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).
Summary of road test performance results for Alvis, Bentley, Buick, Chevrolet, Hotchkiss, and Lagonda vehicles.
| Identifier | ExFiles\Box 128\1\ scan0211 | |
| Date | 10th March 1936 | |
| ROAD TEST PERFORMANCES - SUMMARY OF RESULTS OF ROAD TESTS BY TECHNICAL STAFF OF "THE MOTOR". ALVIS | BENTLEY | BUICK | CHEVROLET | HOTCHKISS | LAGONDA Maximum Speeds: Top: 93 MPH. | 90 MPH. | 83.3 MPH. | 80 MPH. | 92 MPH. | 97.7 MPH. 3rd: 70 MPH. | 75 MPH. | | | 76 MPH. | 80 MPH. 2nd: | | 55 MPH. | 50 MPH. | | Acceleration: Top 10-30 MPH: 9 secs. | 7.5 secs. | 7.5 secs. | 7 secs. | 8 secs. | 8 secs. 30-50 MPH: 10 " | 8.5 " | 9.5 " | 11 " | 10 " | 9.5 " 3rd 10-30 MPH: 6 secs. | 6 secs. | | | 6.5 " | 6 secs. 30-50 MPH: 7 " | 8 " | | | 7.5 " | 8 " 2nd 10-30 MPH: | | 5 secs. | 5 secs. | | 30-50 MPH: | | 8 " | 8 " | | Standstill to 50 MPH: 12 secs. | 12.8 secs. | 13 secs. | 15 secs. | 11.2 secs. | 11.2 secs. to 60 MPH: 17 " | 18 " | 21 " | 22 " | 16.4 " | 15.5 " Standing 1/4 mile: 20 secs. | 20.8 secs. | 21.4 secs. | 23 secs. | 20 secs. | 19.6 secs. (45 M.P.H.) | (43.2 MPH.) | (42 MPH.) | (39 MPH.) | | (45.9 MPH.) Gradients Climbable. Top: 1 in 9 | 1 in 8 | 1 in 7.75 | 1 in 9 | 1 in 9.7 | 1 in 8.6 3rd: 1 in 6.2 | 1 in 6.6 | | | 1 in 6.4 | 1 in 6.6 2nd: | | 1 in 5 | 1 in 5.5 | | Petrol Consumption: 17 m.p.g. | 17.19 mpg. | 17.2 m.p.g. | 18 m.p.g. | 14-17.5 m.p.g. | 16 m.p.g. Braking Efficiencies. From 30 M.P.H.: 90% | 82% | 86% | 90% | 100% | 96% From 50 M.P.H.: 82% | 76% | 78% | 83% | 95% | 84% | ||