List comparing axle clearance measurements of various competitor motor cars.
| Identifier | ExFiles\Box 8\4\ 04-page003 | |
| Date | 4th October 1911 guessed | |
| Sent to Mr Royce File Copy. X615 12. hp Sunbeam. Clearance under back axle 6 1/2 inches 12 " Sizaire " " " " 4 7/8 " Silent Knight Daimler " " 8 inches Rudge Whitworth 920 x 120 tires 18 Sunbeam. 6 cyl. 820 x 120 tires 5 3/4 " Deasy. 6 3/4 " 18 Panhard. Silent Knight. Front axle 5 13/16 " 6 cyl. Lanchester. approximately 6 3/4 " This car had no sheets on. Back axle was on jacks. tires 895 x 135. We put on sheets & measured that bottom of sheets were 18 1/4 inch from Ground The middle of axle was 18 5/8 from ground The back axle lowest point was 8 3/4 from ground Knowing size of wheels you can calculate clearance allowance shld be made for depression of tires. | ||
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).