Top performances and open top driving fun were again combined in the Biturbo Spyder which was the first open Maserati since the Ghibli Spyder, more than twelve years earlier. Development for the body was done by Zagato near Milan while the bodies were assembled in Turin before transportation to Modena where the mechanical parts were added. The 2,514mm wheelbase from the Biturbo was reduced to 2,400mm for the Spyder models. The Biturbo Spyder existed in various versions and followed the same technical and aesthetical evolutions as the coupé, with the exception of the 24-valve 2.8L engine that was never installed in the open models. The engines were the same 2.0L unit for the home market and 2.5L for export as already found on the Biturbo. The folding roof came with Alcantara headlining. The Biturbo Spyder was launched following the true Maserati heritage, with leather interior and golden Maserati watch on the dashboard.
| Data sheet | Spyder | Spyder i | Spyder i (1990) |
|---|---|---|---|
| Model code | Tipo AM333 | Tipo AM333 | Tipo AM333 |
| Body type | 2+2 spyder | 2+2 spyder | 2+2 spyder |
| Design | Zagato | Zagato | Zagato |
| Production years | 1984 - 1986 | 1986 - 1988 | 1989 - 1992 |
| Maserati era | De Tomaso | De Tomaso | De Tomaso |
| Numbers produced | 276 | 297 | 122 |
| Chassis | Monocoque steel construction | Monocoque steel construction | Monocoque steel construction |
| Dry weight | 1,251kg | 1,251kg | 1,308kg |
| Engine configuration 90° V6 | 90° V6, three valves per cylinder (two intake, one exhaust), single overhead camshaft, twin-turbo | 90° V6, three valves per cylinder (two intake, one exhaust), single overhead camshaft, twin-turbo | 90° V6, three valves per cylinder (two intake, one exhaust), single overhead camshaft, twin-turbo |
| Displacement | 1,996cc | 1,996cc | 1,996cc |
| Maximum power | 180hp @ 6,000rpm | 185hp @ 6,000rpm | 220hp @ 6,250rpm |
| Top speed | 215km/h | 220km/h | 230km/h |
