Coys Auction - The Spirit of Motor Cars
Ascot Racecourse,
Ascot,
Berkshire SL5 7JX

Saturday 4th October 2008
Motor Cars at 15:00

By the late 1920s the trend for ever-heavier coachwork on the Rolls-Royce 20HP had inevitably had a detrimental effect on performance. Rolls-Royce''s solution was to increase the comparatively small six cylinder engine''s capacity from just over three litres to 3,699cc which, together with a stronger crankshaft allowing increased rpm, raised its output to 25hp.

As with the 20 HP, the 20/25 was warmly received and proved immensely popular, soon more than doubling sales of the big Phantom II. Various detail improvements were made to the 20/25 during its seven year production life including rises in compression ratio and the introduction of synchromesh for the third and fourth gear ratios, thermostatically controlled radiator grille shutters, a one-shot centralised lubrication system and an electri