Alfa Romeo RM

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Alfa Romeo RM
Alfa Romeo RM Sport Castagna.jpg
Alfa Romeo RM Sport with Castagna body
Manufacturer Alfa Romeo
Production 1923–1925
Assembly Portello, Milan, Italy
Body and chassis
Body style limousine
Layout FR layout
Engine 1.9 L I4
2.0 L I4
Transmission 4-speed manual[1]
Wheelbase 2,900 mm (114.2 in) (RM Sport)
Length 4,250 mm (167.3 in)
Width 1,680 mm (66.1 in)
Height 1,650 mm (65.0 in)
Curb weight 1,450 kg (3,197 lb)
Predecessor Alfa Romeo RL
Successor Alfa Romeo 6C

Alfa Romeo RM was produced between 1923–1925, it was based on RL model. Car was introduced first time in 1923 Paris Motor Show and total production was around 500 cars. RM had 2.0 L straight-4 engine, which produced between 40 bhp (30 kW) to 48 bhp (36 kW). As most of Alfa Romeo cars this was also used in racing purpose. Three versions was made: Normal, Sport and Unificato. Sport had raised compression ratio and Unificato had longer wheelbase and slightly bigger engine. RM top speed was around 90 km/h (56 mph).


  • RM Normal, 1944 cc 40 bhp (1923)
  • RM Sport, 1944 cc 44 bhp (1924)
  • RM Unificato, 1996 cc 48 bhp (1925)

Alfa Romeo half-track[edit]

A very rare half-track version based on RM was built in 1920s. The half-track used RM straight-4 engine modified to work with dry sump lubrication. The track used was Citroën Kegresse licensed, only one example is known survive.[2][3]


  1. ^ "Technical specifications of 1924 Alfa Romeo RM Sport". Archived from the original on 5 February 2008. Retrieved 2008-01-04. 
  2. ^ "1924 Alfa Romeo RM Four Wheel Drive half-track Torpedo". Retrieved 2011-12-17. 
  3. ^ "1924 Alfa Romeo RM Four Wheel Drive Winter Sports half-track". Retrieved 2007-12-22. 


Borgeson, Griffith (1990). The Alfa Romeo Tradition. Haynes (Foulis) Publishing Group Ltd. Somerset, UK. ISBN 0-85429-875-4.