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 specifications for various 1925 car models.
| Identifier | ExFiles\Box 160\2\ scan0086 | |
| Date | 8th January 1926 | |
| Oy3-E-1826 January 8, 1926. Comparsion of Cars - 1925 Models Car Eng. Capy. Comp. Ratio Axle Ratio Wheel Size Touring Car Wt. Displacement per ft. Displacement per Ton foot Corrected for 4 to 1 ratio Ajax 170 -- 4.7 30 2350 50.7 43.1 Buick (small) 191 -- 4.9 31 3100 57.5 37.2 Buick (large) 255 -- 4.7 32 3650 71.5 39.2 Cadillac 314.4 4.8 4.64 33 4350 84.5 38.9 43.0 Cadillac 314.4 4.8 5.00 33 4350 91.0 42.0 46.2 Chrysler 218.5 -- 4.6 30 2880 64.0 44.3 Cunningham 441.7 4.3 4.23 33 4750 108.5 45.6 47.7 Diana 240 -- 4.8 32 3200 68.5 43.0 Dodge 212 -- 4.16 30 2700 56.0 41.5 Duesenberg 259.7 5.0 5.3 33 3850 80.0 41.6 47.0 Essex 145 -- 5.6 30 2335 51.5 44.2 Flint 55 268 -- 4.77 32 3450 76.0 44.0 Ford 176.7 3.9 3.63 30 1635 40.5 49.5 48.8 Franklin 199.1 4.4 4.73 31 2850 57.0 40.0 42.2 Hudson 289 -- 4.45 33 3625 74.5 41.0 Hup 8 247 -- 4.64 33 3335 66.5 40.0 Jewett 249 -- 4.45 31 3035 68.0 45.0 Jordan 8 268.6 -- 4.64 32 3500 73.5 42.0 Lincoln 357.8 4.8 4.68 33 4500 97 43.1 47.5 Locomobile 48 524.8 -- 3.50 33 5180 106.5 41.2 Marmon 339.7 4.3 4.10 32 3725 82.5 44.2 46.2 | ||