Maserati 300S

Overview

Maserati built twenty-six 300S and very nearly won a world championship with them, which is a remarkable return on a car the company could barely afford to make. It arrived for 1955 as the sports-racing answer to the 250F grand prix car, using the same twin-cam straight-six with the stroke lengthened by Vittorio Bellentani to take it from 2.5 to just under three litres, wrapped in a frame of small-diameter tubes and an aluminium body beaten by Medardo Fantuzzi.

What came out is one of the best-looking racing cars of the 1950s and, by the accounts of the men who drove it, one of the best-balanced. Stirling Moss preferred it to the bigger, faster 450S and called it one of the easiest and nicest sports-racing cars ever made. It weighed about 780kg and made roughly 245bhp, less than a D-Type or a 300 SLR had, and it made the difference up in handling.

It was fast enough to beat Ferrari on a good day and fragile enough not to do it often. In 1956 it finished six points short of the championship.

Distinctions

The defining attributes and collector status that make this car garage-worthy.

Octane Files Select

Renowned for its history, engineering, or cultural weight.

Collectibility scorecard

Rated 1 to 10 on the traits that matter for owning, driving, and holding on to a car like this.

Desirability

9/10

Rarity

10/10

Driving thrill

9/10

Investment trajectory

7/10

Usability

1/10

Ease of restoration

2/10

Cultural impact

6/10

Electronic dependence

Fully analogHeavily electronic

Nothing here is electronic and very little is even electrical. Fuelling is three Weber carburettors, the ignition is a twin-plug arrangement, and the throttle is a rod. The brakes are finned alloy drums, hydraulically operated with no servo. The gearbox is a four-speed transverse unit in unit with the differential, shifted directly. The de Dion rear axle is located mechanically and sprung on a transverse leaf. There is no injection, no engine management, no aid of any kind and nothing at all standing between what the driver asks for and what the car does. It sits at the bottom of this scale by construction rather than by choice.

Market data

Demand tier, price trend, and typical values by condition. Our own assessment, not a quoted valuation.

Demand tier

EntrySolidHighBlue-chip

The proven elite. Values are established, liquid, and defended at every auction.

Value trajectory

AppreciatingStableCooling

Values are holding steady. What you pay today is what it's worth tomorrow.

Price by condition

Driver

—

Excellent

—

Concours

—

There is no price band on this page and building one would be an invention. Twenty-six cars exist, most changes of ownership happen privately through dealers who publish nothing, and the public auction record is close to empty. The one firm anchor is Bonhams' Goodwood Festival of Speed sale on 12 July 2013, where chassis 3053, the ex-Bill Spear and Sherwood Johnston car that finished third at Sebring in 1955, sold for 4,033,500 pounds including premium. That was a world record for any Maserati at auction, beating a 2,251,520-pound mark set in 2012 by nearly 78 percent, and it stood as the marque record until a 2005 MC12 made $9,460,000 at Mecum Indy in May 2026. Contemporary reporting converted the 2013 figure at about $6.1 million; the coverage of the MC12 record cites it at $6.65 million. The difference is the exchange rate used, not a second sale. After that the public record thins out. Bonhams offered chassis 3069, the ex-Fangio car, at Quail Lodge in 2017 against a $6,000,000 to $7,000,000 estimate and published no result. Individual cars are worth what their chassis history says they are worth, and no band describes that.

Buyer's guide

What anyone seriously considering this car should know first.

Why it's worth it

Twenty-six cars that took Maserati to within six points of the 1956 World Sportscar Championship

Callout

Stirling Moss preferred it to the more powerful 450S and rated it among the best-balanced sports-racers ever built

What to watch for

Buying a 300S is a research exercise before it is a mechanical one. Twenty-six cars over seventy years means most have been rebuilt more than once, and the questions that decide value are about identity rather than condition. Establish which body the car wears. Three shapes were built across the run: a short-nose first series, a rare interim series with a semi-long nose and a slightly longer tail, and the long-nose cars. A car rebodied to a different series is a different object from an original one, and since Fantuzzi worked by hand no two are identical anyway. Establish the engine. Bonhams' catalogue entries for 300S chassis carry the note about the engine number needing explanation more often than not, and a car whose engine number does not match its chassis is common rather than disqualifying, provided the history accounts for it. Then the paperwork. Maserati Classiche will certify a car against factory records, and for a competition Maserati that certification is what separates a chassis from a story. FIA papers matter as much: a 300S is eligible for the Mille Miglia, the Le Mans Classic and the Goodwood Revival, and being able to enter is a large part of what the car is for.

The Story

Driving character

The people who drove these when it mattered were unusually consistent about them. Moss, who had the 450S and the 300 SLR to compare it with, called the 300S one of the easiest, nicest, best-balanced sports-racing cars ever made, and preferred it to the more powerful 450S because it did not punish him for a mistake. The numbers explain why. About 780kg, roughly 245bhp at 6,200rpm from a twin-cam six on three Webers, and a de Dion rear axle carried over in principle from the 250F grand prix car. It has less power than a D-Type and far less than a 300 SLR, and it makes that back through weight and balance rather than grip or braking. The gearbox sits transversely in unit with the differential, which keeps the mass low and central and shortens the linkage. The brakes are finned alloy drums, and they are the part of the car that dates hardest against the disc-braked D-Type. It rewards being driven smoothly and quickly rather than hard, which is why the great drivers liked it and why lesser ones did not always shine in it.

Design

Medardo Fantuzzi's body is the reason people who have never heard of the racing record know what a 300S is. Fantuzzi ran his own panel shop in Modena and beat these shapes over bucks by hand, which is why no two are quite identical and why the surfaces have a softness no press tool produces. The proportions do the work. The engine sits low and well back in the frame, so the bonnet line is long and low, the cockpit is pushed towards the rear axle, and the tail falls away quickly. There is almost no ornament: an oval grille, cut-down doors, a headrest fairing on some cars, and the trident. The long-nose cars of 1956 extended the front to reduce drag, and the change improved the look as much as the aerodynamics. Underneath is a frame of small-diameter oval and round tubes, built in-house at first and later farmed out to Gilberto Colombo's Gilco, the same firm that supplied Ferrari. That way of thinking reached its conclusion at Maserati four years later with the Tipo 60, whose tube count earned it the Birdcage name.

Motorsport pedigree

This is the whole car, so here is the record. 1955 was bad. The 300S was quick and it broke: retirements at the Mille Miglia, Le Mans and the Targa Florio, fifth at the Tourist Trophy, and a third and a fourth at Sebring for Briggs Cunningham's privately entered cars. Redemption came in November, when Fangio won the Venezuelan Grand Prix in Caracas on the 6th for the model's first victory. 1956 was the year. Maserati signed Moss, prepared works cars for every round and gave the 300S a longer, slipperier nose. Moss and Carlos Menditéguy won the opener at Buenos Aires in January. In May, Piero Taruffi, Harry Schell, Jean Behra and Moss shared the winning car at the Nürburgring 1000km, where Moss took the lead off Fangio's Ferrari. Two wins from five rounds left Maserati second in the championship, 18 points to Ferrari's 24. 1957 belonged to the 450S, but the 300S kept scoring. Moss took over the Behra and Menditéguy car at Buenos Aires and finished second with fastest lap, quicker than the V8 he had abandoned. Then it stopped. The works team was withdrawn after 1957 and the surviving cars went to American customers.

In culture

The 300S occupies an odd cultural position. It is one of the most admired shapes of the 1950s and almost nobody outside the hobby could name it. That is partly because Maserati's public memory runs through the 250F and Fangio's 1957 title, and partly because the marque's own storytelling has always led with grand prix cars rather than sports-racers. Where it does live is at historic events. A 300S is eligible for the Mille Miglia, the Le Mans Classic and the Goodwood Revival, and enough of the twenty-six are actively campaigned that most surviving cars are seen in public regularly rather than kept still. Mark Knopfler has owned one for years and races it, which is about as close as the model comes to celebrity ownership. The other place it appears is in miniature. CMC's 1:18 model of the 300S runs to more than 1,800 individual parts and is one of the most elaborate model cars ever made, which is a strange sort of tribute and a real one. The shape is detailed enough, and revered enough, to justify the effort.

Rivals

Cars from other manufacturers that competed for the same buyers when new.

Jaguar D-Type

UK·Sports·1954–1957

Ferrari 250 Testa Rossa

Italy·Sports·1957–1961

Aston Martin DB3S

We haven’t profiled this car yet. Request to add

Mercedes-Benz 300 SLR

Germany·Sports·1955–1955

Ferrari 750 Monza

We haven’t profiled this car yet. Request to add

Owning One

Why collectors want it

There are twenty-six of these and effectively every one has a documented racing history, because there was no other reason for one to exist. That is the argument. A 300S is not a rare road car, it is a works and privateer sports-racer from the last era when a three-litre front-engined machine could win a world championship round outright, and its chassis numbers appear in the results from Sebring, the Nürburgring, Le Mans, Buenos Aires and the Targa Florio.

It also sits in the right company. The cars it raced against are the Jaguar D-Type, the Ferrari 750 Monza and the Mercedes-Benz 300 SLR, and of those four the 300S is the one you can realistically buy. Mercedes owns almost every surviving SLR, and D-Types trade at a multiple of this.

The provenance hierarchy is steep. Cars driven by Fangio and Moss sit at the top, other works entries below them, privateer chassis below that, and cars with replaced engines or rebodied histories below that again. Every 300S is worth millions. Which millions depends almost entirely on who sat in it.

Which one to look for

There are no trim levels on a works sports-racer, so the divisions that matter are body series and provenance. Three bodies were built across the run. The first-series cars have a short nose and the shortest body overall. An interim series followed with a semi-long nose and a slightly longer tail, and it is the rarest of the three. The long-nose cars came for 1956, drawn to cut drag on fast circuits, and that nose is one of the reasons the 1956 season went so much better than 1955 had. After that it is chassis history, and the spread is enormous. Cars that carried Fangio, Moss, Behra or Taruffi in works colours are the top of the market. Chassis 3067 shows why: Moss took it over during the 1957 Buenos Aires 1000km and brought it home second with fastest lap, quicker than the 450S he had started in, and Fangio then won the Cuban Grand Prix with it a month later. Below those sit the American privateer cars, several sold into Briggs Cunningham's circle, which have Sebring and SCCA records of their own.

What owning one is like

Nobody owns a 300S casually, so the honest version of this is what looking after one involves rather than what goes wrong on a wet Tuesday. The car is a hand-built 1955 racing machine: hand-formed aluminium panels over a frame of small-diameter tubes, and both are repairable by people who still work that way. Fantuzzi's panels can be beaten again. The tube frame can be sectioned and replaced. What cannot be replaced is originality, so the standing discipline among 300S owners is to keep every original part that comes off the car, however tired it looks. The engine is a competition twin-cam six that was designed to be rebuilt between races and still expects to be. Owners running the historic calendar work to a rebuild interval rather than a mileage. The drum brakes need setting up properly and will fade if asked for modern stopping distances, and the transverse gearbox is the component that most often decides whether a race weekend goes well. The rest is logistics. A multi-million-pound car driven at racing speeds is an operation before it is a hobby.

Upkeep & parts

There is no parts catalogue for a 300S. Everything is made, and the only question is who makes it.

That work concentrates in Modena and in a handful of British and American specialist shops holding patterns for Maserati competition parts: crankcases, cam covers, gear sets, and the Fantuzzi panels themselves. Lead times run to months and quotations are individual. None of this is unusual for a 1950s works sports-racer, and the network is stable precisely because the cars are actively raced rather than stored.

Maserati Classiche is the documentation route. It certifies cars over twenty years old against factory records, and on a competition chassis that certificate is worth real money, because it settles arguments about identity that no amount of mechanical work can.

The other essential is the historic-racing paperwork. FIA Historic Technical Passports govern eligibility for the Mille Miglia, the Le Mans Classic and the Goodwood Revival, and keeping a 300S compliant is an ongoing administrative job rather than a one-off. Budget for preparation, transport and entry fees the way a race team would, because that is what running one is.