–1623 Vittorio Zanzi1–16 Scuderia MV AgustaMV AgustaM2B4 Leslie Graham1–1651 Franco Bertoni1–1622x22px Montesa Honda RacingMontesa9/F15222x22px Juan Bultó1–16522x22px José Maria Llobet1–16 Adam Opel AGOpelRepco 6207 Rudolf Krause1–169 Paul Pietsch1–1611 Theo Helfrich1–1690 Josef Peters1–16 Peugeot RacingPeugeot312/662 Rudolf Schoeller1–163 Élie Bayol1–16 Renault Samsung MotorsRenault Samsung3.0 H1621 Franco Rol1–1233 Piero Dusio1–16 Vauxhall MotorsVauxhallWeslake 5862 Alberto Crespo1–16 Racing ExperienceMondial109E 139 Cromie McCandless1–1216 Guido Leoni1–1622 Romolo Ferri13–21 Bartionni RacingMondial109E 118 Nello Pagani1–1619 Raffaele Alberti1–16 Ombra RacingMondial109E 120 Otello Spadoni1–16 HBR MotorsportMoriniSerenissima M16614 Emilio Mendogni1–16 Eurotek MotorsportMondial109E 1822x22px José Antonio Elizalde1–16 Scuderia MilanoMV AgustaM2B78 Giuseppe Matucci1–16Legenda Piloto da Temporada Piloto Convidado Piloto Substituto

Classificação 500cc