| Alfa Romeo RM | |
|---|---|
 Alfa Romeo RM Sport withCastagna body | |
| Overview | |
| Manufacturer | Alfa Romeo |
| Production | 1923–1925 |
| Assembly | Portello, Milan, Italy |
| Body and chassis | |
| Body style | limousine convertible |
| Layout | FR layout |
| Powertrain | |
| Engine | 1.9 LI4 2.0 LI4 |
| Transmission | 4-speed manual[1] |
| Dimensions | |
| 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) |
| Chronology | |
| Predecessor | Alfa Romeo RL |
| Successor | Alfa Romeo 6C |
TheAlfa Romeo RM was produced between 1923 and 1925, based on theRL model. It was introduced for the first time at the 1923Paris 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).
| Model | Engine displacement | Max power | Years produced |
|---|---|---|---|
| RM Normal | 1944 cc | 40 PS (29 kW) | (1923) |
| RM Sport | 1944 cc | 44 PS (32 kW) | (1924) |
| RM Unificato | 1996 cc | 48 PS (35 kW) | (1925) |
A very rarehalf-track version based on the RM was built in the 1920s. The half-track used the RM's inline-four engine modified to work with dry sump lubrication. The track used was licensed to CitroënKegresse; only one example is known to survive.[3][4]
Borgeson, Griffith (1990).The Alfa Romeo Tradition. Haynes (Foulis) Publishing Group Ltd. Somerset, UK.ISBN 0-85429-875-4.
