The Allanté was refined for 1989 by virtue of a larger 4.5 liter port fuel injection engine that provided increased power and improved performance. With 10 percent greater displacement, new low-restriction exhaust manifolds and improved flow air cleaner, the Allanté’s engine had a 17 percent increase in horsepower and a 13 percent increase in torque. Its 0-60 mph time was improved from 9.5 to 8.3 seconds. Performance from 40 to 80 mph progressed from 12.3 to 10.3 sec. The Allanté’s top speed increased from 125 to 135 mph.
Exterior changes for 1989 began with a new light blue metallic color choice. Seven colors were available as gold metallic was deleted. Central door unlocking was now available from the trunk. Several improvements took place in the Allanté’s soft top. The lower well and relocated roller guides prevented fabric wear, a self-folding fabric eliminated the need for tucking and walking around the vehicle, the use of dual springs reduced lifting effort and a major reduction in body squeaks and rattles was achieved.
A total of three interior colors, including a new charcoal color, compatible with all exterior colors were offered. Both driver and passenger express-down windows were standard. Cadillac’s VATS was also standard. A new seat design was used with a softer foam on cushion and back wings, along with softer wrinkled leather trim and French seams for the wings and head restraints. A softer trim was also used for the instrument panel, doors, armrests and upper door trim. An engine oil life indicator was now standard. The 1989 Allanté also had reversible and washable carpeted floor mats with retention features. Significant technical developments were also part of the 1989 Allanté package. A new speed-dependent suspension provided for a variety of ride/handling characteristics. At low speed the emphasis was on a greater sense of isolation and smooth road feel. At normal cruising speeds the suspension provided what Cadillac regarded as “traditional Allanté ride qualities.” For higher speeds the focus was upon stability without a significant loss of ride quality. This system also monitored braking and acceleration to reduce the rate of fore/aft movement. A new variable-assist steering system reduced pump output flow as engine speed increased. It also reduced parking and low speed effort while increasing steering effort and precision at higher speeds. In order to improve ride softness and road isolation the bushings and cradle mounts were retuned. New 16 in. x 7 in. wheels and Goodyear P225/55VR16 tires were standard.
The 1989 Cadillac had a 17-symbol vehicle identification number (VIN) stamped on a metal tag attached to the upper left surface of the cowl visible through the windshield. The code was as follows:
represented the manufacturing country (United States)
represented General Motors
the Allanté car line
Allanté series identification
Digits six and seven
Allanté body style
273 cu. in. V-8. engine
a check digit
represents the model year, 1989
represents the assembly plant
the production sequence: 100000 and up
90-degree, overhead valve, V-8, aluminum block and cast iron cylinder liners, cast iron cylinder heads