The 422 was introduced in 1988 as a replacement for all previous versions of the 420 four-door family, including the 420 Si from which its mechanicals were derived. The car was restyled with a new front grille, mirrors and five-bolt alloy wheels. In 1990, the 4.24v mirrored the two-door 2.24v, using the latest four-valve-per-cylinder, four overhead-camshaft V6 engine. Styling enhancements (including blacked-out chrome trim, specific bumpers and rocker panels along with a discreet spoiler on the trunk) conferred a sporty yet refined allure to this high-performance sedan. The independent suspension featured active electronic control on all four wheels, while the interior’s mix of leather and wood trim conveyed a feeling of exclusivity. Launched in December 1990, the 4.18v was similar to the 422, designed with smaller displacement for the Italian market. Its main feature was ABS fitted as standard, a first for the Biturbo family. Produced in only 77 units, this particular model is unquestionably one of the rarest models within the Biturbo range.
|Model code||Tipo AM332||Tipo AM332||Tipo AM332|
|Body type||4-door, 5-seater saloon||4-door, 5-seater saloon||4-door, 5-seater saloon|
|Design||Pierangelo Andreani||Pierangelo Andreani||Pierangelo Andreani|
|Production years||1988 - 1992||1990 - 1993||1990 - 1993|
|Maserati era||De Tomaso||De Tomaso||De Tomaso|
|Chassis||Monocoque steel construction||Monocoque steel construction||Monocoque steel construction|
|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, 24 valves, double overhead camshaft, twin-turbo|
|Maximum power||220hp @ 6,250rpm||220hp @ 6,350rpm||245hp @ 6,200rpm|
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