| MODEL | TRIUMPH SPEED FOUR 2002 - 2003 |
| Year | 2002 - 2003 |
| Engine Type | Four-stroke, transverse four-cylinder, DOHC, 4 valves per cylinder |
| Displacement / Capacity | 599 cc / 36.6 cu in |
| Bore X Stroke | 68 x 41.3 mm |
| Compression Ratio | 12.5:1 |
| Cooling System | Liquid cooled |
| Max Power | 71.4 kW / 98 hp @ 11750 rpm |
| Max Torque | 55 Nm / 5.6 kgf-m / 41 lb-ft @ 8000 rpm |
| Ignition | Digital inductive via electronic engine management |
| Induction | Multipoint sequential electronic fuel injection with forced air induction |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | 43 mm forks with dual rate springs and adjustable preload, compression and rebound damping |
| Rear Suspension | Monoshock with adjustable preload, compression and rebound damping |
| Front Brakes | 2 x 320 mm discs, 4 piston calipers |
| Rear Brakes | Single 220 mm disc, 1 piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2165 mm / 85.2 in |
| Overall Width | 690 mm / 27.2 in |
| Overall Height | 1110 mm / 43.7 in |
| Seat Height | 810 mm / 31.9 in |
| Wheelbase | 1395 mm / 54.9 in |
| Ground Clearance | — |
| Dry Weight | 170 kg / 375 lbs |
| Wet Weight | 202 kg / 446 lbs |
| WHEEL SPECS | |
| Front Tyre | 120/70 ZR17 |
| Rear Tyre | 180/55 ZR17 |
| FUEL SYSTEM | |
| Fuel Capacity | 18 Litres / 4.8 US gal / 4.0 Imp gal |
| Fuel Consumption | 4.8 L/100 km / 49 US mpg / 59 Imp mpg |
| Top Speed | 231.4 km/h / 144 mph |
The Speed Four was Triumph's naked version of the TT600 sports bike, a 600 cc inline-four in a stripped, street-fighter style with Speed Triple-like headlights. The engine was retuned for stronger low-down pull at the cost of some peak power, while the chassis, suspension and brakes came from the TT600. It was priced well below the faired bike and has sporty, compact ergonomics.
