Triumph Rocket 3 Storm GT vs Viper Diablo (2026)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Triumph Rocket 3 Storm GTstacks up against the Viper Diablo. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Triumph Rocket 3 Storm GT | Viper Diablo |
|---|---|---|
| Model year | 2026 | 2009 |
| Price | $27,145 | — |
| Engine | 2458 cc | 2491 cc |
| Weight | 320 kg | 272 kg |
| Seat height | 750 mm | 24 mm |
| Fuel capacity | 18.0 L | — |
| Fuel type | petrol | petrol |
| Transmission | Manual, 6 speed, Shaft | 6-speed |
| Front brakes | Dual Hydraulic Disc | Single disc. 4-piston caliper |
| Rear brakes | Hydraulic Disc | Single disc. 4-piston caliper |
| Tires | Avon Cobra Chrome: 150/80 R17 V / Avon Cobra Chrome: 240/50 R16 V | 130/70-18 / 260/40-18 |
Triumph Rocket 3 Storm GT vs Viper Diablo — which should you buy?
Picking between the Triumph Rocket 3 Storm GT and the Viper Diablo usually comes down to the numbers you care about most. On paper, the Triumph Rocket 3 Storm GT brings its published horsepower in a 320 kg package, while the Viper Diablo counters with its own power figure at 272 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: