1966 Ferrari 275 GTB4
Presented at the 1966 Paris Motor Show, this was the first ‘production’ Ferrari to be fitted with the four overhead camshaft version of the V12, and was derived directly from the P2 prototype.
The 275 GTB/4 was virtually identical visually to the “long nose” two camshaft models, and without lifting the bonnet, there was only one easy distinguishing feature. This was the profile of the bonnet, which on the 275 GTB/4 had a slim shallow central bulge running from front to rear. This should not be confused with the wide flat raised centre section of the bonnet seen on early two camshaft cars.
As with the two camshaft cars, the Pininfarina designed body was constructed by Scaglietti, normally in steel with aluminium doors, bonnet, and boot lid, although a few examples received full aluminium bodies.
The basic dimensions and layout of the engine were similar to that of the two camshaft unit of the 275 GTB, but fitted with new cylinder heads that featured twin overhead camshafts per bank of cylinders, with factory type reference 226, still of 3286cc capacity, with a bore and stroke of 77mm x 58.8mm, with the sparking plugs sited between the camshafts.
Ferrari 275 GTB4 Technical Specifications
Year of Manufacture – 1966
|type||front, longitudinal 60° V12|
|bore/stroke||77 x 58.8 mm|
|unitary displacement||273.81 cc|
|total displacement||3285.72 cc|
|compression ratio||9.2 : 1|
|maximum power||221 kW (300 hp) at 8000 rpm|
|power per litre||91 hp/l|
|valve actuation||twin overhead camshafts per bank, two valves per cylinder|
|fuel feed||six Weber 40 DCN 9 carburettors|
|ignition||single spark plug per cylinder, two coils|
|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|
|transmission||5-speed + reverse|
|steering||worm and roller|
|fuel tank||capacity 94 litres|
|front tyres||205 x 14|
|rear tyres||205 x 14|
|front track||1401 mm|
|rear track||1417 mm|
|weight||1100 kg (dry)|
|top speed||268 km/h|
|acceleration 0-100 km/h||–|