Fastest F1 powerboat
- Who
- Guido Cappellini
- What
- 256.25 kilometre(s) per hour
- Where
- Italy (Lake D'Iseo,)
- When
- 29 April 2005
The highest speed ever reached in a Formula 1 powerboat is 256.25 km/h (159.22 mph) by Guido Cappellini (Italy) on Lake D'Iseo in northern Italy on 29 April 2005. His lightweight carbon fibre boat was powered by a 2.5 litre (153 cu in) Mercury engine.
(Official UIM record)