SPECS
ENGINE:
4 Opposed Cylinders, 4 Stroke, Fed by a Supercharger
Bore:
55.5 mm
Stroke:
68 mm
Displacement:
658 cc
Power:
65 hp
Revolutions:
600 to 6000 RPM
CRANKCASE-CYLINDERS:
Aluminium, Steel sleves
PISTONS:
Special Aluminium aloy
CRANKSHAFT:
Hardened nitrated steel on 3 journals
CRANKCASE:
Aluminium , entirely grooved
SUPERCHARGER:
"Soriano" , 2 blades spinning @ 1.75 times engine RPM
VALVES:
Overhead, directly actuated by cam shafts
OIL PUMP:
Lubrication under pressure
IGNITION:
Battery
CARBURETOR:
"Solex" Special
COOLING:
Water cooled
TRANSMISSION:
Big diameter sfaft, lightened and drilled, mounted entirely on ball bearings
PROPULSION:
Dual counter rotating propellers (Patented)
GAS TANK:
With purging system
PRICE:
29'000 francs (January 1st 1931)
SPECIAL CONDITIONS:
10 to 30 % down payment to the members of the Bayonne Canot-Club
MISC:
In order to be allowed to participate in the standard class, it is possible to remove the supercharger, and change the overhead cam shafts.
4 cylinder Soriano 1929-30

Soriano Nr. 511 as discovered, with original gas tank.
A Diamond in the rough.

Internals of the 4 cylinder Soriano... Nr 515

This early 4 cylinder Soriano was raced by Swedish racer
Eric Pehrson.
Early 4 cylinder with 4 nuts on Cylinder Head covers, and
not full casted eshaust. (held together by bolts)