Yamaha FZR 400RR-SP (1990-91) vs Yamaha YZF-R 15 V4.0 (2024) vs Harley-Davidson Harley Davidson XLS 1000 Roadster (1979-85) vs Aprilia RSV-4 APRC / ABS (2011)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Harley-Davidson | Aprilia |
| Model: | FZR 400RR-SP | YZF-R 15 V4.0 | Harley Davidson XLS 1000 Roadster | RSV-4 APRC / ABS |
| Years: | 1990-91 | 2024 | 1979-85 | 2011 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, single cylinder, SOHC, 4 valve with variable valve actuation | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder | Four stroke, longitudinal 65° V four , DOHC, 4 valves per cylinder |
| Capacity: | 399 cc / 24.3 cu-in | 155.1 cc / 9.14 cu-in | 998 cc / 60.8 cu-in | 999.1 cc / 61.0 cu-in |
| Bore x Stroke: | 56 x 40.5 mm | 58.0 ? 58.7 mm | 81 x 96.8 mm | 78 x 52.3 mm |
| Cooling System: | Liquid cooled | Liquid cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 12.2:1 | 11.6:1 | 8.8;1 | 13.0:1 |
| Induction: | Carburetor | Fuel Injection | 38mm Keihin 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 |
| Ignition: | Analogue CDI (Capacitive Discharge Ign.) | TCI | Transistorized | Electronic digital ignition integrated in the fuel management system. |
| Max Power: | 66 hp / 48.6 kW @ 12500 rpm | 13.5 kW / 18.4 hp @ 10000 rpm | 57 hp / 41.7 kW @ 6000 rpm | 132 kW / 180 hp @ 12500 rpm |
| Max Torque: | 4.0 kgf-m @ 9500 rpm | 14.2 Nm / 10.5 lb-ft @ 7800 rpm | 55 ft-lb / 74 Nm @ 4000 rpm | 115 Nm / 11.7 kgf-m / 84.8 lb-ft @ 10000 rpm |
| Transmission: | 6 Speed | 6 Speed | 4 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain | Chain |
| Frame: | Aluminium delta box | Steel Deltabox | Single down tube cradle | Twin-spar adjustable aluminium frame, with castings and pressings. Adjustments: • headstock position and rake • engine height • swingarm pin height, Öhlins adjustable steering dumper |
| Front Suspension: | 41mm Telescopic forks | Up-sidedown Telescopic fork | Telehydraulic forks | Upside-down Sachs fork with Ø43 mm stanchions. Aluminium radial caliper mounts. Completely adjustable spring preload and hydraulic compression and rebound damping. |
| Rear Suspension: | Monoshock single shock preload adjustable. | Aluminum swingarm with monoshock | Dual shocks swinging arm fork | Double braced aluminium swingarm; mixed low thickness and sheet casting technology. Sachs piggy back monoshock with completely adjustable: spring preload, wheelbase, hydraulic compression and rebound damping. APS progressive linkage. |
| Front Brakes: | 2x 298mm discs 2 piston calipers | Single 282mm disc 2 piston caliper | 2x 254mm discs | 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: | Single 210mm disc 2 piston caliper- | Single 220mm disc 1 piston caliper | Single 292mm disc | Single Ø220 mm diameter disc, Brembo floating caliper with two Ø32 mm isolated pistons. Pump with integrated tank and metal braided hose |
| Front Tyre: | 120/60 VR17 | 100/80 -17M/C 52P | MJ 90-19 | 120/70 ZR17 |
| Rear Tyre: | 160/60 VR17 | 140/70 -R17M/C 66H | MT90-16 | 200/55 ZR 17 (alternative: 190/50 ZR 17; 190/55 ZR17) |
| Fuel Capacity: | 15 Litres / 3.9 gal | 11 Litres / 2.9 US gal | 13.5 Litres / 3.5 US gal | 17 Liters / 4.4 US gal |