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 and specification data for a Marion Car.
| Identifier | ExFiles\Box 180\M4\M4.1\ img007 | |
| Date | 16th December 1920 | |
| PARTICULARS OF MARION CAR. Weight - complete with - Open-touring body (4-seater) 32 x 4½ Hayes wire wheels with Goodyear rims. spare wheel carried at rear - Petrol tank to hold 14 galls. Engine - 3 galls. of oil and 4 galls of water - Front 17 cwts. } Rear 16 cwts. } Total 3920 lbs. Gear Ratios. - Top direct 4.15 to 1 2nd. 6.861 to 1 1st. 14 to 1 Reverse 18 to 1 1000 Engine Revs: = 23.5 M.P.H. on the road. Petrol Consumption on road. 20 M.P.H. 18 18.25 M.P.G. 30 M.P.H. 16.75 16.75 M.P.G. Acceleration. M.P.H. at start. Distance yds. Secs. M.P.H. Finish. 10 525.3 32 - 20 525.3 30 55 30 525.3 25 62 40 525.3 22 63 Dynamometer Test. - Eng. Revs. Dyn. Revs. Petrol Pts. per hr. lbs. lifted. HP. 500 350 13 118 14.76 750 525 19 128 25.82 1000 700 31 148 37.03 1250 875 39½ 150 46.72 1500 1050 44 144 54.12 1750 1225 46½ 137 59.99 2000 1400 50½ 126 64.06 2250 1575 53½ 121 68.13 2500 1750 seized. Clutch - ease of changing - 1st. to 2 nd. gear - clings a bit. Others all O.K. - no double clutch required. no squeaks - picks up smoothly. Contd. | ||