Bugatti Type 46, 46S
5 Litre Luxury Model

Identifying features
Large size, 20 ins wheels

Years made
T46 = End 1929-32
T46S = 1930-33

Number made
T46 = 444
T46S = 18

Engine
No. of cylinders: 8
Bore x stroke: 81 x 130mm
Capacity: 5,359cc
BHP (approx): T46 140; T46S 160
RPM limit (prudent): 3,500
Camshafts (overhead): 1
Valves per cylinder: 3
Camshaft drive: Front, bevel
Crankshaft bearings (no. & type): 9 plain, plain rods
Supercharger: Roots, T46S only
Carburettor: 1 Smith multi-jet
Ignition: Coil
Plugs per cylinder: 2
Firing order: 1, 6, 2, 5, 8, 3, 7, 4

Clutch
Type: Dry multi-disc

Gearbox
Location: In rear axle
No. of speeds (+ reverse): 3
Gear change lever: Central, ball type

Rear axle
Normal ration: 12/47 = 3.91

Dimensions
Wheelbase: 138 ins, 3.5m
Track: 55 ins, 1.4m
Chassis weight (approx): 2,500 lb, 1.150kg

Brakes
Location and type: 4-wheel cable operated, auto adjusters
Brake drum diameter: 16 ins

Wheels
Type: Early T46 wire; later and T46S cast alloy, vane type
Tyre size: Original 32 x 6; modern fitments 6.00 x 20

Crossbreeding with other Types
Chassis, radiator, rear axle and gear box as on (long wheelbase) T50