Overview
1957
315 S
Fitted with a V12 with four chain-driven overhead camshafts, the 315 S signalled a major advance on the single camshaft engine. In addition to being more powerful, the engine was also nine kilos lighter and more reliable to boot. At the tragic 1957 Mille Miglia, the scene of De Portago’s devastating accident, Piero Taruffi drove the 315 S to victory in what was also to be the final race of his career.
Specifications
V12 Engine
| Type | front, longitudinal 60° V12 |
| Bore/stroke | 76 x 69.5 mm |
| Unitary displacement | 315.28 cc |
| Total displacement | 3783.40 cc |
| Compression ratio | 9 : 1 |
| Maximum power | 265 kW (360 hp) at 7800 rpm |
| Power per litre | 95 hp/l |
| Maximum torque | - |
| Valve actuation | twin overhead camshafts per bank, two valves per cylinder |
| Fuel feed | six Weber 42 DCN carburettors |
| Ignition | twin plugs, four coils |
| Lubrication | dry sump |
| Clutch | multi-plate |
| Frame | tubular steel |
| Front suspension | independent, unequal-length wishbones, coil springs, hydraulic shock absorbers |
| Rear suspension | de Dion, twin radius arms, transverse leaf spring, hydraulic shock absorbers |
| Brakes | drums |
| Transmission | 4-speed + reverse |
| Steering | worm and sector |
| Fuel tank | - |
| Front tyres | 6.00 x 16 |
| Rear tyres | 7.00 x 16 |
| Type | two-seater spider |
| Length | - |
| Width | - |
| Height | - |
| Wheelbase | 2350 mm |
| Front track | 1296 mm |
| Rear track | 1310 mm |
| Weight | 880 kg (dry) |
| Top speed | 290 km/h |
| Acceleration 0-100 km/h | - |
| 0-400 m | - |
| 0-1000 m | - |