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Biturbo Export

While the two-litre versions of the Biturbo were reserved for the Italian market, a 2.5L version destined for export was presented in 1983. The 90° V6 three-valve engine had an increased bore to expand its capacity to 2,491cc, but the cylinder liners were now from cast iron instead of aluminium and this engine did not have intercoolers for the two IHI turbochargers. The Biturbo 2500 maintained the Torsen limited slip differential from the two-litre versions (a world first on a production car). A slightly 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 codeTipo AM331Tipo AM331Tipo 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 AndreaniPierangelo AndreaniPierangelo Andreani
Production years 1983 - 1985 1984 - 1988 1987 - 1991
Maserati era De TomasoDe TomasoDe Tomaso
Numbers produced Circa 6,500 (all)Circa 6,500 (all)Circa 6,500 (all)
Chassis Monocoque steel constructionMonocoque steel constructionMonocoque steel construction
Dry weight1,161kg1,161kg1,161kg
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
Displacement2,491cc2,491cc2,491cc
Maximum power 185hp @ 5,500rpm 196hp @ 5,000rpm 188hp @ 5,500rpm
Top speed215km/h 221km/h215km/h
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