Specifications
BMW “Wartburg” (Da 3)
Date of manufacture
1930 – 1931
Bodywork type(s)
Sports
Engine
Type Inline 4 cylinder
Capacity 748cc
Bore x stroke 56mm x 76mm
Power 18bhp @3500rpm
Compression 7.0:1
Carburettors 1, Solex 26 mm updraught
Valve design Side valve
Valve gear Camshaft drive with spur gear wheels
Electrics 6 volt
Transmission
Clutch Dry single disc
Gearbox ratios 1st 3.25:1
2nd 1.82:1
3rd 1.00:1
Axle ratio 5.35 or 4.90
Synchromesh None
Chassis
Frame “A” shaped frame with ‘U’ section side members, friction dampers
Suspension Front: Dropped beam axle & 1 transverse leaf spring, friction dampers
Rear: Quarter outrigger leaf springs
Steering Worm
Brakes Four wheel cable
Handbrake: cable to front wheels
Dimensions
Wheelbase 1905mm
Track front/rear 1000mm/1030mm
Length/width 3150mm x 1150mm
Tyres 26 x 3.5in
General
Fuel capacity 20 litres
Max speed 59 mph
Number produced 150
Club Mailing Address
BMW Historic Motor Club
Lower Norgrove,
Yarrington Road,
Alfrick,
Worcestershire.
WR6 5EX