Harley-Davidson Model J vs Ariel 4G Square Four Mark I (1953)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Harley-Davidson Model Jstacks up against the Ariel 4G Square Four Mark I. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Harley-Davidson Model J | Ariel 4G Square Four Mark I |
|---|---|---|
| Model year | 1929 | 1953 |
| Price | — | — |
| Engine | 989 cc | 995 cc |
| Horsepower | — | 35 hp |
| Weight | 181 kg | 197 kg |
| Fuel capacity | — | 4.2 L |
| Fuel type | petrol | petrol |
| Transmission | — | 4-speed |
| Front brakes | — | Expanding brake (drum brake) |
| Rear brakes | Expanding brake (drum brake) | Expanding brake (drum brake) |
| Tires | 3-26 / 3-26 | 3.25-19 / 4.00-18 |
Harley-Davidson Model J vs Ariel 4G Square Four Mark I — which should you buy?
Picking between the Harley-Davidson Model J and the Ariel 4G Square Four Mark I usually comes down to the numbers you care about most. On paper, the Harley-Davidson Model J brings its published horsepower in a 181 kg package, while the Ariel 4G Square Four Mark I counters with 35 hp at 197 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: