The Iso Daytona or Iso Nembo was designed by Giotto Bizzarrini and Renzo Rivolta as a racing car that could also be adapted for street use. It used an American V8 engine in a front-engine, rear-wheel-drive layout, a lightweight aluminum body, independent front suspension and rear de Dion axle. After Bizzarrini left Iso in 1965, Neri and Bonacini were contracted to complete the unfinished design and build prototype bodies. The prototype was displayed to the public at the 1966 Italian Grand Prix at Monza. As many as 5 Iso Daytonas were built and details around their production history and specifications are unclear. One car of this type was showcased in the August 1966 issue of Road and Track, under the name "Nembo II." The magazine represented this car as derived from Bizzarrini's Iso Grifo and 5300 GT designs but does not mention any official connection with Iso.