The 1973 Triumph T140 Bonneville from United Kingdom was powered by a 744cc OHV twin producing 49hp at 6200rpm. Weighing 185.0kg (408 lbs) and with a seat height of 790mm, it was aimed at standard riders.
The 1983 Triumph T140 TSX by contrast offered 744cc of OHV twin power, delivering 50hp at 6500rpm. Tipping the scales at 188.0kg (414 lbs) with a top speed of 170km/h (106 mph), it offered a distinct riding experience. 1970s bikes from the Japanese superbike revolution are increasingly sought after. Clean, original examples have seen significant value appreciation.
Specifications Comparison
| 1973 Triumph T140 Bonneville | 1983 Triumph T140 TSX | |
|---|---|---|
| Displacement | 744 cc | 744 cc |
| Power | 49 hp | 50 hp |
| Torque | 54.0 Nm | 54.0 Nm |
| Cylinders | 2 | 2 |
| Top Speed | 175 km/h | 170 km/h |
| Quarter Mile | — | — |
| Dry Weight | 185.0 kg | 188.0 kg |
| Wet Weight | 198.0 kg | 202.0 kg |
| Seat Height | 790 mm | 790 mm |
| Wheelbase | 1410 mm | 1410 mm |
| Fuel Capacity | 14.0 L | 14.0 L |
| Gears | 5 -speed | 5 -speed |
The Verdict
Comparing these two Triumph machines reveals the brand's evolution. The 1973 Triumph T140 Bonneville laid the groundwork with 49hp, while the later 1983 Triumph T140 TSX pushed output to 50hp. From a collector's perspective, the 1973 Triumph T140 Bonneville holds the edge with a 7/10 rating. Either way, both are worthy additions to any Triumph collection. Parts availability is good for the 1973 Triumph T140 Bonneville and moderate for the 1983 Triumph T140 TSX — an important factor for any restoration project.
About the 1973 Triumph T140 Bonneville
Born in 1973, the 1973 Triumph T140 Bonneville is a 744cc twin-cylinder standard motorcycle producing 49hp from Triumph.
Full 1973 Triumph T140 Bonneville Profile →About the 1983 Triumph T140 TSX
Introduced in 1983, the 1983 Triumph T140 TSX features a 744cc OHV twin engine producing 50hp, establishing itself as a notable standard motorcycle.
Full 1983 Triumph T140 TSX Profile →