Biturbo Export

While 2.0-liter versions of the Biturbo were reserved for the Italian market, a 2.5-liter version developed for export was presented in 1983. The three-valve-per-cylinder V6 engine had an increased bore to expand its capacity to 2,491cc. Cylinder liners of cast iron replaced aluminum, and this engine did not rely on intercoolers for the two IHI turbochargers. The Biturbo 2500 maintained the Torsen limited-slip differential from the previous models (a world-first on a production car), while a more powerful version was named Biturbo ES. In 1987, the Biturbo 2500 and Biturbo ES adopted fuel injection and the name was changed to Biturbo Si 2500.

Data sheet Biturbo E Biturbo ES Biturbo Si 2500
Model code Tipo AM331 Tipo AM331 Tipo AM331
Body type 2-door, 5-seater three-box coupé 2-door, 5-seater three-box coupé 2-door, 5-seater three-box coupé
Design Pierangelo Andreani Pierangelo Andreani Pierangelo Andreani
Production years 1983 - 1985 1984 - 1988 1987 - 1991
Maserati era De Tomaso De Tomaso De Tomaso
Numbers produced Circa 6,500 (all) Circa 6,500 (all) Circa 6,500 (all)
Chassis Monocoque steel construction Monocoque steel construction Monocoque steel construction
Dry weight 1,161kg 1,161kg 1,161kg
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 2,491cc 2,491cc 2,491cc
Maximum power 185hp @ 5,500rpm 196hp @ 5,000rpm 188hp @ 5,500rpm
Top speed 215km/h 221km/h 215km/h
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