Rolls-Royce Archives
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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 from tests at Brooklands comparing two cars with various wheel and tyre setups.

Identifier  ExFiles\Box 107\1\  scan0457
Date  6th August 1937
  
560.

AT BROOKLANDS 6.8.37.

| | Standard Wheels & Tyres 5.50 x 18. | Standard front 6 x 19 Dunlop Racing Rear. | Standard front 6 x 19 rear (cut-out open). | Standard front 6.50 x 17 rear |
|---|---|---|---|---|
| Lappins Bentley Std. 4½ litre. | Lap. 114.2 secs. 87.07 m.p.h. Half mile 20.6 se 87.38 m.p.h. | Lap. 112 secs. 88.94 m.p.h. Half Mile 20.2 secs. 89.11 m.p.h. | | |
| B-56-BN{W.O. Bentley / Mr Barrington} O.H.C. Engine. | 112 secs. Lap. 88.94 m.p.h. Half mile 20.2 secs. 89.11 m.p.h. | 110.6 secs. Lap. 90.22 m.p.h. Half mile. 19.8 secs. 90.91 m.p.h. | 107.2 secs. Lap. 92.92 m.p.h. Half mile 19 secs. 94.74 m.p.h. | 110.6 secs. Lap. 90.22 m.p.h Half mile 19.8 secs. 90.91 m.p.h. |

Rm{William Robotham - Chief Engineer}/F.Dodd.
  
  


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