Comparative data table of various cars, detailing specifications like weight, capacity, gear ratios, and climbable gradients.
| Identifier | ExFiles\Box 104\4\ scan0270 | |
| Date | 30th March 1936 guessed | |
| TABLE DATA Row 1: Car: Buick 40 Capacity c.c.: 3800 Weight (cwts) Unladen: 31 Weight (cwts) Assumed Laden: 37½ Laden wt/capacity Ratio cc/cwt: 101 Rolling Rad. Tyres in.: 13.6 Overall gear ratio: 1st 13.05, 2nd 7.36, 3rd -, Top 4.44 Gradient Climbable 1 in.: 1st 2.7, 2nd 4.8, 3rd -, Top 8.5 Row 2: Car: Packard 120. Capacity c.c.: 4620 Weight (cwts) Unladen: 33½ Weight (cwts) Assumed Laden: 40 Laden wt/capacity Ratio cc/cwt: 115 Rolling Rad. Tyres in.: 14.1 Overall gear ratio: 1st 9.3, 2nd 6.25, 3rd -, Top 4.09 Gradient Climbable 1 in.: 1st 3.4, 2nd 5.2, 3rd -, Top 8.4 Row 3: Car: Cadillac 16. Capacity c.c.: 7415 Weight (cwts) Unladen: 58 Weight (cwts) Assumed Laden: 64½ Laden wt/capacity Ratio cc/cwt: 115 Rolling Rad. Tyres in.: 14.8 Overall gear ratio: 1st 11.15, 2nd 6.84, 3rd -, Top 4.64 Gradient Climbable 1 in.: 1st 3.0, 2nd 5.1, 3rd -, Top 7.7 Row 4: Car: Phantom III Capacity c.c.: 7338 Weight (cwts) Unladen: 49 Weight (cwts) Assumed Laden: 55½ Laden wt/capacity Ratio cc/cwt: 132 Rolling Rad. Tyres in.: 15.1 Overall gear ratio: 1st 12.0, 2nd 8.45, 3rd 5.67, Top 4.25 Gradient Climbable 1 in.: 1st 2.4, 2nd 3.6, 3rd 5.4, Top 7.3 Row 5: Car: Bentley I Capacity c.c.: 3669 Weight (cwts) Unladen: 34 Weight (cwts) Assumed Laden: 40½ Laden wt/capacity Ratio cc/cwt: 91 Rolling Rad. Tyres in.: 14.15 Overall gear ratio: 1st 11.3, 2nd 7.1, 3rd 5.13, Top 4.1 Gradient Climbable 1 in.: 1st 3.3, 2nd 5.4, 3rd 7.7, Top 10.0 Row 6: Car: Bentley II Capacity c.c.: 4256 Weight (cwts) Unladen: 34 Weight (cwts) Assumed Laden: 40½ Laden wt/capacity Ratio cc/cwt: 105 Rolling Rad. Tyres in.: 14.15 Overall gear ratio: 1st 11.3, 2nd 7.1, 3rd 5.13, Top 4.1 Gradient Climbable 1 in.: 1st 2.8, 2nd 4.6, 3rd 6.7, Top 8.6 Row 7: Car: 20/25. Capacity c.c.: 3669 Weight (cwts) Unladen: 39 Weight (cwts) Assumed Laden: 45½ Laden wt/capacity Ratio cc/cwt: 81 Rolling Rad. Tyres in.: 15.0 Overall gear ratio: 1st 15.1, 2nd 9.56, 3rd 6.25, Top 4.55 Gradient Climbable 1 in.: 1st 3.2, 2nd 5.2, 3rd 8.3, Top 12.0 Row 8: Car: 25/30. Capacity c.c.: 4256 Weight (cwts) Unladen: 39 Weight (cwts) Assumed Laden: 45½ Laden wt/capacity Ratio cc/cwt: 93 Rolling Rad. Tyres in.: 15.0 Overall gear ratio: 1st 15.1, 2nd 9.56, 3rd 6.25, Top 4.55 Gradient Climbable 1 in.: 1st 2.7, 2nd 4.4, 3rd 7.0, Top 10.0 Row 9: Car: 25/30 3 speed. Capacity c.c.: 4256 Weight (cwts) Unladen: 39 Weight (cwts) Assumed Laden: 45½ Laden wt/capacity Ratio cc/cwt: 93 Rolling Rad. Tyres in.: 15.0 Overall gear ratio: 1st 12.8, 2nd 7.14/6.8, 3rd -, Top 4.55 Gradient Climbable 1 in.: 1st 3.2, 2nd 6.0/6.4, 3rd -, Top 10.0 ADDITIONAL NOTES: Assumed Weight = Unladen wt plus 4 passengers (at 11 st.each) plus 1 cwt luggage = U.W. plus 6.5 cwts. In each case the following data has been used. B.M.E.P. 105 at 1000 r.p.m. Except Bentley for which 115 is allowed. Overall Transmission Efficiency 90% Tractive Resistance 40 lbs/Ton wt. .069 2nd speed, X .037 2nd speed. | ||
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).