AJS Model 31 650 Swift vs Ariel FH 650 (1966)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the AJS Model 31 650 Swiftstacks up against the Ariel FH 650. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | AJS Model 31 650 Swift | Ariel FH 650 |
|---|---|---|
| Model year | 1966 | 1954 |
| Price | — | — |
| Engine | 646 cc | 646 cc |
| Horsepower | 31 hp | 35 hp |
| Weight | 176 kg | 181 kg |
| Seat height | — | 31 mm |
| Fuel capacity | 4.2 L | 4.0 L |
| Fuel type | petrol | petrol |
| Transmission | — | 4-speed |
| Front brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Tires | — | 3.25-19 / 3.50-19 |
AJS Model 31 650 Swift vs Ariel FH 650 — which should you buy?
Picking between the AJS Model 31 650 Swift and the Ariel FH 650 usually comes down to the numbers you care about most. On paper, the AJS Model 31 650 Swift brings 31 hp in a 176 kg package, while the Ariel FH 650 counters with 35 hp at 181 kg.
Our spec tables above highlight the winning number on each line. For the full rider-focused reviews including real-world fuel economy, service costs and available colors, click into either bike: