The MR2 is faster stock. It takes to minor modding just as well as the Supra as well.
For some specs...
'92 Supra Turbo - 3535lbs, 232hp, 254 torque. That's 15.2 lbs / hp and 13.9 lbs / torque.
'92 MR2 Turbo - 2908lbs, 200hp, 142 torque. That's 14.5 lbs / hp and 20.5 lbs / torque...