V8 Saloon Weber efi

V8 Saloon Weber efi Description

In production: 1986 – 1989

Chassis numbers: 12-00 – 12700

- shared with five V8 Vantage 540 cars and with the V8 Vantage 580X range

Pressure to continually clean up exhaust emissions necessitated the re-adoption of fuel injection in 1986, but this time, it was an electronic system by Weber-Marelli used for the first time on a production car outside Italy. This was announced on the 25th January in 1986 at the New York Show and the engine, designated as V585 (85 for 1985), was used across the entire V8 range with the exception of the V8 Vantage which retained Weber carburettors. Externally, the electronic fuel injection (efi) car was very similar to the Oscar India, but most easily identified by the flatter bonnet, permitted by the less bulky fuel injection. Another change was the publication, after many years, of the power developed by the V8 engine with 305 bhp being quoted.

From 1985 to 1989, only 59 efi AM V8s were built making them one of the rarest V8 derivatives. 42 cars were built right hand drive with all but one for the British market, the other car being sold in Japan. Only five of the right hand drive cars were built with the five-speed ZF manual gearbox. The remaining 17 left hand drive examples were sold within mainland Europe and Japan with a single example sold in the USA. Only three were built with manual transmission including the US bound example. Cars sold in Japan, the US and from 1988 Switzerland received the Federal specification lead-free engine.

V8 Saloon Weber efi Derivatives

A single efi AM V8, right hand drive, UK specification, automatic 1987MY example was built to a rather unique specification following a customer request. Chassis 12541 was made with an additional 175 mm inserted into the wheelbase (from 2610 mm to 2785 mm). So far as the Registrars are aware, until the 2013 Aston Martin Centenary Celebration in Kensington Gardens, only a single photograph of this very special car had ever been published, in the 1990 book, 'AML, Volume 2: V8 models from 1970' by Paul Chudecki. The additional length in the door is easily visible in the much enlarged front quarter light.

V8 Saloon Weber efi Specification

Body / Coachwork
Two-door 2+2 coupe
Steel platform chassis with handcrafted aluminium alloy body panels
Dual 7'' quartz-halogen headlamps, optional Cibie 7'' driving lights
Built-in rear spoiler, redesigned flat bonnet
Full Connolly leather interior including roof lining
Air-conditioning system
Adjustable seats with tilting squabs to allow access to the rear seats
Walnut facia and cappings
Wool pile carpets
Blaupunkt Toronto SQR46 or 48 stereo radio cassette, four speakers and electric aerial
Front-mounted all-alloy 90° V8, 5,340 cc, two valves per cylinder, twin overhead camshafts per bank. Engine number prefix V585/
Bore 100 mm. Stroke 85 mm. Compression ratio 9.3:1 (8.0:1 Emission Control LFM & LFA)
Weber-Marelli electronic fuel injection
Maximum power: not quoted but about 315 bhp @ 5,000 rpm (200 +/- bhp on Emission Control LFA & LFM engine)
Maximum torque: not quoted but about 345 lb.ft @ 3,500 rpm
Air injection system: AC Delco air pump, two from 1988
Four catalytic convertors on Emission Control LFM & LFA
Chrysler TorqueFlite three-speed automatic
Manual: five-speed ZF optional at additional cost. Hydraulically-operated 10½" Borg and Beck single dry-plate diaphragm clutch
Optional cruise control with auto gearbox
Final drive: Salisbury hypoid bevel with Powr-Lok limited slip differential
Final drive ratio: 3.54:1 (manual cars & North America specification), 3.058:1 (automatic)
Power-assisted rack and pinion 2.9 turns lock to lock. Turning circle between curbs of 11.58 metres
Wheels and Tyres
Bolt-on, five-stud, BBS Mahle cast aluminium alloy 7J x 15
Avon Turbosteel 235/70 VR15 (automatic), Avon Textile 225/70 VR15 (manual)
Front: unequal transverse wishbones, coil springs and co-axial Armstrong telescopic shock absorbers with an anti-roll bar
Rear: rear suspension was by coil spring with the de Dion tube located by parallel trailing links and a Watts linkage and sprung by co-axial spring shock absorber units
Front: ventilated steel discs, 267 mm (10.51") diameter
Rear: ventilated steel discs, 264 mm (10.39") diameter mounted inboard
Tandem master cylinders and dual vacuum servo assistance
Length: 4,670 mm, 4,700 mm with overriders, 4,780 mm with 5 mph impact bumpers
Width: 1,829 mm
Height: 1,327 mm
Kerb weight: 1,818 kg (1,860 kg USA)
Wheelbase: 2,610 mm
Front track: 1,499 mm
Rear track: 1,499 mm
Fuel tank capacity: 97.5 litres
No known tests but performance not dissimilar to AM V8 Oscar India specification
Price (including UK purchase tax/VAT and car tax where applicable)
January 1986: £55,000, (USA, $110,000)
October 1986: £58,500
March 1987: £65,000
October 1987: £69,500, (USA $127,000)
March 1988: £74,500, (USA $142,000)
September 1988: £81,500, (USA $142,000)
February 1989: £92,000
August 1989: £92,000

V8 Saloon Weber efi Number Guide

The first production AM V8 with the efi engine was 12500 and the final AM V8 saloon was chassis number 12700 which is why the production figure of 200 is sometimes erroneously quoted. Of course the AM V8s and V8 Vantage still continued to share the same chassis number range. By this time, all cars were given 17 digit VIN numbers with an ‘S’ in position 8 to indicate the regular car and ‘V’ for Vantage. Although the first cars were built in 1985, they were identified as 1986 model year due to the ‘G’ at position 10 in the VIN. The final cars were 1989 model year with the date code ‘K’. All engines had the prefix V585/ and initially had the suffix /S although this was stopped after the first few cars had been completed. Chassis and engine numbers continued to be matched.

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