From 1989 a revised Biturbo Spyder model was introduced. These cars could be recognised by its 15-inch alloy rims (compared to 14" rims for the original model) and redesigned, rounder front and rear bumpers. The export model received the larger 2.8-litre engine, replacing the previous 2.5-litre unit. Bodies for the Spyder were still produced by Zagato near Milan. These cars are often referred to as the Spyder '90 as the Biturbo name was dropped for the model.
| Data sheet | Spyder i (1990) | Spyder i 1990 (2800) | Spyder i 1990 (2800) cat. |
|---|---|---|---|
| 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 | 1989 - 1992 | 1989 - 1994 | 1989 - 1994 |
| Maserati era | De Tomaso | De Tomaso | De Tomaso |
| Numbers produced | 122 | 823 | 823 |
| Chassis | Monocoque steel construction | Monocoque steel construction | Monocoque steel construction |
| Dry weight | 1,308kg | 1,345kg | 1,345kg |
| Engine configuration | 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 | 2,790cc | 2,790cc |
| Maximum power | 220hp @ 6,250rpm | 250hp @ 5,600rpm | 225hp @ 5,500rpm |
| Top speed | 230km/h | Over 230km/h | 220km/h |
