MASERATI CLUB OF QUEENSLAND INC

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Biturbo 420i and Si

 
 

 
 

 

 
 

Following on from the development of the Weber Multi-Point fuel injection and the Magneti Marelli ignition for the Biturbo i, the same system was incorporated into a revised 420 sedan. The 'S' version of the sedan shared the same characteristics as the Biturbo Si.
   

Specifications:
 

Production Period:

 1986 - 1988
 

Designed By:

 Maserati
 

Body Built By:

 -
 

Number Built:

 1142 - i
524   - Si
 

Dry Weight:

 1086 kg
 

Top Speed:

 220 kph  (Si:  228 kph)
 

Engine Type:

 Front, six cylinders in 90º "V"
 

Bore and Stroke:

 82 x 63 mm
 

Displacement:

 1996 cc
 

Compression:

 7.8:1
 

Engine Output:

 185 bhp @ 6000 rpm  (Si: 220 bhp @ 6350 rpm)
 

Valves & Actuation:

 3 OHV per cylinder with a single overhead camshaft per bank
 

Carburettion:

 Supercharged engine with 2 IHI turbo-compressors and Weber multi-point electronic injection.  S version 2 water cooled IHI turbo-compressors, 2 intercoolers and Weber Multi-point electronic ignition
 

Ignition:

 Single electronic
 

Lubrication:

 Forced with delivery pump
 

Drive:

 Rear wheel drive
 

Final Drive:

 3.73:1 Sensitork
 

Clutch:

 Dry single disc
 

Gearbox:

 ZF 5-speeds plus reverse - automatic available
 

Frame:

 Unit construction with body
 

Suspension - Front:

 Independent wheels, McPherson type, coil springs with double-action telescopic shock absorbers
 

Suspension - Rear:

 Independent wheels, coil springs, double-action telescopic shock absorber
 

Brakes:

 Hydraulically operated power assisted four wheel discs
 

Wheelbase:

 2600 mm
 

Front & Rear Track:

 1442 mm front; 1450 mm rear
 

Wheels:

 Light alloy discs  7J x 14 front and rear
 

Tyres:

205/60VRx14 front and rear