Marco Gramenzi built his Alfa Romeo 4C called “MG-AR 01 Furore” to compete in European hill climb racing. The car was powered by a turbocharged 1.7 L inline-four but swapped in 2017 to a naturally aspirated 3.0 L Zytek V8. At that time the V8 was producing 450 hp (330 kW). HillClimb Monsters reports after five years of development the race car is now powered by a 4.0 L Judd V8. This naturally aspirated motor can produce 670 hp at 10,000-11,000 rpm. Listen to the car scream at Trento-Bondone (2024,2025) and Vallecamonica (2024) in Italy.
Source: HillClimb Monsters