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).
Particulars and performance data for a Delage Sporting Model car.
| Identifier | ExFiles\Box 21\4\ Scan088 | |
| Date | 12th December 1921 | |
| X3525 "DELAGE" CAR. Sporting model - particulars. Weight complete with - Open touring body (boat shape) 4-seater Rudge Whitworth 880 X 120 wire wheels 2 spare wheels carried at sides. Petrol tank, to hold 21½ gallons. Engine - 2.2 galls. of oil and 5¼ galls. water. Front 18 cwts. Rear 18 cwts. 2 qrs. - total 4,088 lbs. Gear ratios - top direct 3.25 to 1 ) 3rd. 5.125 to 1 ) taken through axle. 2nd. 8.00 to 1 ) 1st. 11.875 to 1 ) Reverse 15.4 to 1 ) 1000 engine revs. = 31.1 M.P.H. Petrol consumption on road 20 M.P.H. 14.5 M.P.G. 30 M.P.H. 14.25M.P.G. Average 15.5 M.P.G. Acceleration - M.P.H. at start. Distance yds. Secs. M.P.H. finish. 10 528.3 34 49.7 20 " " " 30 " " " 40 " " " Dynamometer Test 12.12.21. Engine revs. Dyn. revs. Petrol pts. per hr. lbs. lift. HP. Vacuum in Induction pipe. 500 109 16 107 16.67 .125" mercury. 750 163 22.5 99 23 .2187" " 1000 217 26.5 101 31.3 .4062" " 1250 272 33 102 39.6 .6875" " 1500 326 38 98 45.6 1" " 1750 360 42 91 49.4 1.375" " 2000 434 45.75 82 50.8 1.75" " 2250 489 51 76 53.1 2500 543 not taken owing to period of crankshaft. | ||