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The 308 GTS Quattrovalvole, with a removable targa roof, succeeded the 308 GTSi, and was presented at the 1982 Paris Salon concurrently with the 308 GTB Quattrovalvole model. The Quattrovalvole part of the
model name referred to the four valves per cylinder heads on the engine, which provided increased power over the preceding model. Visually the new model was very similar to the outgoing one, but could be recognised by the
addition of a slim louvre panel in the front lid to aid radiator exhaust air exit, paired electrically operated door mirrors with a small enamel Ferrari badge on the shell, a revised radiator grille with rectangular driving
lights at the extremities, and rectangular (instead of round) side repeater lights. The interior also received some minor alterations, and cloth seat centres became available as an option to the standard full leather, whilst
the leather rim satin black three spoke steering wheel featured a triangulated section around the horn push. The removable grained satin black finished roof panel was stowed in a vinyl cover behind the seats when not in use. As
with the preceding series' of 308 models, USA market cars could be identified by heavier bumper assemblies, and rectangular side marker lights on the wings. Options available were metallic paint, a deep front spoiler, air
conditioning, wider wheels, 16" Speedline wheels with Pirelli P7 tyres, and a rear of roof satin black finished aerofoil (standard on Japanese market models).
The V8 engine was essentially of the same design as
that used in the 308 GTSi model, apart from the four valves per cylinder heads. It was of a 90 degree configuration, with belt driven twin overhead camshafts per bank, having a total capacity of 2926cc, with a bore and stroke
of 81mm x 71mm, with wet sump lubrication, bearing factory type reference F 105 AB 000 for European market cars. The claimed power output for main market European cars was 240bhp at 7000rpm, and 235bhp at 6800rpm for US market
variants. The engine was transversely mounted in unit with the all synchromesh five speed transmission assembly, which was below, and to the rear of the engine's sump. The gear and final drive ratios were altered to suit the
revised characteristics of the four valves per cylinder engine. It was fitted with a Bosch K Jetronic fuel injection system, coupled to a Marelli MED 803A Digiplex electronic ignition system, incorporating a coil, distributor
and ignition module to serve each bank of cylinders. All US market examples were fitted with catalytic convertors.
The main European market 308 GTS Quattrovalvole models had a tubular chassis with factory type reference
F 105 GS 100, Disc brakes, with independent suspension via wishbones, coil springs, and hydraulic shock absorbers, were provided all round, with front and rear anti roll bars. All models were numbered in the Ferrari odd number
road car chassis sequence of the time, with right and left hand drive available. The model was produced in a total of 3042 examples, over four times as many as the concurrent fixed roof berlinetta, between 1982 and 1985 in the
chassis number range 41701 to 59265.
Engine
Type.................................rear, transverse, 90° V8
Bore/stroke........................81 x 71 mm
Unitary displacement............365.86 cc
Total displacement..............2926.90 cc
Compression ratio................9.2 : 1
Maximum power...................176 kW (240 hp) at 7000 rpm
Power per litre.....................82 hp/l
Maximum torque..................260 Nm (26.5 kgm) at 5000 rpm
Valve actuation...................twin overhead camshafts per bank, four valves per cylinder
Fuel feed...........................Bosch K-Jetronic injection
Ignition.............................electronic, single spark plug per cylinder
Lubrication.........................wet sump
Clutch...............................single-plate
Chassis
Frametubular steel
Front/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
Bodywork
Type.................................two-seater berlinetta or two-seater targa-top
Length..............................4230 mm
Width...............................1720 mm
Height...............................1120 mm
Wheelbase.........................2340 mm
Front track........................1460 mm
Rear track.........................1460 mm
Weight..............................1275 kg (dry) berlinetta
1286 kg (dry) targa-top
Performance
Top speed.........................255 km/h
Acceleration
0-400 m............................14.5 sec
0-1000 m...........................26.2 sec
Rosso Corsa with Beige Leather
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