Yamaha TDR 250 (1990-91) vs Yamaha WR 450F (2003-04) vs Aprilia Tuono V4 R APRC (2015)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Aprilia |
| Model: | TDR 250 | WR 450F | Tuono V4 R APRC |
| Years: | 1990-91 | 2003-04 | 2015 |
| Engine: | Two stroke, parallel twin cylinder, read valve, YPVS | Four stroke, single cylinder, DOHC, 5 titanium valve per cylinder. | Four stroke, longitudinal 65° V four , DOHC, 4 valves per cylinder |
| Capacity: | 249 cc / 15.2 cu-in | 449 cc / 27.4 in | 998,9 cc / 60.9 cu-in |
| Bore x Stroke: | 56.4 х 50 mm | 95 x 63.4 mm | 78 x 52.3 mm |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 5.9:1 | 12.5:1 | 13.0:1 |
| Lubrication: | Autolube | Wet Sump | Wet sump lubrication system with oil radiator and two oil pumps (lubrication and cooling) |
| Induction: | 2x 28mm TM28SS Mikuni carburetors | 39mm Keihin FCR flat-slide throttle position sensor | Airbox with front dynamic air intakes; 4 Weber-Marelli Ø48-mm throttle bodies with 4 injectors and latest generation Ride-by-Wire engine management. |
| Ignition: | Transistorized | Digital CDI | 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 / Kick-starter | Electric |
| Max Power: | 46 hp / 37 kW @ 10000 rpm | 58 hp / 42.3 kW @ 9000 rpm | 126.8 kW / 170 hp @ 11500 rpm |
| Max Torque: | 3.7 kgf-m / 26.7 lb-ft @ 8500 rpm | 49 Nm / 33.1 lb-ft @ 7000 rpm | 111.5 Nm / 11.4 kgf-m 82.2 lb/ft @ 9500 rpm |
| Transmission: | 6 Speed | 5 Speed | 6 Speed |
| Final Drive: | Chain | "O" ring Chain | Chain, drive ratio: 42:16 (2,625) |
| Front Suspension: | Air assisted telescopic forks 7-way adjustable preload | 46mm Kayaba inverted telescopic fork, compression and rebound damping adjustable | Sachs upside-down one by one fork, stanchions 43 mm. Forged aluminum feet for radial calliper mounting; Completely adjustable spring preload and hydraulic compression and rebound damping; |
| Rear Suspension: | Single shock rising rate adjustable preload | Fully adjustable Kayaba single shock, 315mm wheel travel, separate speed compression adjustment | Double braced aluminum swingarm; mixed low thickness and sheet casting technology; Sachs piggy back monoshock with completely adjustable: spring preload and hydraulic compression and rebound damping. APS progressive linkage; |
| Front Brakes: | Single 320mm disc 2 piston calipers | Single 250mm disc 4 piston caliper | 2 x Ø320 mm floating stainless steel discs with lightweight stainless steel rotor with 6 studs. Brembo monobloc radial callipers M432 with 4 horizontally opposed Ø32 mm pistons. Sintered pads. Axial pump master cylinder and metal braided brake hoses. |
| Rear Brakes: | Single 210mm disc single piston caliper | Single 245mm disc 2-piston caliper | Single Ø220 mm diameter disc, Brembo floating calliper with two Ø32 mm isolated pistons. Sintered pads. Pump with integrated tank and metal braided hose. |
| Front Tyre: | 110/90-18 | 80/100-21 | 120/70 ZR17 |
| Rear Tyre: | 120/80-17 | 110/100-18 | 190/55 ZR 17 (alternative: 190/50 ZR 17; 200/55 ZR 17) |
| Dimensions: | Length 2145 mm / 84.4 in Width 785 mm / 30.9 in Height 1215 mm / 47.8 in | Length 2175 mm / 85.6 in Width 825 mm / 32.5 in Height 1300 mm / 51.2 in | Length: 2065 mm / 81.2 in Width: 800 mm / 31.4 in (at the handlebar) Height : 1090 mm / 42.9 in |
| Wheelbase: | 1385 mm / 54.5 in | 1485 mm / 58.5 in | 1435 mm / 56.8 in |
| Seat Height: | 820 mm / 32.2 in | 998 mm / 39.3 in | 833 mm / 32.8 in |
| Ground Clearance: | 230 mm / 9.0 in | 365 mm / 14.3 in | 125 mm / 4.9 in |
| Dry Weight: | 137 kg / 302 lbs | 112.5 kg / 248 lbs | 183 kg / 403.4 lbs |
| Fuel Capacity: | 14 Litres / 3.6 US gal | 8 Liters / 2.1 US gal | 18 Liters / 4.8 US gal |