MIURA P40OS

 

The P400S was first seen at the Turin motor show in 1968. “Low profile” 70 section Pirelli Cinturato radials were used. A 20 horsepower increase was announced. Ventilated disc brakes were available on later S Miuras. Rear suspension was revised. The frames around the windscreen, windows and headlamp were now chromed. An “S” logo was at the rear of the car.

  

MIURA P400S SPECIFICATIONS 

        

DETAILS

 Later type steering wheel with later grab handle

 

Later type door skin

 

Optional AC

 

Later type Bertone badge

Roof mounted switches

 

Rear lights and logo

 

 

 

3rd  type spinner

Eye lashes and chrome trim around the head lights

Chrome trim around the windshield

 

 

  

 

ENGINE

Type/location 

12 V (60 degrees) / rear transversaly mounted

Material 

light alloy (block and heads)

Bore x stroke 

82 x 62 mm

Displacement 

3929 cm3

Bore & stroke 

82 x 62 mm

Compression ratio 

10.5:1

Max. power 

370 hp DIN at 7700 rpm (claimed)                330 hp DIN (real)

Specific  power 

94.1 hp DIN / litre

Max. torque 

39,5 mkg at 5500 rpm

Valve gear 

2 overhead camshafts per cylinder bank chain driven

Valves 

2 per cylinder in V of 70 degrees. 48 mm dia. (inlet) 38 mm dia. (exhaust)

Crankshaft 

no of main bearings 7

Cooling system 

water type cross-flow front radiator with 2 electric fans

Lubrification 

pressure fed, wet sump common with transmission and differential

Fuel system 

4 downdraught triple choke Weber 40 IDL 3L with 1 electric Bendix fuel pump (100 octane)

Ignition 

Bosch 235P21 plugs with 2 Bosch coils and 2 Marelli S 85 C distributors, 12 V

Firing order 

1-7-4-10-2-8-6-12-3-9-5-11

Alternator 

770 Watt

 

TRANSMISSION

Clutch 

Single dry-plate, 245 mm dia, hydraulic operation

Gearbox 

rear driven, all synchromesh Porsche patent, 5 speed + reverse manual

 

1st : 2.520:1

 

2nd : 1.735:1

 

3rd : 1.225:1

 

4th : 1.000:1

 

5th : 0.815:1

 

Reverse : 2.765:1

Differential

ZF-type, final drive ratio : 4.09:1 (11/45)

 

CHASSIS

Construction 

Semi-monocoque welded steel box center section with tubular extensions

Body 

Bertone berlinetta semi-monocoque steel construction with aluminium front and rear sections

Suspension 

independent, upper and lower traopezoidal A-arms, helicoidal coil springs, telescopic hydraulic shock absorbers, anti roll torsion bars

Brakes 

Girling vented disc brakes on 4 wheels, hydraulic dual circuit, 300 mm front disc and 306 mm rear disc, mechanical handbrake on rear wheels

Steering

Rack and pinion unassisted, 11,2 m turning circle, 3.5 turns at steering wheel, 14 in steering dia.

Wheels

Campagnolo cast magnesium alloy, 7 in x 15 in

Tyres 

Pirelli Cinturato HS 205-VR-15

 

DIMENSIONS / CAPACITIES

Length

4390 mm 

Width

1780 mm 

Height

1100 mm

Wheelbase

2504 mm 

Front track

1412 mm 

Rear track

1412 mm 

Front overhang

985 mm 

Rear overhang

900 mm 

Ground clearance

125 mm

Dry weight

1125 kg (early S) to 1250 kg (later S)

Maximum weight

1375 kg

Fuel tank

90 l 

Oil 

11,5 l 

Cooling system 

18 l 

Trunk capacity

140 l

 

 

PERFORMANCE

Maximum speed 

285 Km/h 

0 - 100 Km/h 

6.0 sec    

Standing Km

24.4 sec      

 

MIURA P400S PRODUCTION NUMBERS

1966

1967

1968

1969

1970

1971

1972

1973

TOTAL

 

 

32

142

140

24

 

 

338

 

MIURA P400S CHASSIS NUMBERS REBUILT DURING PRODUCTION YEARS 

3006 (no 20 and 531) P400 rebuilt to P400S (1970)

3312 (no 126 and 479) P400 rebuilt to P400S (1970)

3408 (no 157, 480 and 611) P400 rebuilt to P400S (1970)  and to P400SV (1971)

3676 (no 243 and 526) P400 rebuilt to P400S (1970)

3766 (no 273 and 474) P400 rebuilt to P400S (1970)

3829 (no 296 and 434) P400S rebuilt to P400S (1969)

3850 (no 308 and 514) P400 rebuilt to P400S (1970)

4042 (no 362 and 554) P400S rebuilt to P400S (1970)

4527 (no 504 and 698) P400S rebuilt to P400SV (1972)

 
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