Harley-Davidson Fat Boy vs Honda NX500

The Harley-Davidson Fat Boy (2025) and the Honda NX500 (2025) 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 Fat Boy is a cruiser with 1,923 cc, 103.3 hp and 315 kg; the Honda NX500 is a adventure bike with 471 cc, 46.9 hp and 196 kg. Power-to-weight with the rider: 264.8 hp/ton versus 173.2 hp/ton. On this measure the Harley-Davidson Fat Boy is 53% ahead.

In the simulation the Harley-Davidson Fat Boy covers 0-100 km/h (speedometer) in 3.54 s and the Honda NX500 in 5.11 s; the Harley-Davidson Fat Boy is quicker by 1.56 s. In the 100-0 km/h brake test, braking distance without the 0.3 s reaction time is 49.1 m for the Harley-Davidson Fat Boy (ABS unknown, class assumption: no ABS) and 41.4 m for the Honda NX500 (with ABS). The Honda NX500 stops 7.7 m shorter. Calculated top speed: 201 km/h (estimated from power and drag) versus 152 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 class-average calibration (no accepted model-specific road test) for both. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.