Audi V8 : Wikis (The Full Wiki)

4 Sep 2014 | Author: | Comments Off on Audi V8 : Wikis (The Full Wiki)
Audi V8

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1993 Audi V8 quattro (US)

The Audi V8 is a large luxury four-door. five-seat saloon (sedan), built by Audi AG at its Neckarsulm plant in Germany from October 1988 to November 1993, [ 1 ] as the company’s range-topping flagship model. It was the first car from the Audi marque to use its namesake engine configuration – a V8 engine .

Contents

Overview

The Audi V8 car featured as standard Audi’s ‘trademark’ quattro permanent four-wheel drive system, [ 2 ] and a 32 valve. double overhead camshaft (DOHC) V8 engine. [ 1 ] with options of a five-speed manual. six-speed manual, or four-speed electronically controlled ZF 4HP24A automatic transmissions. [ 1 ] giving it the power and performance abilities to match the then comparable V8-powered offerings from BMW and Mercedes-Benz .

The Audi V8 was never a huge sales success despite the obvious qualities of the car. From October 1988 to November 1993, approximately 21,000 Audi V8‘s were produced. The range-topping Audi V8 was released at about the same time as the original Lexus LS400. and in many respects, the Audi was a superior product both to the Lexus, and its German competitors such as the Mercedes S-Class (Mercedes-Benz W126 ), the BMW 7 Series (BMW E32 ), and the British Jaguar XJ -series (Jaguar XJ Mark 2, XJ40 ). The Audi V8 was the only car in its class to offer four-wheel drive, [ 1 ] and a fully galvanised body as standard.

The Audi V8 was specifically designed to be a top of the range ‘flagship’ car, having what was then optional features like leather seating, and Audi’s famous quattro 4wd [ 1 ] – as standard. However, this was reversed with the current Audi A8. where the base model is equipped with front-wheel drive. diesel engine – and the leather is an option!

The Audi V8 created a new ‘elevated’ image for its company, Audi AG, because customers and the motoring industry as a whole were now viewing Audi as a true manufacturer of prestigious luxury cars. providing a credible alternative to the then established competitors. In that matter, this car was a real cornerstone in developing the history of the Audi marque as we know today.

Today, the V8 has a cult following in many countries, and many examples are in the hands of enthusiasts who appreciate the quality and performance offered by what has turned out to be a durable and well-built car.

Body style

The car body style of the Audi V8 resembled the Type 44 Audi 100 and 200 models, [ 1 ] and was based on a stretched version of the Volkswagen Group C3 automobile platform. known either as the D1 or D11 [ 3 ] platform. The V8 differed from the Audi 100/200 in having a unique grille design, unique bumpers. extended wheelbase. pronounced wheel arches. all-red rear lights. and 15 or 16 roadwheels. Much attention was lavished on the vehicle’s new internal combustion engine. namely a V8 engine. although the Audi V8 was also significant in that it was the first production Audi road car to combine the quattro 4WD system with an automatic transmission .

Audi V8

There was also long wheelbase (LWB) version which was 30 centimetres (12 in ) longer than the standard V8 model, it was assembled at Steyr-Daimler-Puch factory in Graz. Approximately 300 long-wheelbase vehicles were produced.

Powertrain

Powertrain [ 1 ] detail of the Audi V8 eventually featured one of two all-new, all-aluminium alloy internal combustion engines – both petrol engines. and both V8s with thirty two valves (four valves per cylinder ) with dual valve springs. and four overhead camshafts. [ 4 ] These new designs would set the pattern for future Volkswagen Group V8 engines. As well as using an all-aluminium alloy for the cylinder block (when the established material was grey cast iron ), the camshafts were driven using hybrid methods.

A rubber /kevlar toothed timing belt. driven from the front of the crankshaft drives just one of the overhead camshafts – the exhaust camshafts in each cylinder head. The inlet camshafts are then driven via a simplex roller chain from the exhaust camshaft – the right bank, comprising cylinders 1-4 at the rear of the engine, and the left bank (cyls 5-8) at the front of the engine, immediately behind the timng belt.

This method effectively reduced the complexity of the valve gear drive timing belt layout (known to be very complex on V engines ), and as a result, required less components (idler rollers and guides) – leading to slightly easier (and therefore cheaper) maintenance of the timing belt and associated components. The actual intervals for changing the timing belts do vary – the 3.6 V8 (PT ) requires changing every 90,000 kilometres (60,000 mi ), whereas the 4.2 V8 (ABH ) goes longer between intervals at 120,000 km (75,000 mi).

A thermostatically controlled electric cooling fan also became standard, replacing the engine-driven viscous fans on earlier cars. This not only provided forced airflow for the engine coolant radiator. but also for the smaller engine oil cooler too.

Both engines use a Bosch Motronic engine control unit (ECU), with cylinder-bank selective knock control, dual barrel throttle valve, lambda mixture control via intake air volume metering and exhaust gas temperature sensor, and require unleaded petrol.

Fuel is delivered to the combustion chambers via eight manifold-sited electronic fuel injectors. fed from two common fuel rails (one per cylinder bank), and are sequentially ‘fired’ or activated in accordance with the engine firing order. It is important to note though – whilst the 3.6 V8 is able to use 95 RON fuel, for the 4.2 V8, the more expensive 98 RON ‘SuperPlus’ unleaded is required in order to make the quoted power outputs. The use of 95 RON in the 4.2 V8 will result in a lower power output, as well as increased fuel consumption.

A choice of transmissions were offered – either a five-speed manual gearbox (parts code prefix: 016, identification code: AWW) (gear ratios – 1st: 3.500, 2nd: 1.889, 3rd: 1.231, 4th: 0.903, 5th: 0.730) with a 240 millimetres (9.4 in ) single-plate clutch. or a ZF Friedrichshafen -sourced four-speed 4HP24A automatic transmission with a torque converter (parts code prefix: 018, identification codes: AKD, AYU, AZG).

Audi’s now proven ‘trademark’ quattro permanent (or semi-permanent, dependent on gearbox type) four-wheel drive system was the only offering for the driveline. The rear axle final drive unit (parts code prefix: 017, identification codes: AFV, AXZ) contains a Torsen Automatic Torque Biasing (ATB) differential. instead of the more common planetary-geared open differential. The final drive ratio is 4.111.

In August 1991, and identified by red-coloured ‘V8’ badging, Audi introduced a 4.2 litre (4,172 cc (254.6 cu in)) powerplant, [ 1 ] to compliment the choice of the existing 3.6 litre V8. This shared many components from the 3.6 V8, and this 4.2 unit was identical to the V8 used in the C4 S4 (aka Ur-S4 ), sharing the same rated outputs and ABH identification code. Like the 3.6 V8 model, the existing four-speed automatic gearbox remainded available. However, a new six-speed manual gearbox (parts code prefix: 01E, identification codes: CBM, CBN) (gear ratios – 1st: 3.500, 2nd: 1.889, 3rd: 1.320, 4th: 1.034, 5th: 0.857-CBM, 0.806-CBN, 6th: 0.730-CBM, 0.684-CBN) replaced the five-speed manual. [ 1 ]

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