Audi Quattro Technical Specifications

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Audi Quattro Technical Specifications
Audi Quattro
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With sights set on the 1981 World Rally Championship, ex-Porsche engineer Ferdinand Piech (Ferdinand Porsche was his great-uncle) concocted a supercar from mainly Audi 80 components, designated 'Quattro'.

Starting as the A1 prototype in 1977, the square-cut two-door was developed as a four-wheel-drive high performance machine, and the production version utilised the engine from the 1980-introduced 200 5T four-door saloon.

The engine was a turbocharged (KKK) fuel-injected five-cylinder in-line 2144 cc unit that used an air-to-air heat-exchanger which redensified the ingoing air at the intake by a temperature reduction of 50 deg. C. (122 deg. F.).

The temperature was in fact brought down from 130 deg. C. (266 F.) to 80 deg. C. (176 F.). The result was that, with a boost pressure of 0.85 bar (12.32 psi) at 3500 rpm, the engine gained 30 bhp (22.37 kW), developing a maximum output of 200 bhp DIN (142.54 kW). Maximum torque (210 Ib ft/281.61 Nm) was developed at 3500 rpm.

Another original feature was a microprocessor developed by Hitachi of Japan which controlled ignition advance and retard in conjunction with the injection over a spectrum of 265 sensitive periods in the operating cycle (an inlet temperature-sensitive device automatically retarded the ignition to avoid detonation, in addition to anti-knock equipment).

The main novelty of the chunky German coupe, though, was the 'total drive' concept, developed in the main from components in production for VW's cross-country 'litis'. Like the Range-Rover, all four wheels were permanently engaged in drive, the five-speed gearbox (from the Audi 200, with geared-up fifth) being mounted behind the five-cylinder engine, vertically over the front suspension.

A clever feature was the use of a hollow secondary shaft which drove the locking cage of the central differential, which in turn drove:
 
1st. The front differential via the hollow shaft, a layout which miniimises gearbox size.

2nd. Directly, via a conventional propeller-shaft, the rear axle diffferential.

To increase the already impressive traction in treacherous conditions, there were two locking devices controlled from the dashboard: a sliding, grooved ring which locked front and rear drive units 100 per cent locking on the rear differential only. The system weighed only 15.42 Ib (7 kg) more than that of the Audi 80.

The Quattro's suspension was virtually identical to the Audi 80 at the front, but at the rear the coil spring/damper system (located by a Pan hard rod) positioned the wheels with a slight toe-in attitude. In spite of its chunky lines the Quattro 4WD had a respectable CX figure of 0.40.

When shod with 205/60 VR 15 tyres it would top 135 mph (220 km/h); but it was in the acceleration department that the car was most impressive, having a 0-62 mph (0-100 km/h) figure of 7.1 seconds on dry roads, falling to a perhaps even more impressive 7.5 seconds on slippery going.

The latter graphically illustrates the efficiency of the transmission. A 16-valve version with a maximum power output of around 320 bhp (238.62 kW) was implemented for Group 4 competition.

Audi Quattro Interior

  • Number Built:
    • n/a
  • Price at Introduction:
    • n/a
  • Date of Introduction:
    • 1980
  • Chassis/Body:
    • Steel, Unitary construction (Monocoque)
  • Exterior Dimensions:
    • Total Length: 4404 mm 173.4 in
    • Total width: 1722 mm 67.8 in
    • Height at kerb weight: 1346 mm 53 in
    • Wheelbase: 2522 mm 99.3 in
    • Front Track: 1421 mm 55.9 in
    • Rear Track: 1451 mm 57.1 in
    • Drag coefficient 0.43
  • Kerb Weight:
    • 1290 kg 2844 lb
    • Weight distribution: (Front) 61.00 %
  • Fuel Tank:
    • 70 litres 15.4 UK Gal 18.5 US Gal
  • Turning Circle:
    • n/a
  • Instruments:
    • Speedometer (with integral tripmeter and odometer)
    • Tachometer
    • Petrol gauge
    • Temp gauge
    • Ammeter gauge
    • Oil gauge
  • Transmission/Performance:
    • Manual - 5 Speed, All Wheel Drive
    • Hollow secondary shaft, central differential
    • Top gear ratio 0.78
    • final drive ratio 3.89
    • 0-50 mph (80 km/h) 4.70 s
    • 0-60 mph 7.30 s
    • 0-100 km/h
    • 0-100 mph 20.70 s
    • 80-120 km/h (50-70 mph) in top
    • Standing ¼ mile 15.20 s @ 88.00 mph
    • Standing km 27.70 s @ 177.00 km/h
    • Top speed 220 km/h (137 mph)
  • Engine (In-Line Five, designed by Ferdinand Piech):
    • Capacity: 2144 cc (130.835 cu in) turbocharged KKK (S5) five cylinder
    • Type: Conventional, watercooled four stroke, reciprocating piston type, aluminium block with cast iron wet liners, 5 cylinders, 6 bearings
    • Power-to-weight 155.04 bhp/ton
    • Turbo: 1 KKK 26 turbocharger
    • Bore and Stroke: 79.50 mm × 86.40 mm (3.13 in × 3.4 in)
    • Power: 202.8 PS (200.0 bhp) (149.1 kW) @ 5500 rpm
    • Specific Output: 93.3 bhp/litre (1.53 bhp/cu in)
    • Torque: 270 lb. ft @ 5000 rpm / 132.93 Nm/litre
    • Compression Ratio: 7.00:1
  • Clutch:
    • Twin dry plate
  • Rear Axle Ratio:
    • Hypoid bevel differential
  • Maximum Speed:
    • 141 mph
  • Ignition and Electrical:
    • 12 volt, 51 amp hr.
  • Suspension:
    • Front: Independent, wishbones and coil springs. Telescopic dampers
    • Rear: Coil spring/damper system, located by a Pan hard rod
  • Steering:
    • Rack and pinion
    • Turning circle 11.30 metres
  • Brakes:
    • Disc, front and rear
    • Front: 280 mm disc
    • Rear: 280 mm disc
  • Wheels:
    • Front and Rear: 6J x 15
  • Tyres:
    • 205/60 VR 15

Audi Quattro
Also see: Audi Quattro | Audi 80 | Audi 90
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