| gptkbp:instanceOf | gptkb:piston_engine 
 | 
                        
                            
                                | gptkbp:application | gptkb:aircraft 
 | 
                        
                            
                                | gptkbp:bore | 6 in 
 | 
                        
                            
                                | gptkbp:configuration | V-12 
 | 
                        
                            
                                | gptkbp:coolingSystem | liquid-cooled 
 | 
                        
                            
                                | gptkbp:countryOfOrigin | gptkb:United_Kingdom 
 | 
                        
                            
                                | gptkbp:displacement | 36.7 L 
 | 
                        
                            
                                | gptkbp:firstRun | 1939 
 | 
                        
                            
                                | gptkbp:fuelType | aviation gasoline 
 | 
                        
                            
                                | gptkbp:height | 40.1 in 
 | 
                        
                            
                                | gptkbp:length | 77.8 in 
 | 
                        
                            
                                | gptkbp:manufacturer | gptkb:Rolls-Royce_Limited 
 | 
                        
                            
                                | gptkbp:notableFeature | larger displacement than Merlin used in late-model Spitfires
 
 | 
                        
                            
                                | gptkbp:numberOfEngines | 12 
 | 
                        
                            
                                | gptkbp:powerOutput | 1,735–2,420 hp 
 | 
                        
                            
                                | gptkbp:predecessor | gptkb:Rolls-Royce_Merlin 
 | 
                        
                            
                                | gptkbp:productionStartYear | 1939–1955 
 | 
                        
                            
                                | gptkbp:stroke | 6.6 in 
 | 
                        
                            
                                | gptkbp:successor | none (last major British V-12 piston engine) 
 | 
                        
                            
                                | gptkbp:supercharger | two-stage, two-speed (in later versions) 
 | 
                        
                            
                                | gptkbp:usedInAircraft | gptkb:aircraft gptkb:Fairey_Firefly
 gptkb:Avro_Shackleton
 
 | 
                        
                            
                                | gptkbp:valvetrain | single overhead camshaft per bank 
 | 
                        
                            
                                | gptkbp:weight | 1,980 lb (dry) 
 | 
                        
                            
                                | gptkbp:width | 30.1 in 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Rolls-Royce_Limited gptkb:Fairey_Firefly
 gptkb:Supermarine_Seafire
 gptkb:Spitfire
 gptkb:Fairey_Firefly_T.7
 gptkb:Fairey_Firefly_TT.10
 gptkb:Fairey_Firefly_TT.11
 gptkb:Fairey_Firefly_TT.13
 gptkb:Fairey_Firefly_TT.14
 gptkb:Fairey_Firefly_TT.15
 gptkb:Fairey_Firefly_TT.16
 gptkb:Fairey_Firefly_TT.17
 gptkb:Fairey_Firefly_TT.20
 gptkb:Fairey_Firefly_TT.21
 gptkb:Fairey_Firefly_TT.22
 gptkb:Fairey_Firefly_TT.23
 gptkb:Fairey_Firefly_TT.25
 gptkb:Fairey_Firefly_TT.36
 gptkb:Fairey_Firefly_TT.49
 gptkb:Fairey_Firefly_TT.53
 gptkb:Fairey_Firefly_TT.55
 gptkb:Fairey_Firefly_TT.58
 gptkb:Fairey_Firefly_TT.66
 gptkb:Fairey_Firefly_TT.67
 gptkb:Fairey_Firefly_TT.7
 gptkb:Fairey_Firefly_TT.74
 gptkb:Fairey_Firefly_TT.77
 gptkb:Fairey_Firefly_TT.78
 gptkb:Fairey_Firefly_TT.8
 gptkb:Fairey_Firefly_TT.83
 gptkb:Fairey_Firefly_TT.84
 gptkb:Fairey_Firefly_TT.86
 gptkb:Supermarine_Spitfire_(historic)
 gptkb:Supermarine_Spitfire_(historical)
 
 | 
                        
                            
                                | gptkbp:bfsLayer | 6 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Rolls-Royce Griffon 
 |