maybe if every team had different engine configurations but all had the same Torque and HP figures and had to achieve similar MPG.
imagine:
Mazda would have a 2.4L Turbo Wankel
Lexus would have a 4.2L V10 NA
Mercedes with a 6.2L V8 NA
BMW with a 3.8L I6 Turbo
McLaren with a Twin Turbo V8
Peugeot with a V10
all around…