Park Avenue Essence, 1989 -- First light green and later white, this sedan was displayed at auto shows as a forerunner of one of Buick's most important cars of the era -- the 1991 Park Avenue. Essence has graceful exterior contours and instruments displayed in a wide, sweeping panel, and the Delco Navicar system navigation system similar to Lucerne's. Essence features the then-new 185-hp 3800 V-6.

Description: Light green (later white) four-door sedan was developed by GM's Advanced Design Studio No. 1. It has aerodynamic front and rear fascias, the windshield base and instrument panel are far forward, instruments are presented in a wide and sweeping display and rich leather interior. Owned by Buick Motor Division, Flint, Mich.

Key Features: Fiberglass body, GM Delco Navicar navigation system similar to Lucerne's, separate entertainment and climate controls for the driver and passengers, remote actuator opens the doors and a button on the door closes them automatically, a 5-inch color television for the rear-seat passengers is positioned in an overhead cross-car console just behind the front seats.

Dimensions:

• Wheelbase: 113.80 in.
• Overall Length: 210.10 in.
• Height: 55.70 in.
• Width: 72.50 in.

Engine/Chassis:

• Type: 3800 V-6
• HP @ rpm: 185 @ 4400