KTM 990 Duke (2024) vs Vespa 150 GS (1955-61)
Comparison technical specifications
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| Make: | KTM | Vespa |
| Model: | 990 Duke | 150 GS |
| Years: | 2024 | 1955-61 |
| Engine: | Four stroke, parallel twin cylinder, DOHC, 4 valve per cylinder | Two stroke, single cylinder |
| Capacity: | 947 cc / 57.8 cu-in | 145.5 cc / 8.8 cub in |
| Bore x Stroke: | 92.5 x 70.4 | 57 x 57 mm |
| Starting: | Electric | Kick start |
| Max Power: | 121 hp / 90.59 kW @ 9250 rpm | 6.0 kW / 8.2 hp @ 7500 rpm |
| Clutch: | PASC? antihopping clutch, mechanically operated | Wet, multiplate with cork inserts |
| Transmission: | 6-Speed | 4 Speed, grip-shift, constant mesh |
| Final Drive: | Chain 520 X-ring | Direct drive |
| Frame: | Chromium-Molybdenum-Steel frame using the engine as stressed element, powder coated | Pressed sheet steel, streamlined monocoque structure |
| Front Suspension: | WP APEX 43 | Stub axle with swining hub and variable rate coil spring and double action hydraulic damper |
| Rear Suspension: | WP APEX - Monoshock | Swinging bracket for engine and wheel, with variable rate coil spring and co-axial double action hydraulic damper |
| Front Brakes: | 2x 300mm discs, radially mounted 4-piston caliper | Drum, expanding type with cooling ribs |
| Rear Brakes: | Single 240 mm disc,, 2-piston caliper | Drum, expanding type with cooling ribs |
| Front Tyre: | 120/70-17 | 3.5 x 10" |
| Rear Tyre: | 180/55-17 | 3.5 x 10" |
| Wheelbase: | 1476 mm / 58.1 in | 1180 mm / 46.4 in |
| Ground Clearance: | 195 mm / 7.7 in | 285 mm / 11.2 in |
| Fuel Capacity: | 14.8 litres / 3.9 US gal | 12 L / 3.17 US gal |