Alfa Romeo RL / RM

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Alfa Romeo RL Targa Florio
Alfa Romeo RL Super Sport (1925)
Alfa Romeo RM Sport

Alfa Romeo RL and Alfa Romeo RM are automobiles that Alfa Romeo manufactured in the 1920s.

The RL with six-cylinder engine presented in 1922 , from which the RM with four-cylinder engine was derived, helped the company to break through in racing in 1923 with a double victory by Ugo Sivocci and Antonio Ascari in the Targa Florio long-distance race.

The in- line engine designed by Giuseppe Merosi has a side-mounted camshaft that operates the overhead valves via push rods and rocker arms . In the basic embodiments of the six-cylinder engine was 2916 cc and provided 41  kW (56  horsepower ) at 3200 min -1 , the four-cylinder had 1944 cc, yielding 29 kW (39 hp) at 3000 min -1 . Both the RL and the RM had variants with higher performance. The RL Super Sport 1925 made, for example, 61 kW (83 hp) at 3600 min -1 , which made him 130 km / h fast. The racing version of the RL for the Targa Florio from 1923 reached a speed of 157 km / h with a displacement of 3,154 cm³; In 1924, some models ran at 3620 cm³ (crankshafts with seven bearings) and 92 kW (125 PS) up to around 180 km / h.

Production of the RM began in 1923 and ended in 1925; a total of 500 pieces were produced. The RL was built until 1927 and had a number of 2,640 vehicles. Its successor was the Alfa Romeo 6C 1500 .

Technical specifications

RL Normale
1922 		RL Sport
1922 		RM Sport
1924 		RL Super Sport
1926
wheelbase 3430 mm 3124 mm 2900 mm 3140 mm
Gauge 1461 mm 1461 mm 1330 mm 1440 mm
Empty weight 1829 kg 1778 kg 1450 kg 1550 kg
Cylinder bore 75 mm 76 mm 76 mm 76 mm
Piston stroke 110 mm 110 mm 110 mm 110 mm
Displacement 2916 mm³ 2994 mm³ 1996 mm³ 2994 mm³
compression 5.2: 1 5.52: 1 6: 1 5.5: 1
Fuel supply 1 carburetor 2 carburettors 1 carburetor 2 carburettors
High performance 41.8 kW (56.8 HP)
at 3200 min -1 		52.9 kW (71.9 HP)
at 3500 min -1 		32.8 kW (44.6 HP)
at 3200 min -1 		65.6 kW (89.2 HP)
at 3600 min -1
cooling Water cooling
Top speed 110 km / h 121 km / h 100 km / h 150 km / h
Suspension Rigid axles with leaf springs
Brakes Rear drum brakes Drum brakes front and rear since September 1923
transmission 4 courses

Web links

Commons : Alfa Romeo RL  - collection of pictures, videos and audio files
Commons : Alfa Romeo RM  - Collection of pictures, videos and audio files

Individual evidence

  1. ↑ Targa Florio 1923. Stefan Örnerdal, accessed on July 25, 2019 (English).
  2. ↑ a b c d e 1920–1930. Alfa Romeo Australia, archived from the original on July 14, 2005 ; accessed on November 23, 2009 .
  3. ↑ Alfa Romeo RL Normal 21/70 hp Technical Specifications. Carfolio.com, accessed November 23, 2009 .
  4. ↑ Alfa Romeo RL Sport 22/90 hp Technical Specifications. Carfolio.com, accessed November 23, 2009 .
  5. ↑ Alfa Romeo RM Sport Technical Specifications. Carfolio.com, accessed November 23, 2009 .
  6. ↑ Alfa Romeo RL Super Sport Zagato Technical Specifications. Carfolio.com, accessed November 23, 2009 .