Triumph Thunderbolt Sport (1999-04) vs Triumph Bonneville Speedmaster (2021)
Comparison technical specifications
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| Make: | Triumph | Triumph |
| Model: | Thunderbolt Sport | Bonneville Speedmaster |
| Years: | 1999-04 | 2021 |
| Engine: | Four stroke, transverse three cylinder, DOHC, 4 valves per cylinder. | Four stoke, parallel twin, 270° crank angle, SOHC, 4 valve per cylinder |
| Capacity: | 885 cc / 54 cu in | 1198 cc / 73.1 cu in |
| Bore x Stroke: | 76 x 65 mm | 97.6 x 80 mm |
| Compression Ratio: | 10:1 | 10.0:1 |
| Induction: | 3 x 36 mm flat slide CV carburetors | Multipoint sequential electronic fuel injection |
| Ignition: | Digital, inductive type | Digital |
| Starting: | Electric | Electric |
| Max Power: | 61 kW / 82 hp @ 8500 rpm (rear type 56.2 kW / 75.3 hp @ 7800 rpm) | 57.5 kW / 76.9 hp @ 6100 rpm |
| Max Torque: | 76 Nm / 7.7 kgf-m / 56 lb-ft @ 6500 rpm | 106 Nm / 78.2 lb-ft @ 4000 rpm |
| Clutch: | Wet, multi-plate | Wet, multi-plate, torque assist clutch |
| Transmission: | 6 Speed | 6-Speed |
| Final Drive: | Chain, X-ring | Chain |
| Frame: | High tensile steel spine | Tubular steel, twin cradle frame |
| Front Suspension: | 43 mm Forks with triple rate springs adjustable for compression, rebound damping and spring preload. | 47 mm Showa cartridge forks |
| Rear Suspension: | Monoshock adjustable for compression, rebound damping and spring preload. | Mono-shock RSU with linkage and preload adjustment |
| Front Brakes: | 2 x 320 mm discs, 2 piston calipers | 2 x 310mm disc, Brembo 2-piston sliding axial calipers |
| Rear Brakes: | Single 285 mm disc, 2 piston caliper | Single 255mm disc, Nissin single piston sliding axial caliper |
| Front Wheel: | 3.50 x 18", 36 spoke | Wire 32-spoke, 16 x 2.5 in |
| Rear Wheel: | 4.25 x 17", 40 spoke | Wire 32-spoke, 16 x 3.5 in |
| Front Tyre: | 120/70 R17 | 130/90-16 |
| Rear Tyre: | 160/70 R17 | 150/80-16 |
| Rake: | 27o | 25.3° |
| Trail: | 106 mm / 4.2 in | 91.4 mm / 3.6 in |
| Dimensions: | Length: 2250 mm / 88.6 in Width: 860 mm / 33.8 in Height: 1105 mm / 43.5 in | Length: 2225 mm / 87.6 in Width: 910 mm / 35.8 in Height: 1055 mm /41.5 in |
| Wheelbase: | 1580 mm / 62.2 in | 1500 mm / 59.1 in |
| Seat Height: | 790 mm / 31.1 in | 705 mm / 27.8 in |
| Wet Weight: | 238 kg / 525 lbs | 263 kg / 580 lbs |
| Fuel Capacity: | 15 Litres / 4.0 US gal / 3.3 Imp gal | 12 Litres / 3.2 US gal |