Only fair to compare a turbo petrol 200bhp car and 200bhp turbo diesel car.
Seeing as no-one makes a car with both engine choices there is no way you can compare.
Yep closes i can find is the cars below with the same hp used in the same cars.
1.4 VW Golf GT 1.4 turbo supercharged engine 167hp and there a 170hp TDI GOlf
1.6 16V 100hp Renault (as stuck in the Megan and the Clio etc) and the 100dci they have similar cc as well.