Harley-Davidson Sportster S vs Kawasaki Vulcan S

The Harley-Davidson Sportster S (2025) and the Kawasaki Vulcan S (2026) are compared with the same Moto Kıyas physics model under identical conditions: flat dry asphalt, no wind, a 75 kg rider and no passenger. The Harley-Davidson Sportster S is a cruiser with 1,252 cc, 120.7 hp and 228 kg; the Kawasaki Vulcan S is a cruiser with 649 cc, 59.9 hp and unlisted weight. Power-to-weight with the rider: 398.3 hp/ton versus 226.5 hp/ton. On this measure the Harley-Davidson Sportster S is 76% ahead.

In the simulation the Harley-Davidson Sportster S covers 0-100 km/h (speedometer) in 2.97 s and the Kawasaki Vulcan S in 4.49 s; the Harley-Davidson Sportster S is quicker by 1.52 s. In the 100-0 km/h brake test, braking distance without the 0.3 s reaction time is 44.7 m for the Harley-Davidson Sportster S (with ABS) and 44.7 m for the Kawasaki Vulcan S (with ABS). Calculated top speed: 194 km/h (manufacturer claim) versus 173 km/h (estimated from power and drag).

All values are an estimated simulation, not road-test measurements. Technical data comes from the sources listed below; the model uses model-specific parameters calibrated against published road tests for both. Missing manufacturer data (weight) is estimated by class regression, not measured. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.