1986 Maserati Biturbo owners manual 1987 Maserati Biturbo owners manual 1988 Maserati Biturbo owners manual 1989 Maserati Biturbo owners manual 1990 Maserati Biturbo owners manual
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The Maserati Biturbo engine was derived and heavily modified from the 2.0L Maserati Merak engine used in the Italian home market. It was an aluminum 90 degree V6 with cast iron wet cylinder liners, three valves per cylinder, with one exhaust valve and two intake valves of dissimilar sizes. The engine bore was fat (91.6mm) with a relatively short stroke of 63mm. Two IHI turbochargers sat underneath the cylinder banks and blew air through a single 2 barrel Weber carburetor housed atop the engine in a plenum chamber. Peak torque of 208lb-ft was available at a low 3000rpm, and combined with a weight of around 2700lbs, helped propel the car from 0-60mph in about 7 seconds.The Maserati Biturbo had a 5-speed manual ZF transmission, manual rack and pinion steering, and a leather interior. The front suspension was MacPherson strut, and the rear was an independent semi-trailing arm design. Large non-ventilated ATE disc brakes were at the front and rear, with 4 piston fixed calibers up front, and 14" 4-bolt wheels.A higher performance version of the Biturbo, called the E model, was offered during 1985 only. The E model had two-tone paint, firmer and shorter springs, a stiffer front anti-roll bar, revalved shocks, larger tires (205/60-14 instead of 185), and different wheels. The Maserati Biturbo E had the options of either dual air-to-air or air-to-liquid intercoolers, the latter made by Spearco and available only on cars sold on the west coat. With the dual air-to-liquid intercoolers, the engine produced 205hp@5250rpm and 260lb-ft at 3500 rpm. The Biturbo E sprinted to 60mph in about 6.3 seconds.For the 1986 model year, the 2 door coupe was temporarily dropped from the lineup and two new models arrived: the Maserati Biturbo Spyder, a convertible, and the 4-door Biturbo 425. All cars were equipped with automatic transmissions and power steering, and water-cooled IHI turbochargers replaced the previous oil-cooled units, which tended to improve the reliability of the turbochargers. A slightly smaller Weber carburetor was fitted. The Maserati Spyder had a shorter wheelbase than the earlier coupe and seats for only 2 people, but the mechanicals were much the same. The 4-door sedan had a slightly stretched wheelbase and increased height over the coupe.