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Ferrari GTB Turbo - 1986

Overview

GTB Turbo

1986

Acquired in Formula 1, the turbo-charged 2-litre Ferrari V8 was developed further. The results were very good: specific power was raised to a record value of 127 bhp per litre and maximum torque was not only increased, but was now also available at a lower engine speed, substantially improving the car’s flexibility. Turbo boost came in gradually from as low as 3,000 rpm, making the car much more manageable.

Focus on

Ferrari GTB Turbo - 1986

In 1986 the Italian market “tax break” model, the GTB Turbo, together with its targa roof variant, the GTS Turbo, became the final developments of the transverse V8 engine 2 seat Ferrari series.

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The Story

Essentially the GTB Turbo was, as the name implies, a turbocharged variant of the 328 GTB, but fitted with a 2 litre engine. Like the 328 GTB, the GTB Turbo model presented a softening of the wedge profile of its predecessor, the 208 GTB Turbo, with a redesigned nose that had a more rounded profile, that was complimented by similar treatment to the tail valance panel. The revised nose and tail sections featured body colour bumpers integral with the valance panels, which reflected the work done concurrently on the Mondial 3.2 models, with which they also shared a similar radiator grille and front light assembly layout.

Thus all the eight cylinder cars in the range shared fairly unified front and rear aspects, providing a homogeneous family image. The exhaust air louvres behind the retractable headlight pods disappeared, with an increase in the size of the front lid louvre introduced on the “QV” series, and a new style and position of exterior door catch was provided. The interior trim also had a thorough overhaul, with new designs for the seat panel upholstery and stitching, revised door panels and pulls, together with more modern switchgear, which combined to reflect the external updating details.

The GTB Turbo model had some differences that differentiated it from its normally aspirated cousin, notably a different engine lid louvre and raised central panel arrangement, a NACA duct forward of each rear wheel arch, and a row of five slim exhaust air slots in the rear valance panel. It also featured the rear of roof aerofoil, which was optional on the 328 series, as standard equipment.

Ferrari GTB Turbo - 1986
Ferrari GTB Turbo - 1986

Chassis and Engine

The GTB Turbo chassis carried type reference F 106 AB/TR. Disc brakes, with independent suspension via wishbones, coil springs, and hydraulic shock absorbers, were provided all round, with front and rear anti roll bars. The V8 engine was essentially of the same design as that used in the 208 GTB Turbo model, with a bore and stroke of 66.8mm x 71mm, and a type reference number F 106 N 000.

The engine retained the Bosch K-Jetronic fuel injection system of its predecessor, but was fitted with an IHI turbocharger with a Behr intercooler operating at a boost pressure of 1.05 bar, with a Marelli MED 807 A electronic ignition system, to produce a claimed power output of 254bhp at 6500rpm. As with the earlier models the engine was mounted in unit with the all synchromesh five speed transmission assembly, which was below, and to the rear of the engine’s sump.

The GTB Turbo model continued in production for three years, during which time 308 examples were produced in the chassis number range 63277 to 83137. The early part of the series was numbered in the Ferrari odd number road car chassis sequence, and later examples in the continuous number sequence.

Careful selection of the best shots of the GTB Turbo in high definition. The photo gallery shows the distinctive features of this model Ferrari in 1986, focusing on the details and the most important parts.

Careful selection of the best shots of the GTB Turbo in high definition. The photo gallery shows the distinctive features of this model Ferrari in 1986, focusing on the details and the most important parts.

Specifications

V8  Engine

Type rear, transverse, 90° V8
Bore/stroke 66.8 x 71 mm
Unitary displacement 248.83 cc
Total displacement 1990.64 cc
Compression ratio 7.5 : 1
Maximum power 187 kW (254 hp) at 6500 rpm
Power per litre 128 hp/l
Maximum torque 328 Nm (33.5 kgm) at 4100 rpm
Valve actuation twin overhead camshafts per bank, two valves per cylinder
Fuel feed Bosch K-Jetronic injection, single turbo
Ignition Marelli electronic, single spark plug per cylinder
Lubrication wet sump
Clutch single-plate
Frame tubular steel
Front suspension independent, unequal-length wishbones, coil springs over telescopic shock absorbers, anti-roll bar
Rear suspension independent, unequal-length wishbones, coil springs over telescopic shock absorbers, anti-roll bar
Brakes discs
Transmission 5-speed + reverse
Steering rack-and-pinion
Fuel tank capacity 74 litres
Front tyres 205/55 VR 16
Rear tyres 225/50 VR 16
Type two-seater berlinetta
Length 4255 mm
Width 1730 mm
Height 1128 mm
Wheelbase 2350 mm
Front track 1485 mm
Rear track 1465 mm
Weight 1265 kg (dry)
Top speed 253 km/h
Acceleration 0-100 km/h 6.3 sec
0-400 m 14.3 sec
0-1000 m 25.7 sec