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 Marrion Car, including weight, gear ratios, fuel consumption, and test results.
| Identifier | Morton\M4.1\ img007 | |
| Date | 16th December 1920 | |
| PARTICULARS OF MARRION CAR. 16.12.20. Weight - complete with - Open-touring body (4-seater) 32 x 4½ mayes wire wheels with Goodyear rims. Spare wheel carried at rear - Petrol Tank to hold 18 galls. Engine - 3 galls.of oil and 4 galls of water - Front 17 cwts. } Total 3920 lbs. Rear 18 cwts. } 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. 10 528.3 32 30 20 528.3 30 55 30 528.3 25 62 40 528.3 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 23.82 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 128 64.06 2250 1575 53½ 121 68.13 2500 1750 seized. Clutch. - ease of changing - 1st. to 2nd. gear - clings a bit. Others all O.K. - no double clutch required. No squeaks - picks up smoothly. Contd. | ||