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).
Report comparing the performance of a Rolls-Royce and a Cadillac in various road trials.
| Identifier | ExFiles\Box 125\1\ scan0004 | |
| Date | 29th August 1919 guessed | |
| X.1729 X.1729. R-R AND CADILLAC TRIALS. X.3056. X.3743. SALON-AIX ROAD; 22nd. Jan. Weather. Mistral caught the car sideways. MEASUREMENTS OF SURFACE PRESENTED TO WIND PRESSURE. See drawing No.1. Both cars are very similar. PETROL CONSUMPTION. In 131 miles RR spent 62 litres against 45 on CA. ONE KILOMETER DEAD START ON TOP GEAR ONLY AND GOING SLIGHTLY DOWNWARDS. R-R did it in 55"4/5 CA " " 52"1/5 ONE KILOMETER DEAD START ON TOP GEAR ONLY SLIGHTLY UPWARDS. R-R did it in 1' 11"1/5 CA " " 1' 1/5 SAME TRIAL WITH RR ON THIRD. R-R did it in 57"1/5 FLYING KILOMETER SLIGHTLY DOWNWARDS R-R did it in 38"1/5 CA " " "37"4/5 FLYING KILOMETER SLIGHTLY UPWARDS. R-R did it in 41" 1/5 CA " " 40" 2/5 RR ON FIRST AGAINST CA ON FIRST. RR won by very little but CA had more acceleration. RR ON SECOND AGAINST CA ON SECOND. RR won by very little but CA has more acceleration. RR ON THIRD CA ON TOP. If anything is faster it is the CA specially on the level. ACCELERATION ON TOP GEAR WITH CARS STOPPED. CA won easily. ACCELERATION TEST WITH CARS STOPPED AND STARTING FROM FIRST GEAR TO TOP. Out of three tests CA won twice and the third time both were equal. Contd. | ||