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 report for a Hupmobile 16.9 HP 4 Cylinder car.
| Identifier | ExFiles\Box 22\2\ Scan001 | |
| Date | 1st February 1922 | |
| (Filed 2-2-20) File X.4212 E.F.C. H U P M O B I L E C A R.{Sir Henry Royce} 16.9 HP. 4 CYLINDERS. Weight - complete with 4-seater open-touring body, Hood, Windscreen, 1 spare wheel at back. Full of petrol and oil and water. Hayes detachable wire wheels with Stanwell detachable rims 32 x 4 - Capacity of water system 4 galls. 1 pt. " petrol tank 12 " " oil in engine 1 " 1 qrt. Tons cwts. qrs. Front 11 2 Rear 12 2 _______________________ Total 1 4 0 = 2688 lbs. Gear Ratios. Top direct - 4.915 to 1 2nd. 9.320 to 1 3rd. 14.6 to 1 Reverse 18.45 to 1 1000 Engine Revs. 19.25 M.P.H. Petrol consumption on road | M.P.H. | M.P.G. | |---20---|---23---| |---30---|---21---| average M.P.G. 19 Acceleration. | M.P.H. at start. | Distance yds. | secs. | M.P.H. finish. | |--------10--------|-----528.3-----|---35--|--------38------| |--------20--------|-------"-------|---31--|--------40------| |--------30--------|-------"-------|---28--|--------40------| |--------40--------|-------"-------|---28--|--------43------| Dynamometer Test - not taken. Clutch. Inclined to jagger, no jingling of plates, no squeaks. Brakes. Foot brake - fairly good - no jaggers noticeable, Side brake - poor. Distance to pull up with 20 M.P.H. Foot brake 43'6" clutch out, brakes hard on. 30 M.P.H. Side brake 50' Foot brake 99'6" Side brake177' CONTD:- [STAMP] E F C FEB 1 1922 RECEIVED | ||