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).
Comparison table of chassis specifications, including wheelbase, cylinders, and overall gear ratios for various models.
| Identifier | ExFiles\Box 153\4\ scan0020 | |
| Date | 12th January 1940 guessed | |
| CHASSIS, CYLS., WHEEL BASE., TYRE SECTION PAN, BENT OR PENDULUM STRAIGHT LEVER LENGTH, CAM ANGULAR RATIO, PROPOSED OVERALL RATIO, PRESENT OVERALL RATIO RR. Silver Phantom, 8, 11.1, 7.50, B, 6.050, 17.8, 18.95, 17.35 (underlined) RR. Silver Wraith, 6, 10.5½, 7.50, B, 6.050, 17.8, 18.95, - RR. Silver Dawn 80, 8, 10.10, 7.00, B, 6.050, 17.8, 18.95, 17.35 RR. Silver Dawn 60, 6, 10.2½, 7.00, B, 6.050, 15.83, 16.87, - 2.B.50 & 3.B.50, 6, 10.10, 7.00, S, 4.825, 15.83, 18.35 (handwritten and struck through), 16.32 BEN. Cresta, 8, 10.10, 7.00, B, 6.050, 15.83, 16.87, 19.13 Bentley Comet, 8, 10.4, 6.500, B, 6.050, 15.83, 16.87, 17.35 Bentley V (Clipper & Corniche), 6, 10.4, 6.50, S, 5.325, 15.83, -, 14.80 RR. Silver Ripple, 6, 10.4, 6.50, S, 4.825, 15.83, -, 16.32 RR. Silver Ripplet, 6, 9.8½, 6.50, B, 6.050, 15.83, 16.87, - Ben. Bentlet & Cornichon, 6, 9.8½, 6.50, B, 6.050, 15.83, 16.87, - RR. Rippletto, 4, , 6.00, B, 6.050, 15.83, 16.87, - | ||