| Attribute | Triumph Terrier 150 1954 × | Aermacchi HD 150 Zeffiro 1959 × |
|---|---|---|
| General | ||
| Production from (year) | 1954 | 1959 |
| Make | Triumph | Aermacchi |
| Model | Triumph Terrier 150 | Aermacchi HD 150 Zeffiro |
| Category | Sport | Scooter |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, two-stroke |
| Fuel system | Carburettor. Amal | Carburettor. DellÓrto |
| Displacement (cm³) | 150 | 148 |
| Power (kw) | 6.1 | - |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Chain |
| Bore (mm) | 57 | 57 |
| Stroke (mm) | 58.5 | 58 |
| Gearbox | - | 3-speed |
| Fuel control | Overhead Valves (OHV) | - |
| Clutch | - | Wet multiplate |
| Compression | 7.1:1 | 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 | 3-16 | 3-17 |
| Rear tyre | 3-16 | 3-17 |
| Seat | Dual | Two single seats |
| Wheels | Spoked | - |
| Other | ||
| Starter | - | Kick |
| Performance | ||
| Top speed (km/h) | 80 | 90 |