Talk about puggy sportscar!
I had a 90 300TT it weighed ~3450 LBs. Anyways the chasis has to be rigid enough to handle the power and outside of carbon fiber-they get heavy. Also, hightech accessories, i.e. Hicas, turbochargers and all pluming etc.. add on weight quickly. However, RX7s weigh around 2800 LBs and in stock form 255 HP are very potent to get. But rotaries require TLC i.e. oil changes every 1500 miles because they naturally burn oil.