1955 Ferrari 857 S
The 857 was equipped with the largest displacement version of the legendary four-cylinder in-line which started its career with World Championship victories in 1952 and 1953 and was later upped to a three-litre with the same external block dimensions.
The very few Type 857 S models built served as a basis for the development of its successor, the Type 860 Monza, which differed from it in certain technical details, such as the number of gears (four instead of five) and the shape of the majestic Scaglietti bodywork.
Ferrari 857 S Technical Specifications
Year of Manufacture – 1955
ENGINE | ||
type | front, longitudinal, in-line four | |
bore/stroke | 102 x 105 mm | |
unitary displacement | 857.98 cc | |
total displacement | 3431.93 cc | |
compression ratio | 8.5 : 1 | |
maximum power | 206 kW (280 hp) at 6000 rpm | |
power per litre | 82 hp/l | |
maximum torque | – | |
valve actuation | twin overhead camshaft per bank, two valves per cylinder | |
fuel feed | two Weber 58 DCOA/3 carburettors | |
ignition | two spark plugs per cylinder, two coils | |
lubrication | dry sump | |
clutch | multi-plate | |
CHASSIS | ||
frame | tubular steel | |
front suspension | independent, unequal-length wishbones, coil springs, hydraulic shock absorbers, anti-roll bar | |
rear suspension | de Dion, twin radius arms, upper transverse leaf spring, hydraulic shock absorbers | |
brakes | drums | |
transmission | 5-speed + reverse | |
steering | worm and sector | |
fuel tank | – | |
front tyres | 5.50 x 16 | |
rear tyres | 7.00 x 16 | |
BODYWORK | ||
type | two-seater spider | |
length | – | |
width | – | |
height | – | |
wheelbase | 2250 mm | |
front track | 1278 mm | |
rear track | 1284 mm | |
weight | – | |
PERFORMANCE | ||
top speed | – | |
acceleration 0-100 km/h | – | |
0-400 m | – | |
0-1000 m | – |