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).
Graph comparing the top gear acceleration performance of various car models.
| Identifier | ExFiles\Box 113\2\ scan0153 | |
| Date | 27th April 1929 guessed | |
| TOP GEAR ACCELERATION S.S (20 Ex): --- 12G IV (20' ON BORE) TURB. HEAD CHRYSLER .- R = 5.25:1 LITRES/TON/MILE 12 G IV :- 6826 CHRYSLER:- 6757 20 Ex :- 7341 ROAD SPEED M.P.H. TIME SECS. AV. STANDARD 20 H.P 12 G.IV: 31CWT 1QR 7 LBS CHRYSLER: 32CWT 2QR 21 LBS 20 Ex: 47CWT 3QR 0 LBS | ||