I basically have both the above mentioned cars. My summer car is a 86 GT (2.8) with a 4 speed. Winter car is a '91 Cavalier (3.1) with an auto. Both cars are rated at 140 hp. With my wife at the wheel of the Cav, I hole shot her by 2 or 3 car lengths through 2nd gear. From there on in, I am not pulling away from her by much.
The way I look at it, the Fiero has the advantage of rear wheel drive, mid engine and obviously the 4 speed transmission...
------------------
Silver 86 GT
no truck, no trailer, no spray!