| Attribute | Value |
| General |
| Production from | 1936 year |
| Make | NSU |
| Model | NSU 251 OSL |
| Category | Sport |
| Engine and transmission |
| Engine type | Single cylinder, four-stroke |
| Valves per cylinder | Add |
| Fuel system | Carburettor |
| Engine details | Add |
| Displacement | 242 cm³ |
| Power | 7.7 kw |
| Max RPM | Add |
| Fuel consumption | 2.3 l/100km |
| Cooling system | Air |
| Transmission type,final drive | Chain |
| Torque | Add |
| Bore | 64 mm |
| Stroke | 75 mm |
| Gearbox | 4-speed |
| Greenhouse gases | 53.4 CO2 g/km. (CO2 - Carbon dioxide emission) |
| Fuel control | Add |
| Emission details | Add |
| Driveline | Add |
| Ignition | Battery-Bosch |
| Clutch | Add |
| Lubrication system | Add |
| Compression | Add |
| Exhaust system | Add |
| Chassis |
| Front suspension | Add |
| Rear suspension | Add |
| Front brakes | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) |
| Diameter | Add |
| Frame type | Open double steel |
| Front tyre | 3-19 |
| Rear tyre | 3-19 |
| Seat | Single spring-mounted |
| Wheels | Spoked |
| Front wheel travel | Add |
| Rear wheel travel | Add |
| Trail | Add |
| Rake (fork angle) | Add |
| Other |
| Battery capacity | Add |
| Starter | Kick |
| Color options | Add |
| Carrying capacity | Add |
| Light | Add |
| Instruments | Add |
| Electrical Voltage | Add |
| Dimensions |
| Wheelbase | 1,285 mm |
| Kerb weight | Add |
| Dry weight | 126 kg |
| Power/weight ratio | 0.0611 |
| Overall height | 1,000 mm |
| Overall length | 2,000 mm |
| Overall width | 760 mm |
| Seat height | Add |
| Alternate seat height | Add |
| Ground clearance | Add |
| Front percentage of weight | Add |
| Rear percentage of weight | Add |
| Performance |
| Top speed | 100 km/h |
| Acceleration 0-100 km/h | Add |
| Length | Add |
| Reserve fuel capacity | Add |
| Fuel capacity | 11.5 l |
| Oil capacity | 1.5 l |
| Width | Add |
| Height | Add |