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).
Road test report comparing engine temperatures of different car configurations after a full throttle hill climb.
| Identifier | ExFiles\Box 93\4\ scan0038 | |
| Date | 27th June 1936 guessed | |
| Road Test (1). Cars run at same average speed over given course and temperatures noted at end of full throttle climb of Ticknall Hill. Car tested, and conditions of test etc. | Temperatures at end of climb. | Temp.at 'B' side outlet °C. | Temp. at 'A' side outlet °C. | Cyl.Block Temp. 'B' side - °C. (1) 33-EX - Shuttered Bonnet | - | 74.0 | 71.5 (2) No.32 Production Chassis Shuttered Bonnet. | 73.0 | 72.0 | 75.5 (3) No.38 Production Chassis Shuttered Bonnet. | - | 73.0 | 74.0 (4) No.30 Production Chassis Shuttered Bonnet. | - | 75.0 | 85.0 (5) No.30 Production Chassis Louvred Bonnet. | - | 71.0 | 81.0 (6) No.30 Production Chassis Louvred Bonnet, with cyl. heads off No.38 fitted. | 70.0 | 70.5 | 76.5 (7) No.30 Production Chassis, shuttered bonnet. Front two outlets to top water rail blanked off. | 75.0 | 73.0 | 79.0 (8) No.30 Production Chassis, shuttered bonnet. Restricted main water outlets. | 76.5 | 76.0 | 84.0 | ||