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).
Performance data comparison table for four different vehicle models tested at Brooklands.
| Identifier | ExFiles\Box 126\1\ scan0100 | |
| Date | 25th June 1937 | |
| 13/062 also 300a, 300b, /1320. At Brooklands. 25.6.37. | | OLDSMOBILE 28.3HP. | VAUXHALL 28.3 HP. | 32-EX. | 39-EX. | |---|---|---|---|---| | Speedometer Check | 30 mph.-3.3% fast. 60" -1.6%" | 30 mph - 7% fast 60" - 1.5%" | O.K. | O.K. | | | min.secs | min.secs | MPH | MPH | | Lap Speeds | 79.05 mph 79.68 " 2 5 | 71.15 mph 70.14 " 2 22 | Direct =85.8 Overdrive =89.0 | Direct = 88.94 Overdrive = 90.06 | | Half Mile | 83.33 " 21.6secs | 75. " 24secs. | Direct =85.7 Overdrive =90.0 | Direct = 92.78 Overdrive = 91.81 | | Acceleration | 10 - 30 - 7.4 secs. 10 - 40 - 11.5 " 10 - 50 - 16.5 " 10 - 60 - 21.9 " 10 - 70 - 29.25 " | 10 - 30 - 9.3 " 10 - 40 -11.5 " 10 - 50 -16.5 " 10 - 60 -21.9 " 10 - 70 -29.25 " | 10 - 30 - 8.5 sec 10 - 40 - 11.3 " 10 - 50 -15.5 " 10 - 60 -20.6 " 10 - 70 -27.5 " | 10 - 30 - 6.5 secs. 10 - 40 - 9.5 " 10 - 50 - 13.6 " 10 - 60 - 16.6 " 10 - 70 - 22.4 " | | | MPH. SECS. | MPH. SECS. | MPH. Secs. | MPH. SECS. | | Deceleration | 70-60 - 9.3 70-50 - 21.25 70-40 - 38.10 70-30 - 61.60 70-20 - 88.70 70-10 - 123.30 | 70-60 - 10. 70-50 - 19.8 70-40 - 37.7 70-30 - 58.5 70-20 - 83.1 70-10 - 114.4 | 90 - 80 6.7 90 - 70 13.0 90 - 60 23.1 90 - 50 33.7 90 - 40 50.5 90 - 30 68.3 90 - 20 95.6 | 90 - 80 4.5 90 - 70 11.0 90 - 60 18.4 90 - 50 28.8 90 - 40 44.3 90 - 30 65.1 90 - 20 125.1 | | Weight | 31 cwts.1 qr.0 lbs + 2 pass. | 30 cwts.3qrs0lbs + 2 pass. | 51 cwts 0 qrs 21 lb | 47 cwts. 0 qrs 0 lbs. | | ||