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).
Engine size and capacity for the Bensport engine compared to the Peregrine.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page030 | |
| Date | 1st July 1932 | |
| PER BAG. 84027. Sg.{Arthur F. Sidgreaves - MD} From Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} c. to PN.{Mr Northey} c. to WOr.{Arthur Wormald - General Works Manager} c. to E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}1/MA.1.7.32. x4553 BENSPORT ENGINE SIZE. The Peregrine engine with a bore and stroke of 2.725 x 4.125 has a capacity of 2364 cc. The proposed stroke for the Bensport has been reduced to 3.875 giving a capacity of 2220 cc, or 6% less than Peregrine. We consider it may be desirable that the capacity should be kept below 2300 cc. 30% is added to the capacity of supercharged engines in the regulations for road races. With a capacity of less than 2300 cc a car runs in the 3 litre class, the next class being up to 5 litres. We could however increase the bore to 2.76" to give a capacity of 2290 cc. This would increase the taxable rating by £1 above that of Peregrine. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||