Alfa collection at RM Sotheby's in Monterey 2025: One of these 11 Alfas is worth millions

Anyone who buys this Alfa Romeo collection will acquire some of the brand's fastest and most desirable cars from the 1960s: As part of the 2025 Monterey Auction, RM Sotheby's is offering a selection of rare Alfa Romeo models, some with documented racing histories. In addition to well-known models such as the Giulietta, Giulia, and GTA, these include an original SZ Coda Tronca coupé and two GTAm derivatives.

The collection is part of the 161-car Monterey Car Week auction. The eleven Alfas come from a collection the auction house calls "The Quadrifoglio Collection." The green cloverleaf remains the hallmark of the brand's sporty models to this day. This symbol is also affixed to the sides of some of the cars in the auction.

The years of manufacture range from 1958 to 1970. Estimates range from $20,000 (€17,000) for a Giulietta Sprint Bertone to $2 million (€1.7 million), which is what a T33/2 Daytona is said to fetch. This factory racer is a Porsche hunter with a real crime history . The car with chassis number 15 made its debut at the 1968 24 Hours of Daytona, finishing sixth. It later changed hands several times, ended up in Angola, was considered lost until the 1980s, and after its reappearance was in the hands of various experts and was seen at events. Today, only ten T33/2s are said to exist, which, along with its racing history, explains the car's multi-million dollar value.

We summarize eight other important models from the collection here:

1958 Alfa Romeo Giulietta Spider by Pinin Farina

• Estimated price: $40,000 to $60,000 (€34,000 to €50,000)

The first-series Giulietta Spider convertible combines a Pinin-Farina design with a high-revving 1.3-liter twin-cam engine. The vehicle on offer was used continuously as a race car and was fully restored in 1990. It features a five-speed gearbox and a 1300cc spare engine from the GT Junior series. Its history is documented by SCCA logbooks.

1961 Alfa Romeo Giulietta Sprint by Bertone

• Estimated price: $20,000 to $30,000 (€17,000 to €25,500)

This 101.02 series coupé was first registered in Italy in 1962 and later upgraded to Veloce specification with twin Weber carburetors. After being exported to Germany, the car competed in several European races before arriving in the USA in 1988. There, it was repainted, mechanically overhauled, and regularly competed in historic motorsport until the mid-1990s.

1961 Alfa Romeo Giulietta SZ "Coda Tronca"

• Estimated price: $400,000 to $500,000 (€340,000 to €425,000)

One of only 41 Zagato bodies with the aerodynamic "Coda Tronca" rear end. Delivered to New Jersey in 1961, the car was part of the Martini & Rossi team at races in Daytona, Sebring, and Bridgehampton. It is considered one of the first cars with official Martini support. The car was later restored, is street-legal, and equipped with a correct 1.3-liter engine.

1964 Alfa Romeo Giulia Sprint Speciale by Bertone

• Estimated price: 80,000 to 120,000 US dollars (70,000 to 100,000 euros)

With the typical aerodynamic lines of the SS series and a 1.6-liter twin-cam engine, this vehicle is a representative of the late version. Delivered to Italy in 1965, the car was restored in the USA and repainted in Rosso. The engine and Weber carburetor are identical to the series. The interior was refurbished to match the original.

1964 Alfa Romeo Giulia TZ-1 "Double Bubble"

• Estimated price: 700,000 to 900,000 US dollars (600,000 to 750,000 euros)

The chassis was built for the 1.95 m tall Dmitri Nabokov with a "double-bubble" roof. The car participated in numerous international races in 1964 and 1965, including Monza, Zolder, Hockenheim, and Bathurst. After several stops, the car came into the hands of a collector in 1991. A later technical overhaul ensured its roadworthiness, while preserving its original structure.

1966 Alfa Romeo Giulia Sprint GTA

• Estimated price: 125,000 to 175,000 US dollars (105,000 to 150,000 euros)

The lightweight coupe with its aluminum body was extensively restored in the late 1980s and subsequently used in historic racing series in the USA. The current engine comes from a Giulia GTC, and the vehicle itself largely conforms to GTA specifications. Further maintenance work was performed by Horst Kwech in 2008.

1967 Alfa Romeo Giulia GT 1300 Junior

• Estimated price: $25,000 to $35,000 (€21,500 to €30,000)

This GT Junior was originally delivered in Genoa and was converted early on with Autodelta components for motorsport. In the 1980s, the car competed in historic races in Great Britain and later in the USA. According to the registration, the engine comes from a GTA, and other technical features indicate racing use. Partial documentation is available.

1970 Alfa Romeo 1750 GTAm

• Estimated price: $200,000 to $250,000 (€170,000 to €215,000)

Two GTAm-spec vehicles round out the Alfa Romeo lineup. The first example was delivered to Belgium in 1970 and later acquired by racing driver Franz Abraham. The second GTAm was developed from a 1750 GT Veloce originally produced for the US market. Both vehicles were converted to race-ready specifications, used in the US, and recently received technical overhauls. An SVRA history is available.