3tc actually came out with more power than 4ac (although if you went to the trouble of 4ac you'd just go ge.
The 4A-C was a SOHC inline four (I4) 8-valve carburettor-equipped engine which produces 78-90 hp (58-67 kW) @ 4800 rpm, torque: 85 ft·lbf (115 N·m) @ 2800 rpm. The power and torque output figures vary between different regions of the world.
The 3T displaces 1770 cc and was produced from 1977 through 1985. Cylinder bore is 85 mm (3.35 in) and stroke is 78 mm (3.07 in).
The 3T OHV engines are mated to either of a T40 4 speed, T50 5 speed manual transmission, or an A40 3 speed, or A40D 4 speed automatic transmission.
Output ranges from 70-105 hp (52-78 kW) and 93-120 ft·lbf (126-162 N·m) between the California 3T-C and Japan-spec fuel injected 3T-EU.