Peak power means stuff all in a street car,
For example, how many dyno queens have actually run a quick time down the strip?
I can think of 2, Eddie Tassone's VH commodore (Twin turbo 383ci V8) and the Trick and Mansweto Capri (604ci NA V8)
but these were both built as drag cars from the outset.
yet a heap of other cars have made big power but are useless at anything other than being strapped to some rollers.