FD RX7's are sooo sexy.
It's nice that people are talking about power to weight. But there is also contact patch to weight, inertia, transient response, swept braking area per tonne, etc...
Also someone mentioned the thing about starting with a low weight car vs a heavy car of the same power to weight, a 10 hp gain is better in the light car.
Light > Heavy.
(unless they're rotary powered... rotaries are the devil.
)