The Aston Martin DB4 was produced over a five-year period, successfully combining sturdy British engineering with attractive Italian styling. At its introduction in October of 1958, the DB4 marked a new era of development for Aston Martin as it was the first car of the David Brown era which neither used a chassis derived from the experimental Atom of 1939 nor an engine designed under the auspices of W O Bentley. Additionally, it was the first Aston Martin to wear Carrozzeria Touring's 'Superleggera' bodywork, in which light alloy panels were fixed to a framework of light-gauge steel tubes welded to a platform chassis. The DB4's fastback coachwork was styled by Touring and built under license at Newport Pagnell by Aston Martin's Tickford subsidiary.
At the time of its introduction, the DB4, with its aerodynamic styling, all-aluminum, Superleggera coachwork, and 3.7-liter engine was Britain's most powerful and fastest production car. The engine, designed by Polish engineer Tadek Marek, had first been seen at Le Mans the previous year in the DBR2. Marek had joined the company in 1954, and previously enjoyed a racing career and posts with General Motors and FIAT in Poland, the design of tanks during WW2, and had arrived at Newport Pagnell from Austin.
The all-alloy engine had twin-overhead-camshafts, 'square' bore and stroke dimensions of 92mm for a displacement of 3,670cc, and developed its maximum output of 240bhp at 5,500rpm. The David Brown gearbox was a new four-speed all-synchromesh unit. The new platform-type chassis replaced the DB2/4's multi-tubular spaceframe, the latter being considered incompatible with Touring's Superleggera body construction. The DB2/4's trailing-link independent front suspension gave way to unequal-length wishbones, while at the rear the DB4 sported a live axle located by trailing links and a Watts linkage instead of its predecessor's Panhard rod.
Aston Martin produced the DB4 between October 1958 and June of 1963 (developed through no fewer than five unofficial series, suggested subsequently by the Aston Martin Owners Club to aid identification as the model evolved.) The first of these unofficial series included the fitting of heavy-duty bumpers after the first 50 cars before the second series arrived in January 1960. The first fifty cars had 'frame-less' windows, a rear-hinged bonnet, bumpers without over-drives, and 'cathedral' rear lights. Series II cars received window frames, bigger brake calipers, an enlarged sump, and front-hinged bonnet. Series III cars had taillights consisting of three small lamps mounted on a chrome backing plate, replacing the earlier single-piece units. Series IV cars had a barred, rather than eggcrate, grille (with seven vertical bars), shallower bonnet intake, and an optional higher-specification 'Vantage' engine. Series V had recessed taillights, an electric radiator fan, DB4 GT-Type instrument panel, smaller wheels, and a taller and longer (by 3.5-inches) body offering more interior space.
Along with the Touring saloon, a convertible body style joined the lineup in October of 1961, and a rare factory hardtop was also available. Of the 1,204 examples of the DB4 built, 19 were DB4GT with Zagato coachwork, and 70 were convertibles including 30 Series IV and 40 Series V. 32 of the 70 convertibles (including 11 Series IV and 21 Series V) were equipped with the more powerful Vantage engine.
The Vantage specification became available in 1961 with the introduction of the Series IV. Modifications included special cylinder heads and three SU carburetors resulting in 266 horsepower. Most of the 136 saloons and 32 convertible Vantage models used the enclosed headlights of the DB4 GT. The DB4 GT was introduced in September of 1959 and was a high-performance and lightweight version of the DB4. Thinner aluminum skin reduced the vehicle's overall weight, the wheelbase was reduced resulting in many examples being devoid of rear seats, and the headlights were enclosed. The 3.7- and 3.8-liter engines received two sparkplugs per cylinder, three twin-choke Weber carburetors, 9.0:1 compression, and two distributors, resulting in 302 hp. Able to sprint from zero-to-sixty mph in 6.1 seconds, and a maximum speed of 151 mph, the DB4 GT was the fastest road-legal production car at the time.
Seventy-five GTs were built with this body style, and an additional nineteen were modified by the Zagato works in Italy to designs by twenty-three-year-old designer Ercole Spada, creating the DB4 GT Zagatos. Distinguishable design cues of the Zagato bodied cars include Borrani wire wheels, a smoother rear end lacking the stock GT's tail fins, and a plain oval grille. The DB4 GT Zagato was raced in the 1962 LeMans 24 Hours race by such famous names as Roy Salvadori and Jim Clark.
In 1960 Aston Martin sent the very last DB4 GT chassis, number 020IL, to Italy to be bodied by Bertone's Giorgetto Giugiaro. The car, known as the Bertone Jet, was unveiled at the Geneva Auto Salon in 1961. It was 200 pounds heavier than the standard aluminum DB4 due to its steel coachwork, and its design was reminiscent of the Bertone-bodied Ferraris of the period.
by Dan Vaughan