The GT500 has nowhere near
The GT500 has nowhere near 114 hp/L. That's absurd. You need to take into account effective displacement from boost. Every 1 bar, or 14.5 psi means doubled displacement. At 15 psi, or 1.03 bar, this means the GT500 has an effective displacement of roughly 11.8 liters (1.03 plus 1 for its constant displacement, 2.03 x 5812cc constant displacement = 11.798 liters). This means that the GT500 has a specific output of 56 hp/L.