222 - 2.24v

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 222 2.24v 2.24v II (cat.)
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 Marcello Gandini Marcello Gandini Marcello Gandini
Production years 1988 - 1990 1988 - 1992 1991 - 1993
Maserati era De Tomaso De Tomaso De Tomaso
Numbers produced 1,156 1,147 254
Chassis Monocoque steel construction Monocoque steel construction Monocoque steel construction
Dry weight 1,172kg 1,240kg 1,323kg
Engine configuration 90° V6, three valves per cylinder (two intake, one exhaust), single overhead camshaft, twin-turbo 90° V6, 24 valves, double overhead camshaft, twin-turbo 90° V6, 24 valves, double overhead camshaft, twin-turbo
Displacement 1,996cc 1,996cc 1,996cc
Maximum power 220hp @ 6,250rpm 245hp @ 6,200rpm 240hp @ 6,000rpm
Top speed 225km/h 230km/h 230km
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