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 of four vehicles at Brooklands race track.
| Identifier | ExFiles\Box 91\2\ scan0412 | |
| Date | 25th June 1937 | |
| 300a, also 300b, 1062, 1320. At Brooklands. 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. Lap. Speeds min.secs 79.05 mph 2 6, 79.68" 2 5 min.secs 71.15 mph 2 20, 70.14" 2 22 MPH Direct =85.84 Overdrive =89.06 MPH Direct = 88.94 Overdrive = 90.06 Half Mile 83.33" 21.6secs 75." 24 secs. 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" Deceleration MPH. SECS. 70-60 - 9.3, 70-50 - 21.25, 70-40 - 38.10, 70-30 - 61.60, 70-20 - 88.70, 70-10 - 123.30 MPH. SECS. 70-60 - 10. 70-50 - 19.8, 70-40 - 37.7, 70-30 - 58.5, 70-20 - 83.1, 70-10 - 114.4 MPH. Secs. 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 MPH. SECS. 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 21lb 47 cwts. 0 qrs 0 lbs. | ||