What you are looking at is a F1 Powerboat equipped with a Hartley H1 V8. Several years ago Baba Racing’s creator Massimo Roggiero was working along side John Hartley to develop one of his engines to compete in F1 Powerboat Word Championship. The engine is a four-stroke 3.0 L V8 that produced 420 horsepower at 10,500 rpm and only weighed 95 kg (209 lb). You can read more about Hartley engines here.
Source: F1 H2O