The ST185 All-Trac Turbo / GT-Four was a pretty sweet version of a mediocre hairdresser's car. Toyota fitted it with a viscous center diff to send power from the transversely mounted 3S-GTE engine & transaxle back to a retrofitted rear differential, potentially a limited scrimp. If you want to go sideways very rapidly in dirt, or just demolish all of the FWD & RWD competition in the stoplight drags, this is your steed. Think of it as a 25 year old take on the STi / Evo formula, except in a liftback coupe body. Or a scaled-up Mazda 323 GTX, except it's actually a good car.
On the other hand, the 3S-GTE engine is not really that impressive vs. modern turbocharged four cylinders, from a specific output perspective. It made 200hp from 2.0L which is 100hp/L, nothing to sneeze at, but since bettered by several naturally aspirated production engines and far eclipsed by today's hyper boosted turbo mills (the Mercedes-Benz M133 DE 20 AL as found in the current CLA45 AMG makes 355hp from 2.0L for a stupendous power density of 177.5 hp/L). But for the early 90s, this was a baby supercar engine. It's the same 'plant found in the contemporary SW20 MR2 Turbo, and responds well to performance modifications. This one's "built" and running AEM standalone engine management for a claimed 215hp at all four wheels. Conservatively, that's over 250 bhp at the flywheel, so a healthy 25% bump up from the stock power level.