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Maserati Bora 4.7 (1971 to 1978)

The Bora was Maserati's first mid-engined road car and was introduced in March 1971 at the Geneva motor show. Powered by Maserati's proven 4.7 liter 90° V8, mounted longitudinally, it was a true supercar which promised to fully maintain the company's core ethos of class, comfort and refinement. Judging by the critical acclaim it received throughout this period, and still continues to generate today, it delivered.

After the success of the Ghibli, Maserati once again turned to Giorgetto Giugiaro and his newly founded Italdesign studio to style the new model named after a brisk breeze off of the Eastern Adriatic coast. Pietro Frua also submitted a full-size mock-up, but Giugiaro's proposal proved to better encapsulate the modern era whilst concurrently fitting in harmoniously with other models in the range. The bodies were produced in Modena by Officine Padane. The 5-speed ZF gearbox was mounted in a sub-frame together with the rear suspension.
With Maserati now under Citroën ownership the Bora made use of the French manufacturer's parts bin, including the hydraulics that operated the brakes, pop-up headlamps, driver seat and the adjustable pedal block. The 310 hp output (300 hp in America due to restrictions on emissions) permitted a top speed of 260 km/h (162 mph). At the end of 1971 Giugiaro presented a seminal concept car based on the Bora: the


Maserati Bora 4.9 (1974 to 1978)

From 1974 the Maserati Bora was offered with the 4.9 liter version of the V8 engine, producing 320 hp. Top speed peaked at 273 kph (171 mph). 564 Boras rolled of the production line in eight years, nearly half of them in the 4.9 guise. Among original Bora owners was long-time Maserati customer Karim Aga Khan and movie producer Carlo Ponti, Sophia Loren's husband.

A racing version of the Bora was developed in 1973 following the French importer Thepenier's request to compete in Group Four, but at that time – and after extracting over 430 hp from the car – Maserati could not reach the production figure of 500 cars required to obtain its homologation. The oil crisis, combined with new tax restrictions passed by the Italian government, had, in effect, significantly reduced the market for such high performance cars. Production of the Bora stopped in 1978.

Maserati Bora 4.9

Maserati Bora 4.7 Technical Specifications

ModelBora 4.7
Maserati internal codetipo AM117
Production start1971
Number Produced289
IgnitionBosch coil ignition and distributor
Lubricationconcentric gear pump
TransmissionZF 5-speed + reverse synchromesh, rear wheel drive, single dry plate clutch, self-locking differential
Reduction1:3.77
Gear ratiosI=2.58; II=1.52; III=1.04; IV=0.846; V=0.74; R=2.86
Chassisself-supporting body/chassis
Front suspensiontransversal deformable four-side with coil springs, telescopic shock absorbers and stabilizer bar
Rear suspensioncoil springs, telescopic shock absorbers and stabilizer bar
Brakesdual hydraulic high pressure circuit, second mechanical system on rear disks for parking
Brakes front280 mm ventilated disks
Brakes rear280 mm ventilated disks
Steeringrack and pinion with dampers
Cooling systemwater cooled via a centrifugal pump and two electrically-driven fans
Length170 inches (4,335 mm)
Width69.6 inches (1.768 mm)
Height44.6 inches (1,134 mm)
Wheelbase102.3 inches (2,600 mm)
Front track58 inches (1,474 mm)
Rear track56.9 inches (1,447 mm)
Dry weight3,306 lbs (1,500 Kg)
Curb weight4,034 lbs (1,830 Kg)
Tires215/70 VR 15 Michelin as standard, Pirelli radial as an option
Wheels7 ½ / 15
Top speed174 mph (280 kmh)
Bodywork2-door 2-seater mid-engine coupé
Fuel tank19.5 Imperial gallons / 25 US gallons (90 liters)
Range400/500 km (320/400 miles)
0-62 mph6.7 sec (0-100 kmh).
Production dates1971-1978
Engine90° V8, mounted longitudinally amidships
Bore and stroke93.9x85 mm
Total displacement4719 cc
Displacements (unitary)588.628 cc
Compression ratio8.5:1
Maximum power310 bhp at 6,000 rpm
Maximum torque47 Kgm at 4,200 rpm (341 lbs/ft)
Timing geartwo valves per cylinder, twin overhead camshafts per cylinder bank
Fuel feedfour vertical Weber 42 DCNF/14 carburetors, Bendix electric pump
Fuel & lubricantN.O 90/100 RM
 

Maserati Bora 4.9 Technical Specifications

ModelBora 4.9
Maserati internal codeTipo AM117.49
Production start1974
Number Produced275
IgnitionBosch coil ignition and distributor
Lubricationconcentric gear pump
TransmissionZF 5-speed + reverse synchromesh, rear wheel drive, single dry plate clutch, self-locking differential
Reduction1:3.77
Gear ratiosI=2,58; II=1,52; III=1,04; IV=0,846; V=0,74; R=2,86
Chassisself-supporting body/chassis
Front suspensiontransversal deformable four-side with coil springs, telescopic shock absorbers and stabilizer bar
Rear suspensioncoil springs, telescopic shock absorbers and stabilizer bar
Brakesdual hydraulic high pressure circuit, second mechanical system on rear disks for parking
Brakes front280 mm ventilated disks
Brakes rear280 mm ventilated disks
Steeringrack and pinion with dampers
Cooling systemwater cooled via a centrifugal pump and two electrically-driven fans
Length170 inches (4,335 mm)
Width69.6 inches (1.768 mm)
Height44.6 inches (1,134 mm)
Wheelbase102.3 inches (2,600 mm)
Front track58 inches (1,474 mm)
Rear track56.9 inches (1,447 mm)
Dry weight3,549 lbs (1,610 Kg)
Curb weight4,034 lbs (1,830 Kg)
Tires front205/70 VR 15 Michelin as standard, Pirelli radial on request
Tires rear215/70 VR 15 Michelin as standard, Pirelli radial on request
Wheels7 ½ / 15
Top speed177 mph (285 kmh)
Bodywork2-door 2-seater mid-engine coupé
Fuel tank19.5 Imperial gallon / 25 US gallon (90 liters)
Range400/500 km (320/400 miles)
Production dates1974-1978
Engine90° V8, mounted longitudinally amidships
Bore and stroke93.9x89 mm
Total displacement4,930 cc
Displacements (unitary)616.25 cc
Compression ratio8.5:1
Maximum power330 bhp at 5,500 rpm
Maximum torque49 Kgm at 4,000 rpm (355.5 lbs/ft)
Timing geartwo valves per cylinder, twin overhead camshafts per cylinder bank
Fuel feednaturally aspirated, four Weber 42 DCNF carburetors
Fuel & lubricantN.O 90/100 RM
 

 

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