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BMW 520i

(1981 model)

Brief specs of 1981 BMW 520i

4-door 5-seater sedan (saloon), petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, SOHC (single overhead camshaft), 1991 cm3 / 121.5 cu in / 121.5 cu in, 91.7 kW / 123.0 hp / 123.0 hp @ 5800 rpm / 5800 rpm / 5800 rpm, 170.0 N·m / 125.4 lb·ft / 125.4 lb·ft @ 4000 rpm / 4000 rpm / 4000 rpm, manual 5-speed transmission, rear wheel drive, 185 km/h / 115 mph / 115 mph top speed

units: metric UK US

Basic (general) data

Marque (make)BMWIssued from1981
Model520iIssued until
Serie5Number made
Model familyE28Body construction
Model codeBody designation
ManufacturerBMWCountryDE

Bodywork

Base platformNumber of doors4
Bodywork typesedan (saloon)Number of seats5
Bodywork designerCargo capacity (volume)
Passenger space (volume)4450 l / 157.15 cu ft / 157.15 cu ftMax. cargo capacity (volume)

Dimensions & Weight

Length4620 mm / 181.9 in / 181.9 inTotal (curb) weight1220 kg / 2690 lb / 2690 lb
Width1700 mm / 66.9 in / 66.9 inDry weight
Height1420 mm / 55.9 in / 55.9 inLoad capacity
Wheelbase2620 mm / 103.1 in / 103.1 inGross (max.) weight
Track front1430 mm / 56.3 in / 56.3 inTowing weight
Track rear1470 mm / 57.9 in / 57.9 inWeight distribution (front)58.0 % / 58.0 % / 58.0 %
Ground clearance140 mm / 5.5 in / 5.5 inFuel capacity70 l / 15.4 UK gal / 18.5 US gal
Length/wheelbase ratio1.76  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)0.39Frontal area (A)2.05 m2 / 22.1 sq ft / 22.1 sq ft (est.)
Aerodynamic coefficient (Cd×A)0.80 m2 / 8.6 sq ft / 8.6 sq ft (est.)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)19.9 kW / 26.7 hp / 26.7 hp (est.)

Engine

Engine CodeTotal number of cylinders6
Engine Typestraight (inline) (Inline, 6 cylinder)Total number of valves12
Engine ManufacturerBMWValves per cylinder2
Engine constructionBore80.0 mm / 3.15 in / 3.15 in
Fuelpetrol (gasoline)Stroke66.0 mm / 2.60 in / 2.60 in
Fuel detailsBore/Stroke ratio1.21
Fuel supplyBo L-Jet fuel inj.Engine displacement1991 cm3 / 121.5 cu in / 121.5 cu in
Engine Main bearings7Unitary capacity331.83 cm3/cylinder / 20.250 cu in/cylinder / 20.250 cu in/cylinder
Cam DesignSOHC (single overhead camshaft)Compression ratio9.8 : 1
SumpMax. output power91.7 kW / 123.0 hp / 123.0 hp at 5800 rpm / 5800 rpm / 5800 rpm
AspirationnaturalMax. torque170.0 N·m / 125.4 lb·ft / 125.4 lb·ft at 4000 rpm / 4000 rpm / 4000 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)52.7 kW / 70.7 hp / 70.7 hp (est.)
CoolantwaterSpecific output46.1 kW/l / 1.012 bhp/cu in / 1.012 bhp/cu in
Catalytic converternoSpecific torque85.4 N·m/l / 0.75 lb·ft/cu in / 0.75 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears5
Wheel driverear wheel driveTop gear (drive) ratio0.8
  Final gear (drive) ratio3.91

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed185 km/h / 115 mph / 115 mph
Acceleration 0-60 mph (97 km/h)9.70 s / 9.70 s / 9.70 sPower-to-weight ratio100.8 kW/ton / 76.4 bhp/ton / 76.4 bhp/ton
Acceleration 0-100 km/hFuel consumption, City (urban)
Acceleration 0-100 mph (160 km/h)Fuel consumption, Road (extra-urban)
Acceleration 80-120 km/h (50-70 mph) in topFuel consumption, Mixed (combined)
Standing ¼mile time Fuel consumption, Euro
Standing kilometer time CO2 emissions
  Range

Chassis

Engine locationfrontEngine alignmentlongitudinal
SteeringZF worm & roller PASSteering details
Turns lock-to-lockTurning circle10.9 m / 35.8 ft / 35.8 ft
Suspension frontIndependent, MacPherson strut, Coil springs, Lower wishbone, Lower trailing link, Anti-roll (anti-sway) bar (ARB)Suspension rearIndependent, Semi-trailing arm, Coil springs
Wheels frontWheels rear
Tyres front175 HR 14Tyres rear175 HR 14
Brakes frontventilated discBrakes reardrum
Brake diameter frontBrake diameter rear
Brakes detailsservo-assisted, ABS (anti-lock braking system)Braked area

Technical specifications and performance data of BMW 520i

Infobox

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(...)

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