The 1947 Norton International from United Kingdom was powered by a 490cc OHV single producing 29hp at 6000rpm. Weighing 155.0kg (342 lbs) and with a seat height of 780mm, it was aimed at racing riders.
The 1964 Norton 650SS by contrast offered 646cc of OHV twin power, delivering 49hp at 6800rpm. Tipping the scales at 175.0kg (386 lbs) with a top speed of 185km/h (115 mph), it offered a distinct riding experience. 1940s motorcycles, especially military-era models, hold strong collector interest with values reflecting their historical significance.
Specifications Comparison
| 1947 Norton International | 1964 Norton 650SS | |
|---|---|---|
| Displacement | 490 cc | 646 cc |
| Power | 29 hp | 49 hp |
| Torque | 35.0 Nm | 52.0 Nm |
| Cylinders | 1 | 2 |
| Top Speed | 145 km/h | 185 km/h |
| Quarter Mile | — | — |
| Dry Weight | 155.0 kg | 175.0 kg |
| Wet Weight | 168.0 kg | 188.0 kg |
| Seat Height | 780 mm | 790 mm |
| Wheelbase | 1370 mm | 1400 mm |
| Fuel Capacity | 14.0 L | 14.0 L |
| Gears | 4 -speed | 4 -speed |
The Verdict
Comparing these two Norton machines reveals the brand's evolution. The 1947 Norton International laid the groundwork with 29hp, while the later 1964 Norton 650SS pushed output to 49hp. From a collector's perspective, the 1947 Norton International holds the edge with a 8/10 rating. Either way, both are worthy additions to any Norton collection. Parts availability is difficult for the 1947 Norton International and moderate for the 1964 Norton 650SS — an important factor for any restoration project.
About the 1947 Norton International
The 1947 1947 Norton International packs a 490cc OHV single engine with 29hp into a racing machine package from Norton.
Full 1947 Norton International Profile →About the 1964 Norton 650SS
The 1964 1964 Norton 650SS is a 646cc twin-cylinder sport bike that became one of Norton's most memorable motorcycles of the 1960s.
Full 1964 Norton 650SS Profile →