To be honest, regardless of what it is, Scooby, Evo, Cossie, whatever, it will need to be packing more than 250bhp per ton (my lightened Clio =950kg max, power =240bhp) to do me in any acceleration test apart from 0-60, where I will have a natural FWD disadvantage. Once rolling my car is lighter and has less transmission loss, so it cant be beat.
A few quick sums for you...ok there are a few silly powered Evos and Scoobs out there, but lets be honest, there arent many 300+ Scoobs or Evos really, and most of them are what, 1250-1300kg absolute minimum? So to be generous, 300bhp / 1.25 tonnes = 240 bhp/ton. Ooops bye bye Scooby/Evo...I dont think you could even say top speed would be an issue either. OK with more outright power, say 300 brake, you could achieve a higher top speed theoretically, but in practice these Japanese rally machines are short geared sprinters, and they top out around 150 mph AFAIK. So again, not a real problem on top speed either.
Much more likely to encounter a tuned up Cossie, but then theres the weight advantage again unless its seriously stripped out. That transmission is always going to be heavy.