Ariel 4F Square Four 500 vs Enfield Thunderbird 500 (2019)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Ariel 4F Square Four 500stacks up against the Enfield Thunderbird 500. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Ariel 4F Square Four 500 | Enfield Thunderbird 500 |
|---|---|---|
| Model year | 1931 | 2019 |
| Price | — | — |
| Engine | 498 cc | 499 cc |
| Horsepower | — | 27 hp |
| Torque | — | 41 Nm |
| Weight | 193 kg | — |
| Seat height | — | 31 mm |
| Fuel capacity | 3.5 L | 5.3 L |
| Fuel type | petrol | petrol |
| Transmission | 4-speed | 5-speed |
| Front brakes | Expanding brake (drum brake) | Single disc. 2-piston calipers |
| Rear brakes | Expanding brake (drum brake) | Single disc. Single-piston |
| Tires | 3.25-19 / 3.25-19 | 90/90-19 / 120/80-18 |
Ariel 4F Square Four 500 vs Enfield Thunderbird 500 — which should you buy?
Picking between the Ariel 4F Square Four 500 and the Enfield Thunderbird 500 usually comes down to the numbers you care about most. On paper, the Ariel 4F Square Four 500 brings its published horsepower in a 193 kg package, while the Enfield Thunderbird 500 counters with 27 hp.
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: