The Rolls-Royce 25/30 was built between 1936 and 1938 as an updated version of the 20/25 with a larger engine to provide more power. The in-line 6-cylinder, overhead-valve 25/30 hp engine is similar to that used in the 20/25 but increased in capacity to 4,257 cc by increasing the bore from 3.25 inches to 3.5 inches , with the stroke remaining at 4.5 inches. The compression ratio is 6:1. A single proprietary Stromberg downdraught carburettor replaced the Rolls-Royce unit, and magneto ignition was no longer fitted, but a standby coil was provided. The four-speed gearbox is mounted in unit with the engine, and a traditional right-hand change used. Synchromesh is fitted to third and top gears. The riveted chassis has rigid front and rear axles suspended by half-elliptic springs with hydraulic dampers. Braking is on all four wheels assisted by a mechanical servo, famously under licence of Hispano-Suiza.
Separate rear brakes are fitted for the handbrake. The traditional Rolls-Royce radiator with triangular top was used with vertical louvres, the opening angle of which is controlled thermostatically to control engine cooling.
1,201 chassis were made over the 3 year model run.
This car is overall in excellent condition with great paint, interior and bright work. A rare Sunroof model, the car has a known history and was in excellent running condition when acquired by the seller. The engine had an issue and was dissassembled for rebuild. During the process of relining the cylinders the block cracked. The seller at this point just wishes to pass the car on to someone else to complete the job. All parts that were on the car go with the car to the buyer.