Hello Matt. I'm sorrt that it has taken so long to post a reply. There has been quite a bit of activity behind the scenes, and I found some information on
http://www.rover.org.nz/pages/histpic/hind4.htm that complements Paul's reply which was in part compiled by our magazine Editor. :-
"For 1933, the 'Pilots' and 'Meteors' were given a thorough design overhaul by Maurice Wilks and Robert Boyle. They were also improved mechanically to match the new 'Ten Special' with many features that Spencer Wilks would standardise in future models. These cars had a new chassis, suspension, four speed constant mesh gearbox, freewheel unit, spiral bevel axles, flexible engine mounts, new radiator shell designs and the complex Lucas Startix electrical system which ensured that the starter would always come into operation every time the engine stalled.
Also in 1933 came a new unique underslung chassis frame, which allowed a much lower and more sporting body to be created. The first of these cars was the 'Speed Pilot', which was given a raised compression ratio, closely followed by a closed two-door four seater coupe from Carbodies, of Coventry. This model was known as the 'Hastings Coupe' and featured a four window cabin with notch-back shape including a spare wheel bootlid impression at the rear. It was fitted with the increased capacity 1577 cc six-cylinder engine that now ran three carburettors, and it was a car that made a big impact on the Wilks brothers." The Wilks Brothers were the MD(Spencer) and Chief Engineer (Maurice) who guided Rover through the 1930's and beyond.
The engine in the car you refer to was 2,595 cc, so it would have had an impressive turn of speed compared with the 14Hp (1577cc) engines. Unfortunately pre second world war Production records were destroyed during the air raid on Coventry in November 1940, and the information we have is as a result, rather sketchy. The club has a record supplied by members of a couple of 20 Speed Hastings Coupes, that were registered in 1933.
If you post some further details of your Father's car we can check and see if it is known to the RSR.
Best Wishes
Mike Maher
Chairman