Biturbo S (2500) - 1984 to 1988
Introduced in 1984, the export version of the Biturbo S was fitted with the upgraded 2.5-litre unit instead of the 2.0-litre engine available only in Italy. It was sometimes referred to as Biturbo ES, where the "E" simply meant "Export".
Other than the modifications linked to the engine upgrade, the Biturbo ES was similar to the Biturbo S, with two-tone paint and blacked-out chrome trim. The power output was 196 hp, 16 hp more than the Biturbo but 9 hp less than the Italian 2-litre Biturbo S, because of the catalyser fitted to match American regulations.
Technical data
| 0-60 mph | |
| Bodywork | three-box two-door coupé seating five |
| Bore and stroke | 91.6x63 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 | |
| Cooling system | water-cooled, centrifugal pump |
| Displacements (unitary) | |
| Dry weight | 2,560 lbs (1,161 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 with twin intercoolers, a single Weber 36 DCNVH 16/100 twin-choke carburettor, MABC (Maserati Automatic Boost Control) |
| Fuel tank | 20.0 Imp. gal. (91 litres) |
| Gear ratios | |
| Height | 51.38 in. (1,305 mm) |
| Ignition | electronic |
| Kerb weight | |
| Length | 166.53 in. (4213 mm) |
| Length-Width-Height | |
| Lubrication | full-flow filter lubrication |
| Maximum power | 196 bhp at 5000 rpm |
| Maximum torque | 30.8 kgm (223 lbs/ft) at 3,000 rpm |
| Model | Biturbo S (2500) |
| One mile | |
| Production dates | 1984 to 1988 |
| Production start | 1984 |
| 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 | mechanical rack and pinion (power assistance to order) |
| Timing gear | three valves per cylinder (two intake, one exhaust), twin overhead camshafts |
| Top speed | 137.4 mph (221 km/h) |
| Total displacement | 2,491 cc |
| Transmission | 5-speed ZF + reverse (4-speed automatic to order), Torsen limited-slip differential |
| Tyres | fr/rear 205/55 VR 14, Pirelli P7 |
| Weight distribution | |
| Wheelbase | 98.97 in. (2,514 mm) |
| Wheels | magnesium alloy, 6" 1/2 J x 14" |
| Width | 67.48 in. (1,714 mm) |