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 1958 Norton Dominator 99 by contrast offered 597cc of OHV twin power, delivering 31hp at 6000rpm. Tipping the scales at 182.0kg (401 lbs) with a top speed of 155km/h (96 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 | 1958 Norton Dominator 99 | |
|---|---|---|
| Displacement | 490 cc | 597 cc |
| Power | 29 hp | 31 hp |
| Torque | 35.0 Nm | 40.0 Nm |
| Cylinders | 1 | 2 |
| Top Speed | 145 km/h | 155 km/h |
| Quarter Mile | — | — |
| Dry Weight | 155.0 kg | 182.0 kg |
| Wet Weight | 168.0 kg | 195.0 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 1958 Norton Dominator 99 pushed output to 31hp. 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 1958 Norton Dominator 99 — 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 1958 Norton Dominator 99
Introduced in 1958, the 1958 Norton Dominator 99 features a 597cc OHV twin engine producing 31hp, establishing itself as a notable standard motorcycle.
Full 1958 Norton Dominator 99 Profile →