Royal Alloy Grand Prix 300S vs Vespa GTS Super 300 Tech (2025)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Royal Alloy Grand Prix 300Sstacks up against the Vespa GTS Super 300 Tech. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Royal Alloy Grand Prix 300S | Vespa GTS Super 300 Tech |
|---|---|---|
| Model year | 2025 | 2024 |
| Price | — | — |
| Engine | 278 cc | 278 cc |
| Torque | — | 26 Nm |
| Weight | 154 kg | 158 kg |
| Seat height | — | 31 mm |
| Fuel capacity | — | 2.3 L |
| Fuel type | petrol | petrol |
| Transmission | — | Automatic |
| Front brakes | — | Single disc. ABS. Hydraulic. |
| Rear brakes | — | Single disc. ABS. Hydraulic. |
| Tires | Pirelli 110/70-12 / Pirelli 120/70-12 | 120/70-12 / 130/70-12 |
Royal Alloy Grand Prix 300S vs Vespa GTS Super 300 Tech — which should you buy?
Picking between the Royal Alloy Grand Prix 300S and the Vespa GTS Super 300 Tech usually comes down to the numbers you care about most. On paper, the Royal Alloy Grand Prix 300S brings its published horsepower in a 154 kg package, while the Vespa GTS Super 300 Tech counters with its own power figure at 158 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: