Comparison of Ducati 250 Diana 1961 and Velocette KTT Mk VIII 1939 [S]ave
| Attribute |  Velocette KTT Mk VIII 1939 × |  Ducati 250 Diana 1961 × |
|---|---|---|
| General | ||
| Production from (year) | 1939 | 1961 |
| Make | Velocette | Ducati |
| Model | Velocette KTT Mk VIII | Ducati 250 Diana |
| Category | Sport | Sport |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Fuel system | Carburettor. Amal | Carburettor. DellÓrto 29mm carbs |
| Displacement (cm³) | 348.4 | 249 |
| Power (kw) | 25.5 | 13.9 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 74 | 74 |
| Stroke (mm) | 81 | 57.8 |
| Fuel control | Overhead Valves (OHV) | Desmodromic valve control |
| Ignition | Bobine | - |
| Clutch | Wet multiplate | - |
| Lubrication system | Dry sump | - |
| Compression | 7.8:1 | 8.0:1 |
| Exhaust system | Single -Chrome | - |
| Chassis | ||
| Front suspension | - | Hydralic telescopic forks |
| Rear suspension | - | Dual choks |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Diameter (mm) | 178 | 160 |
| Frame type | Single cradle | - |
| Front tyre | - | 2.75-18 |
| Rear tyre | - | 3.00-18 |
| Seat | Dual | Dual seat |
| Wheels | Spoked | - |
| Other | ||
| Starter | Kick | Kick |
| Color options |
| - |
| Dimensions | ||
| Dry weight (kg) | 125 | 135 |
| Power/weight ratio | 0.204 | 0.103 |
| Performance | ||
| Top speed (km/h) | 185 | 150 |
| Fuel capacity (l) | 11.4 | 13 |
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