As the final pre-war Rolls-Royce introduced to the market, the 1937 Rolls-Royce Phantom III which was initially introduced in 1936, offered several features the predecessor Phantom II lacked. Other than the fact that the 1937 Rolls-Royce Phantom III was the only V12 Royce introduced until 1998, it also offered a 4- speed manual transmission, was classified as a Luxury car, and offered a unique design style in the design of the body. It is also powered by aluminum-alloy V12 engine, featured a pushrod engine with overhead valves, and was operated by a single camshaft. The 1937 Rolls-Royce Phantom III was also an unusual auto in the time, due to the two ignition systems, two distributors, two coils, and having 24 spark plugs to run the engine.

The on-board jacking and one-shot chassis lubrication system are operated by an internal lever which is in the driver’s side. The 4- speed transmission featured syncromesh on the second through fourth gear as well. The body of the car was made by a fitted coach builder, which was selected by the purchasers, and most of the bodies were designed by larger companies, which Rolls-Royce worked with on a consistent basis including: Park Ward, Hooper, Mulliner, and Thrupp & Marberly. The car was able to attain speeds from 0 to 60 in 16.8 seconds, and reached a max speed of 87.5 miles per hour; additionally, it consumed approximately 10 miles per gallon in the high way, and only 8.4 miles per gallon when driving in the city.