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 of vehicle dimensions between model B.3 and a 3½ Litre Jaguar, proposing an increase in body width.
| Identifier | ExFiles\Box 97\1\ scan0149 | |
| Date | 26th April 1938 | |
| - 2 - Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork}29/G.26.4.38. We propose that on S.B.3 the third car, we increase the width of the rear of the body to equal the Jaquar. We cannot do this on 2.B.3 as it is too far advanced. Dimension. B.3. 3½ Litre Jaquar. Increase of B.3 over Jaquar. Overall Height 63.400 61.250 + 2.150 Overall Length (over bumpers) 15ft.9¾" 15ft.6in. + 3.5 ins. Wheelbase 10ft.4ins. 10ft.0in. + 4.0 ins. Dash to Rear Wheels. 89.500 91.375 - 1.875 Dash to Bottom of Steering wheel. 34.000 33.875 + .125 Dash to Top of Rear Squab board. 97.000 94.500 + 2.500 Bottom of Steering Wheel to front of Rear Cushion. 30.250 28.500 + 1.750 Elbow width 5" behind bottom of wheel. 50.000 49.500 + .500 Elbow width at Rear Seat 53.000 56.500 - 3.500 Rear cushion width between arm rests. 46.000 44.500 + 1.500 Headroom, rear floor to roof. 47.000 44.500 + 2.500 Rear floor to ground. 14.150 14.500 - .350 Back of centre pillar to face of rear cushion. 11.750 11.500 + .250 Bonnet width at dash. 37.500 37.500 --- Angle of Taper of side in plan. 12° 13½° - 1½° Back of Radiator to dash 37.700 30.700 + 7.000 | ||