Comparison of Aermacchi 250 Ala Verde Serie 1 1959 and BMW R20 1938 [S]ave
| Attribute |  Aermacchi 250 Ala Verde Serie 1 1959 × |  BMW R20 1938 × |
|---|---|---|
| General | ||
| Production from (year) | 1959 | 1938 |
| Make | Aermacchi | BMW |
| Model | Aermacchi 250 Ala Verde Serie 1 | BMW R20 |
| Category | Sport | Allround |
| Engine and transmission | ||
| Engine type | Single cylinder, four-stroke | Single cylinder, four-stroke |
| Fuel system | Carburettor. DellÓrto | Carburettor |
| Displacement (cm³) | 246.2 | 192 |
| Power (kw) | 11.7 | 5.9 |
| Cooling system | Air | Air |
| Transmission type,final drive | Chain | Shaft drive (cardan) |
| Bore (mm) | 66 | 63 |
| Stroke (mm) | 72 | 64 |
| Gearbox | 4-speed | 3-speed |
| Fuel control | - | Overhead Valves (OHV) |
| Ignition | - | Battery |
| Clutch | Wet multiplate | Dry-multiplate-cable operated |
| Lubrication system | - | Wet sump |
| Compression | 8.5:1 | 6.1:1 |
| Chassis | ||
| Front suspension | Telescopic -Geriani | Telescopic fork |
| Rear suspension | Swingarm-two shocks | Rigid |
| Front brakes | Expanding brake (drum brake). Simplex | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake). Simplex | Expanding brake (drum brake) |
| Diameter (mm) | 180 | 160 |
| Frame type | Single cradle | Steel-single cradlel |
| Front tyre | 2.50-17 | 2.99-19 |
| Rear tyre | 2.50-17 | 2.99-19 |
| Seat | Dual | Solo seat with springs |
| Wheels | Spoked | - |
| Other | ||
| Starter | Kick | Kick |
| Dimensions | ||
| Wheelbase (mm) | 1,270 | 1,330 |
| Kerb weight (kg) | - | 130 |
| Dry weight (kg) | 114 | - |
| Power/weight ratio | 0.1026 | - |
| Overall height (mm) | 910 | 900 |
| Overall length (mm) | 1,938 | 2,000 |
| Overall width (mm) | 762 | 800 |
| Performance | ||
| Top speed (km/h) | 140 | 95 |
| Fuel capacity (l) | 17 | 12 |
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