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 sheet detailing lap speeds, acceleration times, and engine temperatures under various test conditions.
| Identifier | ExFiles\Box 82\3\ scan0260 | |
| Date | 11th May 1935 guessed | |
| ( 2 ) Cut-out Open. Average Lap speed....... 88.2 MPH. Engine revs............. Max.4,650 Min.4,400 Oil Temperature........... 98°c Water Temperature......... 78°c ACCELERATIONS. MPH. MPH. Secs. MPH. MPH. Secs. 10 - 20 4.2/5 10 - 40 11.2/5 20 - 30 4. 30 - 40 3.4/5 40 - 60 10.3/5 40 - 50 4. 50 - 60 6. 60 - 80 18 against wind 60 - 70 6.4/5 12 with wind. 70 - 80 6.4/5 10 to 80 34.2/5 Standing start through gears to 80 MPH. 29 secs.& 32.2/5 secs. CONDITIONS. Axle ratio.....10 x 43 Rear Wheels......19 inch. 6 x 19 tyres. 5.B.IV. Cut-out Closed. Maximum revs..............4,350 Oil Temp..................102°c Water Temp................ 78°c Average Lap Speed...........142.448 KPH. = 88.5 MPH. 5.B.IV. Cut-out Opened. Maximum revs..............4,450 Oil Temp..................120°c Water Temp................ 78°c Average Lap Speed...........144.695 KPH. = 89.9 MPH. PARIS TRIALS CAR B. I. CW. Cut-out Closed. Average Lap Speed...140.7 KPH = 87.4 MPH. Cut-out Open. Average Lap Speed...142.448 KPH = 88.5 MPH. ................ | ||