From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
General chassis data comparison for the Phantom III, Bentley, and Wraith III models.
Identifier | ExFiles\Box 107\2\ scan0012 | |
Date | 9th June 1938 | |
ISSUE No. 1 GENERAL CHASSIS DATA 9TH JUNE, 1938. ||PH. III.|BENTLEY|WRAITH III.| |---|---|---|---| |BORE (INS)|3.250 DIA:|3.50 DIA|3.50 DIA| |STROKE (INS)|4.500|4.500|4.500| |SWEPT VOLUME|37.300 C. INS.|43.295 C.INS.|43.295 C.INS.| |COMPN. RATIO|6 TO 1|6.4 TO 1|6 TO 1| |CAPACITY (C.INS) (C.C.S)|447.6, 7340|259.8, 4257|259.8, 4257| |R.A.C. RATING|50.7 H.P.|29.4|29.4| |CRANKPIN DIA:|2.250|2.00|2.00| |JOURNAL DIA:|2.750|2.250|2.500| |GUDGEON PIN DIA:| .875|.750|.750| |CON. ROD CRS|9.250|7.950|7.950| |CAM. LIFT|.305|.335|.2795| |VALVE LIFT|.407|.407|.3627| |MAX. ENGINE R.P.M.|4500|4500|4500| |STARTER MOTOR RATIO|18.5 TO 1|16 TO 1|16 TO 1| |MAX. M.E.P. LBS/Sq.Ins|110|120|110| |AXLE RATIO|8/34 (4.25)|10/43 (4.3)|8/34 (4.25)| GEAR RATIOS |||OVERDRIVE|STANDARD| |---:|:---:|:---:|:---:| |OVERALL RATIOS|||| |4TH|3.53|3.64|4.25| |3RD|4.25|4.30|5.70| |2ND|6.15|6.43|8.46| |1ST|11.50|10.25|13.00| |REVERSE|12.01|10.10|13.00| |GEARBOX RATIOS|||| |---:|:---:|:---:|:---:| |4TH|1.2048|1.18|DIRECT| |3RD|DIRECT|DIRECT|.7452| |2ND|.6900|.6693|.5027| |1ST|.3696|.4199|.3226| |REVERSE|.3528|.4255|.3226| |ENGINE WEIGHT|856 LBS.|584 LBS.|550 LBS.| |---:|:---:|:---:|:---:| |GEARBOX WEIGHT|133 LBS.|129 LBS.|110 LBS.| |CHASSIS WEIGHT|33 1/2 CWTS.|21 1/4 CWTS.|28 3/4 CWTS.| |CHASSIS OVERALL LENGTH|17 FT. 10 1/4"|15 FT. 6 3/4"|16 FT. 11 INS.| |CHASSIS OVERALL WIDTH|6 FT. 3"|5 FT. 8 1/2 INS.|6 FT. 1 INS.| |TRACK (FRONT) (REAR)|61.100, 59.950|56.000, 56.950|58.5", 58.5"| |WHEEL BASE|11' 10"|10' 6"|11' 4"| |GROUND CLEARANCE|8 INS|6 INS|6 INS| |TURNING CIRCLES (R.H.) (L.H.)|47' -2", 47' -2"|40' 11", 39' 7"|42' 7", 42' 7"| |FRONT BRAKES EFFECTIVE DIAMETER|16 INS.|12 INS.|13 INS.| |REAR BRAKE EFFECTIVE DIAMETER|16 INS.|12 INS.|13 INS.| |TYRES SIZE|7.000x 18 INS.|6.5 x 17 INS.|6.5 x 17 INS| |ENGINE OIL SUMP CAPACITY|2 1/4 GALLS|1 1/2 GALLS|1 1/2 GALLS| |COOLING SYSTEM CAPACITY|5 1/2 GALLS|3 GALLS|2 1/2 GALLS| |TANK CAPACITY|33 GALLS|18 GALLS|18 GALLS| |RETAIL PRICE|£1900.|£1150.|£1100.| Stamp: ROLLS-ROYCE LTD. PRINT ROOM 24 AUG 1938 DERBY | ||