16-valve Brescia, or Brescia Modifié
Identifying features:
H-section front axle, front brakes unusual, carburettor on left hand side, exhaust right hand side – a unique arrangement on a Bugatti
Years Made (approx): 1914-26
Number made: 2,000
Engine:
No of cylinders: 4
Bore x stroke: 66, 68, 69 x 100mm
Capacity: 1368, 1453, 1496cc
BHP (approx): 30+
RPM limit (prudent): 4000 or even 4500 on a good Brescia
Camshaft: sohc
Valves (per cylinder): 4
Camshaft drive: Front, bevel
Crankshaft bearings, No. and Type: Early, 3 plain; later 2 BB, 1 plain; plain rods*
Carburettor: 1 or 2 Zenith
Ignition: 1 or 2 Magnetos, usually SEV
Plugs per cylinder: 1 or 2
Firing Order: 1, 2, 4, 3
Clutch:
Type: Wet, multi-plate
Gearbox:
Location: Central, separate, 4-speed and reverse
Gear change lever: Right hand, Top forward
Rear Axle:
Normal Ratio: 14/45, 13/45, 12/45 = 3.2, 3.46, 3.75
Dimensions:
T13 Wheelbase: 2.0m** 78.75in
T22 Wheelbase: 2.4m*** 94.5in
T23 Wheelbase: 2.55m 100.4in
Track: 45.3in (1.15m)
Chassis weight (approx): 1350lb (610kg)
Brakes:
Location and Type: Foot, transmission; right hand, rear: FWB in 1926
Wheels:
Type: wire
Tyre size: original 710 x 90; modern fitment 4.50 x 19
Crossbreeding with Other Types:
Same chassis as 8-valve cars; long chassis used on early T30; 1924/6 Brescia axles and radiator similar to T30
* Ball bearing type can be identified by larger housing boss at rear of crankcase
** Sometimes quoted as 1967mm (77.5in)
*** Sometimes quoted as 2417mm (95.2in)
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