Specifications
BMW 321
Date of manufacture
1939 – 1941
Bodywork type(s)
2 door saloon and cabriolet
Engine
Type Inline six-cylinder
Capacity 1971cc
Bore x stroke 66mm x 96mm
Power 45bhp at 3750rpm
Compression 6.1:1
Carburettors 1, Solex 30 mm up draught
Valve design Overhead, 2 per cylinder
Valve gear Camshaft in block. Rockers, tappets and springs
Electrics 6 volt
Transmission
Clutch Dry single disc. ( Fichtel & Sachs, K 12 with 200 mm dia.)
Gearbox ratios
Hurth
1st 3.66:1
2nd 1.22:1
3rd 1.51:1
4th 1.00:1
Axle ratio 4.55
Synchromesh 3rd – 4th
Chassis
Frame Welded low floor chassis with box section side members
Suspension Front: Transverse leaf spring with upper wishbones
and integral double acting shock absorbers.
Rear: Longitudinal leaf springs with rigid axle
and lever arm double acting shock absorbers.
Foot operated one shot central oil lubrication system
Steering Rack and pinion
Brakes Four wheel hydraulic, self adjusting
Handbrake, cable on rear wheels
Dimensions
Wheelbase 2750 mm
Track front/rear 1300 mm/1300 mm
Length/width 4500 mm/1560 mm
Tyres 5.50 x 16
General
Fuel capacity 50 litres
Max speed 68 mph
Number produced 3692
Club Mailing Address
BMW Historic Motor Club
Lower Norgrove,
Yarrington Road,
Alfrick,
Worcestershire.
WR6 5EX