page_title: Maserati Biturbo
section_title: Racing
hierarchical_section_title: Maserati Biturbo / Biturbo coupé (Tipo AM331) / Racing
caption_attribution_description: Moteur Maserati Racing
context_page_description: The Maserati Biturbo was a family of executive grand tourers produced by Italian automobile manufacturer Maserati between 1981 and 1994. The original Biturbo was a two-door, four-seater notchback coupé featuring, as the name implies, a two-litre V6 engine with two turbochargers and a luxurious interior.
  The car was designed by Pierangelo Andreani, Chief of Centro Stile Maserati up to 1981, somewhat influenced by the design of the then recent Quattroporte III.
  All Maserati models introduced from the Biturbo's inception in 1981 until 1997 were based on the original Biturbo architecture, including the later grand tourers like the Shamal and Ghibli II. The Barchetta, while of a different layout entirely, used an ultimate version of the Biturbo V6 engine.
context_section_description: The Maserati Racing (Tipo 331) was a more potent variant of the 2.24v with a higher power output, and was meant as an intermediate model beneath the more aggressive Shamal. It was first introduced to the press in December 1990, only 230 units were built from 1991 to 1992 and all were meant for the Italian market only. Later, several units could be found exported across Europe (France, Sweden, Denmark, Germany and the Netherlands) which indicated import to those countries from Italy; limited documentation was available, which made homologation in some countries (still) a huge administrative challenge.
  The lowered, electronic KONI shock absorbers allowed to adjust damping on four settings, allowing for comfort or sharp handling at the flick of a switch. This is combined with a five-speed manual gearbox manufactured by Getrag and a limited slip differential from Maserati but suspected to use Quaife technology.
  The choice of colours of the Racing was limited to red or black. On the interior, the only change was the paneling, painted dark grey (carbon fibre grey) instead of the standardwood trim.
  Combined with new settings on the two engine controllers from Magneti Marelli, in charge of the ignition, the fuel injection and the turbo boost management, allowed the power to increase to 287 PS (211 kW; 283 hp) at 6,250 rpm with a specific output of 142 hp/L. The torque is 374 N⋅m (276 lb⋅ft) at 4,250 rpm. This engine was given the designation AM 490 in the Maserati engine reference book. The engine was made compatible with lead-free gasoline. Induction consists of two IHI water-cooled turbochargers with two air-to-air intercoolers. Changes from the 2.24v's engine include a new, lighter crankshaft, new exhaust valves (sodium filled for improved heat dissipation), new combustion chambers, new lighter connecting rods, new lighter forged aluminium pistons, and new IHI turbochargers.
  Performance stats
  Max. speed: 256 km/h (159 mph)
  0–100 km/h (0–62 mph): 5.9 seconds.
  0–1,000 m (0.00–0.62 mi): 25.60 seconds.
caption: Engine
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