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Official BMW Club

Official BMW Club

Official BMW Club

BMW 303

BMW 303

Date of manufacture

1933 – 1934

Bodywork type(s)

Saloon, Cabrio-saloon, Cabriolet and Tourer


Type Inline 6 cylinder

Capacity 1173cc

Bore x stroke 56mm x 80mm

Power 30bhp @ 3500rpm

Compression 5.6:1

Carburettors 2, Solex 26 mm up draught

Valve design Overhead, 2 per cylinder

Valve gear Camshaft in block. Rockers, tappets and springs

Electrics 6 volt


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 5.15

Synchromesh 3rd and 4th


Frame Lightweight “A”- frame with two longitudinal tubular members,

diameter varying from 90mm 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 Bendix cable Handbrake, cable on rear wheels


Wheelbase 2400mm

Track front/rear 1153mm/1220mm

Length/width 3900mm x 1440mm

Tyres 5.25 x 16


Fuel capacity 35 litres

Max speed 56 mph

Number produced 2300

Club Mailing Address

BMW Historic Motor Club
Lower Norgrove,
Yarrington Road,

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