Differences Between Pre-Facelift And Facelift

First off, here are the performance specs:

Pre Face Lift Versions
The standard specifications for 5th Generation Celicas are:-

Celica Gen5 2.0GT (Manual)
ST182 - 3S-GE Engine (1990 - 1991)
Capacity / Type
2.0 litres Normally Aspirated
Power
158 bhp @ 6600 rpm
Torque
140 ftlb @ 2800 rpm
0-60
7.9 seconds
Top Speed
137 mph
Fuel Economy
28.5 mpg
Fuel Capacity
60 litres
Wheel Size
14" (205/60 Tyres)
Length
4420mm
Width
1705mm
Height
1300mm


Celica Gen5 GT4
ST185 - 3S-GTE Engine (1990 - 1991)

Capacity
2.0 litres Turbocharged
Power
201 bhp @ 6000 rpm
Torque
203 ftlb @ 3600 rpm
0-60
6.7 seconds
Top Speed
143 mph
Fuel Economy
24.4 mpg
Fuel Capacity
68 litres
Wheel Size
15" (215/50 Tyres)
Length
4430mm
Width
1745mm
Height
1300mm


Post Face Lift Versions
The standard specifications for 5th Generation Celicas are:-

Celica Gen5 2.0GT (Manual)
ST182 - 3S-GE Engine (1991 - 1993)

Capacity / Type
2.0 litres Normally Aspirated
Power
154 bhp @ 6600 rpm
Torque
140 ftlb @ 2800 rpm
0-60
8.4 seconds
Top Speed
137 mph
Fuel Economy
28.5 mpg
Fuel Capacity
60 litres
Wheel Size
15" (205/55 Tyres)
Length
4420mm
Width
1705mm
Height
1300mm


Celica Gen5 GT4
ST185 3S-GTE Engine (1991 - 1993)

Capacity
2.0 litres Turbocharged
Power
201 bhp @ 6000 rpm
Torque
203 ftlb @ 3600 rpm
0-60
7.7 seconds
Top Speed
143 mph
Fuel Economy
24.4 mpg
Fuel Capacity
68 litres
Wheel Size
15" (215/50 Tyres)
Length
4430mm
Width
1745mm
Height
1300mm


The difference in performance is due to a three way catalyc converter added on the facelift versions. This decreases power from 158bhp down to 154bhp and what used to be 0-60 in 7.9 seconds, the facelift does it in 8.4 seconds.
Only difference with the GT4 is the 0-60 time, was 6.7 seconds, facelift is 7.7 seconds.

Other differences between pre-facelift and facelift are:

In August 1991 for 1992 model year Toyota facelifted the Celica. Changes included:

Stiffer anti roll bar was added and suspension spring rates were increased;
New three-way catalytic converter;
Improved gear linkage and a shorter gearshift;
New 5S-FE, producing 100 kW (134 hp) and 196 N·m (145 lb·ft) of torque;
Front discs were now 277 mm (10.9 in) and ventilated;
The front-drive models (except for the North American GT-S, which used the same front bumper as the 4WD models) received a new style bumper;
North American GT models received standard foglights;
15 in wheels on the Z-R, GT, and SX models fitted with Dunlop 205/55VR tires;
Toyota (T) emblems on the hood and trunk;
Taillights redesign (with smoke red frame);
New round fog lights for JDM GT-Four A;
Discontinued models: 4WS S-R, Active Sports, and normal body GT-Four.
The 'A' was dropped from the 'GT-Four A' and the wide body turbo model was simply know as the GT-Four.
The Cruise Control Package, SD Package and Luxury Package became optional on the JDM models.

Prefacelift tail lights



Facelift tail lights

Also, there is a slight difference in the ignition. Im still finding out what that is but i can tell you that a distributor cap of a prefacelift will not fit onto a facelift or vise versa.

Also, i've just noticed that facelift tail lights haven't got the word 'CELICA' written on the centre part