Aston Martin DB4

The DB4 is a grand tourer that was produced by Aston Martin from 1958 until 1963.
Mr.choppers, CC BY-SA 3.0, via Wikimedia Commons

Aston Martin DB4
Aston Martin DB4
1960 Aston Martin DB4 (Series 2)
Michael Schäfer, CC BY-SA 3.0, via Wikimedia Commons
ManufacturerAston Martin
Production1958–1963
1,204 produced[1]
1,185 DB4
19 DB4GT/Zagato
DesignerCarrozzeria Touring
Body and chassis
ClassGrand tourer
Body style2+2 coupé
2-seat coupé
2+2 drophead
LayoutFR layout
RelatedDB4 GT Zagato
Lagonda Rapide
Powertrain
Engine DOHC Straight six, 3670 cc, 240 bhp @ 5000 rpm 240 lbs-ft @ 4200 rpm
Dimensions
Wheelbase98 in (2,489 mm)[2]
Length177 in (4,496 mm)[2]
Width66 in (1,676 mm)[2]
Height52.5 in (1,334 mm)[2]
Curb weight1308 kg (2883 lb)[3]
Chronology
PredecessorAston Martin DB Mark III
SuccessorAston Martin DB5
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Aston Martin DB4

The DB4 is a grand tourer that was produced by Aston Martin from 1958 until 1963.

Technically the DB4 was not a development of the DB Mark III it replaced. It had a platform rather than a tubular chassis with a new engine by Tadek Marek. The DB4's design formed the basis for later Aston Martin models, such as the DB4 GT Zagato, the Lagonda Rapide 4-door saloon.

Design

The lightweight superleggera (tube-frame) body was designed by Carrozzeria Touring in Milan, and its Continental looks caused a sensation on its unveiling at the 1958 London Motor Show. Although the design and construction techniques were Italian, the DB4 was the first Aston to be built at the company's Newport Pagnell works in Buckinghamshire, England.

Specifications

The 3.7 L (3670 cc/223 in³) engine, designed by Tadek Marek a Polish born race driver, has double overhead cam straight-6, with cylinder head and block of cast R.R.50 aluminium alloy, a further development of the earlier engine. The engine was prone to overheating initially, but the 240 hp (179 kW)[2] produced by the twin-SU carburettor version made buyers forgive this unfortunate trait.[4] Servo-assisted disc brakes were fitted all round: early 11.5 in (292 mm) Dunlops were replaced by Girlings. Initially the DB4 fitted 16" wheels with 600H16 Avon TurboSpeed crossply tyres, or 185VR16 Pirelli Cinturato CA67 as the radial option. In 1962 they moved onto 15" wheels with 6.70V15 Avon TurboSpeed with the upgrade option of 185VR15 Pirelli Cinturato radials. The independent front suspension used ball-jointed wishbones, coil springs and rack-and-pinion steering. The live rear axle[5] also used coil springs and was located by a Watt's linkage. The normal final-drive ratio for British and European use was 3.54:1: in the United States the ratio was usually 3.77. Customers wanting a car with an especially high top speed could choose a 3.31:1 ratio.

Performance

A car with the British standard 3.54 final drive ratio tested by The Motor magazine in 1960 had a top speed of 139.3 mph (224.2 km/h) and could accelerate from 0-60 mph (97 km/h) in 9.3 seconds. A fuel consumption of 17.7 miles per imperial gallon (16.0 L/100 km; 14.7 mpg‑US) was recorded. The test car cost £3967 including taxes.[2]

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Performance

A car with the British standard 3.54 final drive ratio tested by The Motor magazine in 1960 had a top speed of 139.3 mph (224.2 km/h) and could accelerate from 0-60 mph (97 km/h) in 9.3 seconds. A fuel consumption of 17.7 miles per imperial gallon (16.0 L/100 km; 14.7 mpg‑US) was recorded. The test car cost £3967 including taxes.[2]

Models

"Series" DB4s

There were five "series" of DB4. The most visible changes were the addition of window frames in Series II and the adoption of a barred (rather than eggcrate) grille in Series IV. The Series III cars differed from the earlier ones in having taillights consisting of three small lamps mounted on a chrome backing plate. Earlier cars have single-piece units and the last Series V cars of September 1962 have similar taillights but recessed.[6] The Series V also has a taller and longer body to provide more interior space, though the diameter of the wheels was reduced to keep the overall height the same. The front of the Series V usually was of the more aerodynamic style as already used on the Vantage and GT models, a style that was later carried over to the DB5 cars.[6]

DB4 Convertible

A convertible was introduced in October 1961.[7] It featured in-house styling similar to the Touring saloon, and an extremely rare factory hardtop was also available. In total, 70 DB4 convertibles were made from a total DB4 production run of 1,110 cars.[8] 30 of these were Series IV, with the remaining 40 belonging to the Series V. 32 of the total convertibles built (11 and 21 of the different series respectively) were equipped with the more powerful Vantage engine.[6] Top speed for the regular version is about 136 mph.[9]

1962 Aston Martin DB4 Series V Convertible.
1962 Aston Martin DB4 Series V Convertible. Stephen Foskett (Wikipedia User: sfoskett), CC BY-SA 3.0, via Wikimedia Commons

DB4 GT

The DB4 GT was a special lightweight, high-performance version of the DB4. Introduced in September 1959, it featured enclosed headlights and a thinner aluminium skin for lighter weight. The wheelbase was also reduced in comparison to the standard car, which resulted in many cars not being fitted with rear seats.

The engine was what made the GT special. Available in 3.7 L (3670 cc/223 in³) and 3.8 L (3750 cc/228 in³) versions, the engine had two sparkplugs per cylinder with two distributors and three twin-choke Weber carburettors. Modifications to the cylinder head brought compression to 9.0:1 and power output was 302 hp (225 kW). Maximum speed for the GT was 151 mph (243 km/h)[10] with a 6.1 second sprint to 60 mph (97 km/h). It was the fastest road legal production car at the time.

Seventy-five GTs were built with this body style. Nineteen more were modified by the Zagato works in Italy into DB4 GT Zagatos, with plain oval grilles, Borrani wire wheels and a smoothed out rear end without the stock GT's tail fins. A single car was styled by Bertone and dubbed the Bertone Jet.

DB4 GT Continuation

In 2016 Aston Martin Works announced that a further twenty-five track-only cars based on the 1959 lightweight specification would be manufactured at its Newport Pagnell plant, each costing around £1.5M with delivery expected in late 2017.[11][12]

DB4 GT at 2004 Goodwood Revival.
DB4 GT at 2004 Goodwood Revival. Beltane43, CC BY-SA 3.0, via Wikimedia Commons

Vantage

With the introduction of the Series IV in 1961, a high-performance DB4 Vantage was offered. It featured three SU carbs and special cylinder heads, increasing power to 266 hp (198 kW). Most Vantage models used the enclosed headlights of the DB4 GT. In all, there were 136 saloons and 32 convertibles with the Vantage engine.

Vantage GT

A tiny number of non-GT DB4s used the GT's more-powerful engine. This combination is often called a Vantage GT, though not all included the Vantage package and none was technically a GT. Three Series III, five Series IV, and six Series V cars have this unusual combination of body and engine for a total of 14.

1962 Aston Martin DB4 Series 5 Vantage GT.
1962 Aston Martin DB4 Series 5 Vantage GT. Stephen Foskett (Wikipedia User: sfoskett), CC BY-SA 3.0, via Wikimedia Commons

Comments

Aston Martin Lagonda road car timeline, 1948–present.

Type 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s
89012345678901234567890123456789012345678901234567890123456789012345678901
OwnerDavid BrownWilliam WilsonMinden & SpragueVictor Gauntlett et al.FordIndependent consortium
City CarCygnet
Luxury CarRapide
2.6 ltr3 ltrRapideLagondaTaraf
Grand TourerDB4DB5 & VolanteDBS & VantageV8 VantageV8 VantageVantageVantage
DB1DB2DB2/4 & MKIIIDB6DB7DB9 & V12 VirageDB11
DBS V8 & AM V8V8 VirageV8VanquishDBS V12VanquishDBS Superleggera
Limited ProductionOne-77VulcanVictor
DB4 ZagatoV8 ZagatoDB7 ZagatoDB AR1V12 ZagatoDBS/DB9/Virage ZagatoVanquish ZagatoDBS GT ZagatoValkyrie
Valhalla
Sports prototypeV12 Speedster
SUVDBX
Concept Car
Colour code

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