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).
Test and performance particulars for a Marmon Car.
| Identifier | ExFiles\Box 32\5\ Scan125 | |
| Date | 16th December 1920 | |
| HS{Lord Ernest Hives - Chair} X1692 PARTICULARS OF MARMON 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 15 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 Cons: on road - 20 M.P.H. 18 18.25 M.P.G. 30 M.P.H. 16.75 16.75 Acceleration. M.P.H. at Start. Distance Yds. Secs. M.P.H. finish. 10 528.3 32 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 smooth - no jingling. Brakes. No jaggers - Foot brake good but spongy. Side brake very poor. Contd. | ||