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).
Specification sheet detailing vehicle performance, including petrol consumption, gearbox ratios, and chassis components.
| Identifier | ExFiles\Box 127\5\ scan0065 | |
| Date | 7th October 1940 | |
| - 3 - Petrol consumption alleged. 20 MPH. Not given. Actual 20 MPH. 49.9 MPG. 30 " 52 MPG. 30 " 48.6 " 40 " 45 " 40 " 44.2 " 50 " 36 " 50 " 39.3 Average on long run alleged. 45 MPG. Actual over 100 Mls. 33.8 MPG. Gearbox 3 speed. Reverse - 23.08 1st gear - 18.75 2nd gear - 8.63 Top gear - 5.14 Engine speeds at 10 MPH. Reverse - 3192 R.M. 1st gear - 2592 " 2nd gear - 1192 " Top gear - 710 " Propeller shaft, Hardy Spicer (needle roller bearings). Rear Axle - semi-floating type - 80 ton alloy steel casing pressed steel. Final drive spiral bevel gears - 75 ton case hardened alloy steel. Differential - two bevel pinions. Brake, Bendix, Duo-Servo. Hand or foot to all wheels by enclosed cables. Steel brake drums FRONT 1¼" x 8" REAR 1½" x 6" Suspension. Independent FRONT 36½" x 2½". REAR 39" x 1½". Tyres E.L.P. 4.75 x 16. Shock absorbers piston type. Steering - Burman-Douglas worm and nut. Wheel dia. 16½". | ||