• A rear view of a 550 Spyder with racing decals.
  • A rear quarter view of a 550 Spyder, showing the flare-like trails.
  • A front quarter view of a 550 Spyder.

The Porsche 550 was a 2 - door sports car produced by Porsche from 1953-1956.


1955 Porsche RS550

List price (1955): US$6,800.00

A table of the 550's specifications.
Design: Four cylinder air cooled, horizontal opposed, 4 overhead camshafts


Approximately 110 PS (81 kW) at 6200 rpm
Bore: 3.35 in (85mm)
Stroke: 2.59 in (66mm)
Piston Displacement: 1,498 cc (91.4 cu in)
Compression ratio: 9.5:1
Crankcase: Aluminium
Cylinders: Aluminum hard chromed walls
Cylinder head: Aluminium
Valves per cylinder: 1 intake, 1 exhaust
Valve operation: 4 camshafts driven by 2 vertical shafts.
Crankshaft: Full roller bearing, built up
Pistons: Aluminium
Air blower drive: V-belt, crankshaft to generator shaft
Crankshaft-blower ratio: 1:1
Air volume: 1100 ltr/sec at 6200 RPM
Engine lubrication: Dry sump, with oil cooler and oil filter in main current
Firing Order: 1-4-3-2
Distributor Drive: Camshaft
Spark Plugs : Temperature valve 260 - 280
Carburetors : Solex 40 PJJ or Weber 40 DCM
Muffler 2 mufflers leading into 1 exhaust pipe
Clutch : Fichtel & Sachs, K 12 Porsche Special
Transmission : 4 forward speeds, helical gears, synchronised, 1 reverse
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