| MODEL | BMW R 80G/S PROTOTYPE 1979 |
| Year | 1979 |
| Engine Type | — |
| Displacement / Capacity | — |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | — |
| Max Power | — |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | — |
| Clutch | — |
| Final Drive | — |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | — |
Before the R 80 G/S reached showrooms, BMW's testing department built off-road boxer prototypes as an unofficial project, largely from existing parts: an R 80/7 engine, an R65-based frame and borrowed forks and wheels. Engineer Laszlo Peres raced a self-built 800 cc enduro with success in German competition, which helped convince management in 1979 to approve a production dual-purpose model.
