Biturbo II (second series) - 1985-1987
The second series Biturbo was referred to as Biturbo II on the official Maserati documentation. Introduced in July 1985, it maintained the same exact characteristics as the first series, save for the adoption of Nigusil cylinder liners, a larger fuel tank, and a Sensitork differential in place of the Salisbury-type previously mounted.
Nigusil was a galvanised aluminium derivate brevetted by Moto Guzzi, which permitted the use of aluminium for both pistons and liners, thus allowing for a parallel dilatation of the two elements at all temperatures. This produced a great reduction in tolerance figures and engine temperature, improving smoothness, noise levels and oil consumption.
Externally, the new series could be identified by the new 6" J x 14" alloy wheels shod with Michelin MXV 195/60 VR 14 tyres. The total of 9206 units produced refers to the 1st and 2nd series combined.
Technical data
| 0-60 mph | 0 to 100 km/h in 6.5 sec. |
| Bodywork | three-box two-door coupé seating five |
| Bore and stroke | 82x63 mm |
| Brakes | discs all round, dual circuit, servo-assisted, additional drums on rear wheels for handbrake |
| Brakes front | |
| Brakes rear | |
| Chassis | monocoque steel construction |
| Compression ratio | 7.8:1 |
| Cooling system | water-cooled, centrifugal pump |
| Displacements (unitary) | |
| Dry weight | 2,394 lbs (1,086 kg) |
| Engine | 90° V6 |
| Engine weight | |
| First race | |
| Front Tyres | |
| Front suspension | MacPherson struts, dual-rate telescopic dampers, coil springs, anti-roll bar |
| Front track | 55.91 in. (1420 mm) |
| Fuel & lubricant | |
| Fuel feed | two IHI turbos, a single Weber 36 DCNVH 16/100 twin-choke carburettor, MABC (Maserati Automatic Boost Control) |
| Fuel tank | 17.6 Imp. gal. (80 litres) |
| Gear ratios | |
| Height | 51.38 in. (1,305 mm) |
| Ignition | electronic |
| Kerb weight | |
| Length | 163.50 in. (4,153 mm) |
| Length-Width-Height | |
| Lubrication | full-flow filter |
| Maximum power | 180 bhp at 6000 rpm |
| Maximum torque | 25.8 kgm (187 lbs/ft) at 4,400 rpm |
| Model | Biturbo II |
| One mile | 0 to 1000m. in 29.0 sec. |
| Production dates | 1985-1987 |
| Production start | 1985 |
| Quarter mile | |
| Rear Tyres | |
| Rear suspension | semi-trailing rear arms mounted on a rear subframe, coil springs, dual-rate hydraulic telescopic dampers |
| Rear track | 56.34 in. (1431 mm) |
| Reduction | |
| Steering | rack and pinion (power assistance to order) |
| Timing gear | three valves per cylinder (two intake, one exhaust), twin overhead camshafts |
| Top speed | 133.5 mph (215 km/h) |
| Total displacement | 1,995 cc |
| Transmission | 5-speed ZF + reverse (3-speed automatic to order), rear wheel drive with Sensitork differential |
| Tyres | fr/rear 195/60 VR 14, Michelin MXV |
| Weight distribution | |
| Wheelbase | 98.97 in. (2,514 mm) |
| Wheels | alloy, 6" J x 14" |
| Width | 67.48 in. (1,714 mm) |