Adler Junior M100 (1955) vs Vespa PK 50 N Speedmatic (1992-96) vs Aprilia Scarabeo 100 (2007) vs Cagiva Elefant 900AC CAT (1993)
Comparison technical specifications
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| Make: | Adler | Vespa | Aprilia | Cagiva |
| Model: | Junior M100 | PK 50 N Speedmatic | Scarabeo 100 | Elefant 900AC CAT |
| Years: | 1955 | 1992-96 | 2007 | 1993 |
| Engine: | 1 cylinder, 2 stroke | Two stroke, single cylinder | Horisontal, single cylinder, four stroke, OHC | Four stroke, 90° “L” twin cylinder, SOHC, desmodromic 2 valve per cylinder |
| Capacity: | 98 cc / 6 cub in. | 49.8 cc / 3.0 cub in | 96.2 cc / 5.9 cu in | 904 cc / 55.1 cu-in |
| Bore x Stroke: | 50 x 50 mm | 38.4 x 43 mm | 50 x 49 mm | 92 x 68 mm |
| Clutch: | Multi plate, wet, cable operated | Oil bath, multi plate | Automatic, centrifugal | Dry Multi-disc |
| Starting: | Electric | Kick start | Electric and kick | Electric |
| Ignition: | Magneto | Flywheel magneto | Electronic | Marelli electronic inductive discharge |
| Compression Ratio: | 1: 5.75 | 9.1:1 | 10.5:1 | 9.2:1 |
| Transmission: | 3 Speed gearbox, foot changes | 4 Speed, grip shift | Air cooled automatic variator | 6 Speed |
| Final Drive: | Chain | Direct drive | V-belt | Chain |
| Frame: | Double cradle steel frame | Pressed sheet steel with streamlined monocoque structure | Single spar with double cradle, high strength steel | Double steel tubular cradle |
| Front suspension: | Leading link | Trailing arm, coil spring, damper | Hydraulic fork | 45mm Showa upside down telescopic forks |
| Rear suspension: | Twon shock, plunger | Coil spring, damper | Hydraulic monoshock | Rising rate box, monoshock adjustable for preload |
| Fuel Capacity: | 7 L / 1.8 US gal | 6.2 L / 1.6 US gal | 8 L / 2.1 US gal | 22 Litres / 5.8 US gal |