The 1959 Triumph Bonneville T120 from United Kingdom was powered by a 649cc OHV twin producing 46hp at 6500rpm. Weighing 172.0kg (379 lbs) and with a seat height of 790mm, it was aimed at standard riders.
The 1965 Triumph T100SS by contrast offered 490cc of OHV twin power, delivering 34hp at 7000rpm. Tipping the scales at 160.0kg (353 lbs) with a top speed of 160km/h (99 mph), it offered a distinct riding experience. 1950s bikes represent the golden age of British motorcycling and early Japanese innovation, with well-maintained examples commanding premium prices.
Specifications Comparison
| 1959 Triumph Bonneville T120 | 1965 Triumph T100SS | |
|---|---|---|
| Displacement | 649 cc | 490 cc |
| Power | 46 hp | 34 hp |
| Torque | 52.0 Nm | 38.0 Nm |
| Cylinders | 2 | 2 |
| Top Speed | 177 km/h | 160 km/h |
| Quarter Mile | — | — |
| Dry Weight | 172.0 kg | 160.0 kg |
| Wet Weight | 185.0 kg | 173.0 kg |
| Seat Height | 790 mm | 780 mm |
| Wheelbase | 1400 mm | 1380 mm |
| Fuel Capacity | 14.0 L | 14.0 L |
| Gears | 4 -speed | 4 -speed |
The Verdict
Comparing these two Triumph machines reveals the brand's evolution. The 1959 Triumph Bonneville T120 laid the groundwork with 46hp, while the later 1965 Triumph T100SS pushed output to 34hp. From a collector's perspective, the 1959 Triumph Bonneville T120 holds the edge with a 9/10 rating. Either way, both are worthy additions to any Triumph collection. Parts availability is good for the 1959 Triumph Bonneville T120 and moderate for the 1965 Triumph T100SS — an important factor for any restoration project.
About the 1959 Triumph Bonneville T120
The 1959 1959 Triumph Bonneville T120 packs a 649cc OHV twin engine with 46hp into a standard motorcycle package from Triumph.
Full 1959 Triumph Bonneville T120 Profile →About the 1965 Triumph T100SS
The 1965 1965 Triumph T100SS packs a 490cc OHV twin engine with 34hp into a standard motorcycle package from Triumph.
Full 1965 Triumph T100SS Profile →