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 1966 Triumph Tiger TR6 by contrast offered 649cc of OHV twin power, delivering 40hp at 6500rpm. Tipping the scales at 175.0kg (386 lbs) with a top speed of 170km/h (106 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 | 1966 Triumph Tiger TR6 | |
|---|---|---|
| Displacement | 649 cc | 649 cc |
| Power | 46 hp | 40 hp |
| Torque | 52.0 Nm | 48.0 Nm |
| Cylinders | 2 | 2 |
| Top Speed | 177 km/h | 170 km/h |
| Quarter Mile | — | — |
| Dry Weight | 172.0 kg | 175.0 kg |
| Wet Weight | 185.0 kg | 188.0 kg |
| Seat Height | 790 mm | 790 mm |
| Wheelbase | 1400 mm | 1400 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 1966 Triumph Tiger TR6 pushed output to 40hp. 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 1966 Triumph Tiger TR6 — 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 1966 Triumph Tiger TR6
The 1966 1966 Triumph Tiger TR6 is a 649cc twin-cylinder standard motorcycle that became one of Triumph's most memorable motorcycles of the 1960s.
Full 1966 Triumph Tiger TR6 Profile →