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).
Comparison table of technical specifications for various 1925 model cars.
| Identifier | ExFiles\Box 160\2\ scan0087 | |
| Date | 8th January 1926 | |
| Oy3-E-1826 Comparison of Cars - 1925 Models -2- January 8, 1926. Car Eng. Capy. Comp. Ratio Axle Ratio Wheel Size Touring Car Wt. Dis-place-ment per ft. Dis-place-ment per Ton foot Corrected for 4 to 1 ratio Macfarlane 572.5 4.3 3.53 33 4750 117 49.2 51.4 Nash (Small) 207 --- 4.88 31 3110 62 40.2 Nash (large) 249 --- 4.5 33 3600 65 36.2 Oakland 185 --- 4.73 31 2650 54 40.8 Packard 6 288.6 4.5 4.66 33 3850 78 40.5 43.4 Packard 8 357.8 4.5 4.70 33 4270 97.5 45.7 48.9 Peerless 70 288.6 --- 4.63 33 3400 77.5 45.5 Peirce-Arrow 33 414.7 --- 4.29 33 5100 103 40.2 Peirce-Arrow 80 288.6 --- 4.45 32 3585 76 42.5 Rickenbacker 8 268.6 4.7 5.10 32 3500 81 46.2 50.6 Rolls-Royce Silver Ghost 453 3.92 3.72 33 5000 97.5 39.0 38.6 Rolls-Royce Phantom 468 4.00 3.72 33 5300 101 38.15 38.15 StevensDuryea 510.4 --- 3.76 33 5500 111 40.2 Wills StClaire 273.7 4.0 4.90 33 3700 78 42.1 42.1 Willys Knight 236.4 --- 5.11 32 3600 71.5 39.7 | ||