1989 Pontiac Grand Prix (Worst)
The 1989 Pontiac Grand Prix introduced a completely new design to the storied model line. The Grand Prix for 1989 was the first car in the model’s history to forego a V8 power plant. Instead, GM focused the product line on a few V8 engine offerings, one of which was a turbo-powered variant. With the main competition for the two-door Grand Prix being the Ford Thunderbird, the car was greatly underpowered. The interior was a mess of switches, odd design pieces, and strange seating (via Classic Car Database).
There were some decent aspects of the Grand Prix. The seats were well bolstered for the time, and the quality of the interior materials was high. The car also had a handsome exterior considering how blocky the previous Pontiac models were. But the shortcomings make the 1989 model one of the worst that Pontiac had made. There were better options than the Grand Prix in the same model year.