Coys Auction - Spring Classics
Royal Horticultural Halls
Elverton St
Westminster
London SW1
Tuesday 8 March 2011
Estimate: £22,000 - £30,000
Registration Number: VH 7756
Chassis Number: TBA
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 a twenty percent increase in the 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 20hp, the 20/25 was warmly received and proved immensely popular, soon more than doubling sales of the big Phantom II. As always with Rolls-Royce, many detail improvements were made to the 20/25 during its seven year production life, including rises in compression ratio in 1930 and 1932; the latter year also saw the introduction of synchromesh for the third and fourth gear ratios, thermostatically controlled radiator grille shutters,