Comparison table of ground clearance measurements for various car models.
| Identifier | ExFiles\Box 4\1\ 01-page141 | |
| Date | 29th October 1934 | |
| J6894 To HM {Capt. W. Hallam - Head Repairs} /Rm. {William Robotham - Chief Engineer} c. to E. {Mr Elliott - Chief Engineer} HM {Capt. W. Hallam - Head Repairs} /PA {Mr Paterson} /AK.29.10.34. Ground Clearance on | 19-G-IV 25 HP. 4 Pass. | 28-KX 40/50 5 Pass. | 3-B-IV Bentley 4 Pass. | 1-S-I Spectre(Codename for Phantom III) 5 Pass. | Essex 6 4 Pass. | Cadillac 5 Pass. S L --- | --- | --- | --- | --- | --- | --- Under front axle, lowest point | 10" | H.W. Jacks 8.1" | 6.625" | 7.5" | 8.75" | 7.2" Under Crankcase | 7.5" | 8.3" | 6.0" | 7.3" | 9.5" | 9.5" Under side steering tube | 9.4" | 8.1" | 7.9" | stg. arm 7.3" | 9.0" | 9.1" Under battery box | 7.1" | 8.4" | 6.9" | 7.0" | 9.1" | 9.3" Under rear cross member prop. shaft. lowest point. | 7.4" | 7.25" | 6.25" | 6.5" | - | - Under front silencer | 8.1" | 8.2" | 8.4" | 6.6" | 8.25" | - Under rear silencer | F.P.7.0" R.P.7.3" | F.P.7.8" R.P.10.8" | 6.5" | F.P.6.5" R.P.6.85" | F.P.8.75" R.P.8.75" | F.P.10.15" R.P.10.3" Buffer clearance - rear | HA.3.075" CA.3.25" | HA.4.4" CA.4.7" | HA.2.25" CA.2.125" | HA.3.1" CA.3.3" | HA.3.9" CA.3.5" | HA.3.8" CA.3.7" HM {Capt. W. Hallam - Head Repairs} /7.Dodd. | ||
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).