Vespa 150 / 150 Super (1954-60) vs Yamaha XT 550 (1983) vs KTM 990 Super Duke R (2009) vs Moto Guzzi V 35II (1981-84)
Comparison technical specifications
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| Make: | Vespa | Yamaha | KTM | Moto Guzzi |
| Model: | 150 / 150 Super | XT 550 | 990 Super Duke R | V 35II |
| Years: | 1954-60 | 1983 | 2009 | 1981-84 |
| Engine: | Two stroke, single cylinder | Four stroke, single cylinder, SOHC, 4 valve | Four stroke, 75°V-twin cylinder, DOHC, 4 valves per cylinder | Four stroke, 90° V twin, longitudinally mounted, OHV, 2 valve per cylinder |
| Capacity: | 145.5 cc / 8.8 cub in | 558 cc / 34.0 cu-in | 999.8 cc / 60.9 cu-in | 346.2 cc / 21.1 cu-in |
| Bore x Stroke: | 57 x 57 mm | 92 X 84 mm | 101 x 62.4mm | 66 x 50.6 mm |
| Ignition: | 6 pole flywheel magneto | CDI | Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment | Electronic |
| Starting: | Kick start | Kick | Electric | Electric |
| Max Power: | 4.0 kW / 5.4 hp | 38 hp / 27.7 kW @ 6500 rpm | 130.hp / 96.9 kW @ 10000 rpm | 35 hp / 26 kW @ 8100 rpm |
| Transmission: | 3 Speed, grip-shift, constant mesh | 5 Speed | 6 Speed | 5 Speed |
| Final Drive: | Direct drive | Chain | Chain, X-Ring 5/8 x 5/16" | Shaft |
| Front Suspension: | Helicoidal spring and hydraulic shock absorber | 38mm Air assisted forks | 48mm WP USD adjustable | Telehydraulic forks |
| Rear Suspension: | Helicoidal spring and hydraulic shock absorber. If fitted with sidecar: wo helicoidal springs on the sidecar | Monoshock adjustable preload | WP shock, fully adjustable | Swinging arm with hydraulic dampers |
| Front Brakes: | Drum, expanding type with cooling ribs | Drum | 2x 320mm discs 4 piston calipers | 2x 260mm discs |
| Rear Brakes: | Drum, expanding type with cooling ribs | Drum | Single 240mm disc 2 piston caliper | Single 235mm disc |
| Front Tyre: | 3.5 x 8" | 3.00S-21-4PR | 120/70 ZR17 | 90/90-18 |
| Rear Tyre: | 3.5 x 8" | 4.60S-18-4PR | 180/55 ZR17 | 100/90-18 |
| Dry Weight: | 98 kg / 216 lbs | 138 kg / 304.2 lbs | 186 kg / 410.05 lb | 152 kg / 335 lbs |
| Fuel Capacity: | 6.25 L / 1.65 US gal | 14 Litres / 3.6 US gal | 18.5 Litres / 4.8 gal | 16.5 Litres / 4.3 US gal |
| Consumption average: | 2.4 L/100 km / 42 km/l / 98 US mpg | 47.3 mpg | 17.1 km/lit | 18.9 km/lit |
| Top Speed: | 75 km/h / 47mph (speed reduced by sidecar) | 162.2 km/h / 100.8 mph | 236.3 km/h | 158.3 km/h |