Harley-Davidson Fat Boy vs Honda GL1800 Gold Wing

The Harley-Davidson Fat Boy (2025) and the Honda GL1800 Gold Wing (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 Fat Boy is a cruiser with 1,923 cc, 103.3 hp and 315 kg; the Honda GL1800 Gold Wing is a touring bike with 1,833 cc, 124.7 hp and 393 kg. Power-to-weight with the rider: 264.8 hp/ton versus 266.5 hp/ton. On this measure the Honda GL1800 Gold Wing is 1% ahead.

In the simulation the Harley-Davidson Fat Boy covers 0-100 km/h (speedometer) in 3.54 s and the Honda GL1800 Gold Wing in 4.46 s; the Harley-Davidson Fat Boy is quicker by 0.92 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 41.0 m for the Honda GL1800 Gold Wing (with ABS). The Honda GL1800 Gold Wing stops 8.1 m shorter. Calculated top speed: 201 km/h (estimated from power and drag) versus 207 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.