The Alfa Romeo RM is a limousine / convertible from Alfa Romeo, built from 1923 to 1925, the vintage years, when coachbuilders still shaped most of what was sold. Under the bonnet: 1.9 .
The background
The Alfa Romeo RM was produced between 1923 and 1925, based on the RL model. It was introduced for the first time at the 1923 Paris Motor Show and total production was around 500 cars. The RM had a 2.0 L inline-four engine which produced between 40 and 48 PS (29 and 35 kW).
As were most of Alfa Romeo's cars, this was also used in motorsports. Three versions were made: Normal, Sport and Unificato. Sport had a raised compression ratio, and Unificato had longer wheelbase and a slightly bigger engine. The RM's top speed was around 90 km/h (56 mph).
The engineering
Power comes from 1.9 other versions carried different engines, listed in the specification table below. It weighs 1450 kg. It shifts through a 4-speed manual. The layout matters: a front engine drives the rear wheels, the classic proportion — long bonnet, cabin set back — that most people picture when they picture a sports saloon or a grand tourer. The wheelbase is 2900 mm (RM Sport). These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
Where it sits
Its family tree is legible: it took over from the Alfa Romeo RL; its successor was the Alfa Romeo 6C; assembly was at Portello, Milan, Italy. Its contemporaries in the catalogue — the Renault KZ, the Renault KJ, the Tatra 11 — show what else the money bought that year. Its Alfa Romeo stablemates include the A.L.F.A 12 HP and the A.L.F.A 15 HP.
What it costs now
There is no federal ownership record for the Alfa Romeo RM — it predates the complaint database or was never sold in the United States — so MotorJury publishes no running-cost figure for it. For a car of this age the price is set by the collector market and the condition of the individual example, not by a formula.