Comparison of Aermacchi HD 150 Zeffiro 1956 and Lambretta SX 150 1969 [S]ave
| Attribute |  Lambretta SX 150 1969 × |  Aermacchi HD 150 Zeffiro 1956 × |
|---|---|---|
| General | ||
| Production from (year) | 1969 | 1956 |
| Make | Lambretta | Aermacchi |
| Model | Lambretta SX 150 | Aermacchi HD 150 Zeffiro |
| Category | Scooter | Scooter |
| Engine and transmission | ||
| Engine type | Single cylinder, two-stroke | Single cylinder, two-stroke |
| Fuel system | Carburettor. DellÓrto | Carburettor. DellÓrto |
| Displacement (cm³) | 150 | 148 |
| Power (kw) | 6.4 | 4.4 |
| Cooling system | Air | Air |
| Transmission type,final drive | - | Chain |
| Bore (mm) | 57 | 57 |
| Stroke (mm) | 58 | 58 |
| Gearbox | - | 3-speed |
| Clutch | - | Wet multiplate |
| Compression | 7.0:1 | 6.5:1 |
| Chassis | ||
| Front suspension | - | Telescopic |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Front tyre | 3.50-10 | 3-17 |
| Rear tyre | 3.50-10 | 3-17 |
| Seat | Dual | Two single seats |
| Wheels | Spoked | - |
| Other | ||
| Starter | Kick | Kick |
| Dimensions | ||
| Dry weight (kg) | 109 | 92 |
| Power/weight ratio | 0.0583 | 0.0478 |
| Performance | ||
| Top speed (km/h) | 96 | 90 |
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