| Attribute | Value |
| General |
| Production from | 1955 year |
| Make | Simson |
| Model | Simson 425 T |
| Category | Allround |
| Engine and transmission |
| Engine type | Single cylinder, four-stroke |
| Valves per cylinder | Add |
| Fuel system | Carburettor |
| Engine details | Add |
| Displacement | 247 cm³ |
| Power | 8.8 kw |
| Max RPM | Add |
| Fuel consumption | Add |
| Cooling system | Air |
| Transmission type,final drive | Shaft drive (cardan) |
| Torque | Add |
| Bore | 68 mm |
| Stroke | 68 mm |
| Gearbox | Add |
| Greenhouse gases | Add |
| Fuel control | Add |
| Emission details | Add |
| Driveline | Add |
| Ignition | Magneto |
| Clutch | Add |
| Lubrication system | Add |
| Compression | Add |
| Exhaust system | Add |
| Chassis |
| Front suspension | Telescopic |
| Rear suspension | Add |
| Front brakes | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) |
| Diameter | 180 mm |
| Frame type | Steel |
| Front tyre | 3.25-19 |
| Rear tyre | 3.25-19 |
| Seat | Single |
| Wheels | Spoked |
| Front wheel travel | Add |
| Rear wheel travel | Add |
| Trail | Add |
| Rake (fork angle) | Add |
| Other |
| Battery capacity | Add |
| Starter | Add |
| Color options | Add |
| Carrying capacity | Add |
| Light | Add |
| Instruments | Add |
| Electrical Voltage | Add |
| Dimensions |
| Wheelbase | Add |
| Kerb weight | Add |
| Dry weight | 140 kg |
| Power/weight ratio | 0.0629 |
| Overall height | Add |
| Overall length | Add |
| Overall width | Add |
| 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 | 12 l |
| Oil capacity | Add |
| Width | Add |
| Height | Add |