Harley-Davidson Fat Boy vs Honda Africa Twin

The Harley-Davidson Fat Boy (2025) and the Honda Africa Twin (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 Africa Twin is a adventure bike with 1,084 cc, 100.6 hp and 244 kg. Power-to-weight with the rider: 264.8 hp/ton versus 315.3 hp/ton. On this measure the Honda Africa Twin is 19% ahead.

In the simulation the Harley-Davidson Fat Boy covers 0-100 km/h (speedometer) in 3.54 s and the Honda Africa Twin in 3.02 s; the Honda Africa Twin is quicker by 0.53 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 Africa Twin (with ABS). The Honda Africa Twin stops 7.7 m shorter. Calculated top speed: 201 km/h (estimated from power and drag) versus 199 km/h (manufacturer claim).

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 the Harley-Davidson Fat Boy and model-specific parameters calibrated against published road tests for the Honda Africa Twin. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.