Years Made
(approx): T57: 1934-40; T57C: 1937-40

Number Made:
630

Engine:
No of cylinders: 8
Bore x stroke: 72 x 100mm
Capacity: 3257cc
BHP (approx): T57: 135; T57C: 160
RPM Limit (prudent): 5000
Camshafts: dohc
Valves (per cylinder): 2
Camshaft drive: Rear, spur train, helical
Crankshaft bearings: 6 plain, plain rods
Supercharger (Roots): 57C only
Carburettor: Stromberg UUR2
Ignition: Coil
Plugs per cylinder: 1
Firing Order: 1, 6, 2, 5, 8, 3, 7, 4

Clutch:
Type: Dry, single-plate; double reduction lever (1939)

Gearbox:
Location: Integral with engine, 4-speed and reverse
Gear change lever: Central, top back

Rear Axle:
Normal Ratio: Early 12/50 = 4.16
Later 11/46 = 4.18

Dimensions:
Wheelbase: 130in (3.3m)
Track: 53.1in (1.35m)
Chassis Weight (approx): 2100lb (950kg)

Brakes:
Location and Type: 4-wheel, 1934-7 cable operated: 1938-40 hydraulic
Brake drum diameter: 350mm

Wheels:
Type: Rudge wire
Tyre size: Original and modern fitment: 18 x 5.50

Crossbreeding with Other Types:
Engine basically as used on T59 GP cars. T57S and T57SC are direct derivatives