1957 Ferrari 315 S

1957 Ferrari 315 S

1957 Ferrari 315 S

Built as an evolution of the 290 MM that was named after a winning run at the 1956 Mille Miglia, the 315 S was Ferrari’s answer to a horsepower threat from Maserati and their 400 bhp V8.

Development for the 315 concentrated on the engine which used new cylinder heads designed by chief engineer Jano Vittorio. They included his classic twin overhead cam layout – the same he had just applied to Lancia’s V8.

Jano’s design used screwed in tappets which acted directed on the camshaft. With two 12-point Marelli distributors, 48 valves and 24 plugs, this engine the most complicated wade by Ferrari at the time. One major setback was the limited room for the intake manifold which obfuscated a straight intake tract.

With the new cylinder heads that bolted straight onto the 1956 block, power was up to 330 bhp and redline was increased from 6500 to 8000 rpm. These engines grew over the season by increasing to the bore and at the Mille Miglia 390 bhp had been realized with the Type 335 S.

The rest of the car was adopted from the older cars, and the chassis was similar to the 290 MM and 375 Plus with its large oval tubes triangulated by smaller diameter supports. At the rear was a 1956 version of the 5-Speed Transaxle. Brakes were similar to the Lancia D50 Drums with diagonal fins and Alfin linings that were also a Jano design.

The seven race season of the World Sportscar Championship started at Buenes Aires in Argentina at the dangerous Costanetera circuit which was won by the 290 MM car. Sebring was a failure, but the third round at Mille Miglia would be signature.

For the 1957 Mille Miglia, four large Ferraris were present, Piero Taruffi and Wolfgang von Trips each got a Ferrari 315 to themselves joined by a pair 390 bhp 335 S racecars for Peter Collins/Louis Klemantaski and Alfonso de Portago/ Edmond Nelson.

With Jaguar and Aston Martin largely absent as well as a single Maserati 450 S entered, Ferrari seemingly had an easy victory with Piero Taruffi driving number 535 to victory and Wolfgang von Trips right behind, but unfortunately it was a sad day in motor racing history.

Tragedy struck when Alfonso de Portago and Edmond Nelson had a tire blow-out at 200 kph. The results were fatal, killing 12 spectators and the passengers. This event marked the end of the Mille Miglia. After 1957, a more restricted Mille Miglia was staged in 1958, 1959 & 1961, but these were not the all-out road-races like the previous events.

The rest of the season was lackluster for Ferrari, losing Lemans and the Nurburgring to Aston and Jaguar, The final round at Venezuela decided the championship between Ferrari and Maserati, but nearly all the Maseratis dropped out, leaving Ferrari with the championship.

Many of cars still raced, and some in America, past 1957, but due to a three liter engine displacement limit, the Testa Rossa picked up where the 290, 315 and 335 left off.

Our feature 315S, chassis #0684, was the same car Piero Taruffi drove to victory at the 1957 Mille Miglia. It is seen at the 2002 Pebble Concours d’Elegance, where it took first in class after an excellent restoration.

Story by Supercars.net

1957 Ferrari 315 S Gallery

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In Detail

submitted byRichard Owen
typeRacing Car
built atModena, Italy
coachbuilderScaglietti & C.
engineAlloy,Twin Spark, 60 Degree V12 w/Dry Sump Lubrication
positionFront Longitudinal
valvetrainDOHC 2 Valves / Cyl
fuel feedSix Solex 40mm Inverted Carburettors
displacement3783 cc / 230.9 in³
bore75.95 mm / 2.99 in
stroke69.5 mm / 2.74 in
power268.5 kw / 360.1 bhp @ 7800 rpm
specific output95.19 bhp per litre
bhp/weight409.2 bhp per tonne
body / frameAluminum Body over Type 520 Oval Tube Frame
driven wheelsRWD w/LSD
wheel typeBorrani Rudge Wires
front tires6.00-16 Englebert
rear tires7.00-16 Englebert
front brakesHydrualic Drums
rear brakesHydrulaic Drums
front wheelsF 40.6 x -1.0 cm / 16 x -1.0 in
rear wheelsR 43.2 x -1.0 cm / 17 x -1.0 in
steeringRack & Pinion
f suspensionDouble Wishbnes w/Coil Springs, Houdaile Shock Absorbers
r suspensionDe Dion Axle w/Transverse Leaf Springs, Houdaile Shock Absorbers
curb weight880 kg / 1940 lbs
wheelbase2350 mm / 92.5 in
front track1310 mm / 51.6 in
rear track1286 mm / 50.6 in
transmissionType 520 5-Speed Transaxle