The Sbarro Opel GT Greder was a car built in 1968 by Franco Sbarro.

Frank Sbarro had collaborated with General Motors in preparation the 24 hours of Le Mans. Through Scuderia Filipinetti he had been able to meet Henri Greder. For 1969, Greder wanted to prepare the Opel GT for use in rallies with his team, the Greder Racing Team. The Opel GT, officially presented at the Frankfurt Motor Show in 1968, was a very nice car, sometimes regarded as a mini Corvette, but it was not a sports car.

Sbarro received two Opel GTs which he stripped completely. To stiffen the car, Sbarro built a specific tubular chassis. The steel body was replaced by a fibreglass body, being much lighter. The retractable headlights of the original model were replaced by two double optical fixed lights which were much more reliable. The front air intake was slightly reduced. From a technical point of view, the tracks were widened and the front axle was built to measure. The wheels were derived from those of a Formula 2 Brabham and were made from magnesium. The car reached 800 kg (an Alpine A110 weighed only 715 kg).