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BMW 309

Date of manufacture 1934 – 1936
Bodywork type(s) Saloon, Cabrio-saloon, Cabriolet and Tourer
Engine Type Inline 4 cylinder
Capacity 845cc
Bore x stroke 58mm x 80mm
Power 22 bhp @ 4000 rpm
Compression 5.6:1
Carburettors 1, Solex 26 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 10 with 180 mm dia.)
Gearbox ratios Hurth
1st 4.42:1
2nd 2.54:1
3rd 1.65:1
4th 1.00:1
Axle ratio 5,85
Synchromesh 3rd and 4th
Chassis Frame Lightweight “A”- frame with two longitudinal tubular members, diameter varying from 90 mm to 60 mm load depending, and three rectangular cross members
Suspension Front: Transverse leaf spring with lower wishbones and integral single 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   cable ( Bendix )
Handbrake, cable on rear wheels
Dimensions Wheelbase 2400mm
Track front/rear 1153mm/1220mm
Length/width 3900mm x 1440mm
Tyres 5.25 x 16
General Fuel capacity 35 litres
Max speed 50 mph
Number produced 6000
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