Swallow Doretti (1954-55)

The Car

Coming soon

The Specs

Below are the technical specifications and any performance numbers we could get.


Bore & Stroke 83mm x 92mm
Displacement 1991cc
Firing order 1,3,4,2
Oil pressure (hot)

Fuel Supply

Carburetor Twin SU
Standard needles FV
Competition needles GC


Intake tappet clearance 0.010″ (cold)
Exhaust tappet clearance 0.012″ (cold)
Valve-timing indication
Intake valve opens 15° BTDC with 0.015″ tappet checking clearance


Breaker gap 0.015″
Plug gap 0.032″
Ignition timing indication
Ignition timing 4° BTDC (fully retarded)


Clutch type Borg & Beck Single Dry Plate
Clutch linings


Brake type Lockheed Hydraulic
Brake linings

Wheel Alignment

Toe-In 18
Camber 2° (static laden)
Caster angle
King pin angle