Horex Imperator 400 (1955-60) vs Aprilia RSV-4 APRC Factory ABS (2012)
Comparison technical specifications
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| Make: | Horex | Aprilia |
| Model: | Imperator 400 | RSV-4 APRC Factory ABS |
| Years: | 1955-60 | 2012 |
| Engine: | Four stroke, parallel twin cylinder. | Four stroke, longitudinal 65° V four , DOHC, 4 valves per cylinder |
| Capacity: | 400 cc / 24.4 cu-in | 999.6 cc / 61.0 cu-in |
| Bore x Stroke: | 61,5 x 66 mm | 78 x 52.3 mm |
| Cooling System: | Air cooled | Liquid cooled |
| Compression Ratio: | 7.25:1 | 13.0:1 |
| Induction: | Carburetor | Airbox with front dynamic air intakes. Variable length intake ducts controlled via ECU. 4 Weber-Marelli 48-mm throttle bodies with 8 injectors and latest generation Ride-by-Wire engine management. Choice of three different engine maps selectable by the rider with bike in motion: T (Track), S (Sport), R (Road) Magneti Marelli digital electronic ignition system integrated in engine control system, with one spark plug per cylinder and "stick-coil"-type coils |
| Starting: | Kick | Electric |
| Max Power: | 18.9 kW / 26 hp @ 6790 rpm | 132 kW / 180 hp @ 12500 rpm |
| Transmission: | 4 Speed | 6 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Earles forks | Öhlins Racing upside-down fork, 43-mm stanchions (with Tin surface treatment). Low profile forged aluminium radial |
| Rear Suspension: | Dual shocks | Twin sided aluminium swingarm; mixed low thickness and sheet casting technology. Öhlins Racing monoshock with piggyback with completely adjustable: spring preload, wheelbase and hydraulic compression and rebound damping. APS progressive linkages. |
| Front Brakes: | 190mm Drum | 2 x Ø320 mm diameter floating stainless steel disc with lightweight stainless steel rotor and aluminium flange with 6 pins. Brembo monobloc radial calipers with 4 x Ø34 mm opposite. Sintered pads. Radial pump and metal braided brake hose |
| Rear Brakes: | 190mm Drum | Single Ø220 mm diameter disc, Brembo floating caliper with two Ø32 mm isolated pistons. Pump with integrated tank and metal braided hose |
| Front Tyre: | 3.25 -18 | 120/70 ZR17 |
| Rear Tyre: | 3.50 -18 | 200/55 ZR 17 (alternative: 190/50 ZR 17; 190/55 ZR17) |
| Fuel Capacity: | 17 Litres / 4.5 US gal | 17 Liters / 4.4 US gal |