| MODEL | BMW R 67/3 WITH SIDECAR 1955 - 1956 |
| Year | 1955 - 1956 |
| Engine Type | Four stroke, two cylinder horizontally opposed boxer, pushrod operated OHV, 2 valves per cylinder |
| Displacement / Capacity | 594 cc / 36.2 cu in |
| Bore X Stroke | 72 x 73 mm |
| Compression Ratio | 6.5:1 |
| Cooling System | Air cooled |
| Max Power | 20.9 kW / 28 hp @ 5600 rpm |
| Max Torque | — |
| Ignition | Magneto |
| Induction | 2 x Bing 24 mm carburettors (1/24/25 - 1/24/26) |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4 Speed |
| Clutch | Single plate, dry |
| Final Drive | Shaft |
| CHASSIS SPECS | |
| Frame | Double loop tubular steel |
| Front Suspension | Telescopic fork with hydraulic damping |
| Rear Suspension | Plunger with coil springs and rubber stops |
| Front Brakes | 200 mm drum, duplex, full-width hub |
| Rear Brakes | 200 mm drum, simplex, full-width hub |
| DIMENSION SPECS | |
| Overall Length | 2130 mm / 83.9 in |
| Overall Width | 790 mm / 31.1 in |
| Overall Height | 985 mm / 38.8 in |
| Seat Height | 725 mm / 28.5 in |
| Wheelbase | 1400 mm / 55.1 in |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | 192 kg / 423 lbs (solo); 320 kg / 705 lbs with sidecar |
| WHEEL SPECS | |
| Front Tyre | 3.50-19 |
| Rear Tyre | 3.50-19 (sidecar wheel 4.00-18) |
| FUEL SYSTEM | |
| Fuel Capacity | 17 Litres / 4.5 US gal |
| Fuel Consumption | 4.6 L/100 km |
| Top Speed | 145 km/h / 90 mph |
Photo: Jeff Dean, Attribution only (free use with credit to the author), via Wikimedia Commons
The final plunger-framed BMW, built for 1955-56 and sold from the factory only as a sidecar outfit after the swing-arm R 50 and R 69 had replaced the solo models. It carried over the R 67/2's 28 hp engine and duplex front brake largely unchanged. Its withdrawal in 1956 ended the plunger-suspension era that BMW had begun in 1938.
