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BMW 525i

(1981 model)

Brief specs of 1981 BMW 525i

4-door 5-seater sedan (saloon), petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, SOHC (single overhead camshaft), 2495 cm3 / 152.3 cu in / 152.3 cu in, 110.4 kW / 148.0 hp / 148.0 hp @ 5500 rpm / 5500 rpm / 5500 rpm, 215.0 N·m / 158.6 lb·ft / 158.6 lb·ft @ 4000 rpm / 4000 rpm / 4000 rpm, manual 5-speed transmission, rear wheel drive, 196 km/h / 122 mph / 122 mph top speed, consumption 9.4 l/100km / 30.1 mpg-UK / 25.0 mpg-US

units: metric UK US

Basic (general) data

Marque (make)BMWIssued from1981
Model525iIssued 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)4130 l / 145.85 cu ft / 145.85 cu ftMax. cargo capacity (volume)

Dimensions & Weight

Length4620 mm / 181.9 in / 181.9 inTotal (curb) weight1280 kg / 2822 lb / 2822 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)
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 constructionBore86.0 mm / 3.39 in / 3.39 in
Fuelpetrol (gasoline)Stroke71.6 mm / 2.82 in / 2.82 in
Fuel detailsBore/Stroke ratio1.2
Fuel supplyBo L-Jet fuel inj.Engine displacement2495 cm3 / 152.3 cu in / 152.3 cu in
Engine Main bearings7Unitary capacity415.83 cm3/cylinder / 25.376 cu in/cylinder / 25.376 cu in/cylinder
Cam DesignSOHC (single overhead camshaft)Compression ratio9.6 : 1
SumpwetMax. output power110.4 kW / 148.0 hp / 148.0 hp at 5500 rpm / 5500 rpm / 5500 rpm
AspirationnaturalMax. torque215.0 N·m / 158.6 lb·ft / 158.6 lb·ft at 4000 rpm / 4000 rpm / 4000 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)55.4 kW / 74.3 hp / 74.3 hp (est.)
CoolantwaterSpecific output44.2 kW/l / 0.972 bhp/cu in / 0.972 bhp/cu in
Catalytic converternoSpecific torque86.2 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) ratio0.81
  Final gear (drive) ratio3.45

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed196 km/h / 122 mph / 122 mph
Acceleration 0-60 mph (97 km/h)9.60 s / 9.60 s / 9.60 sPower-to-weight ratio115.6 kW/ton / 87.6 bhp/ton / 87.6 bhp/ton
Acceleration 0-100 km/hFuel consumption, City (urban)13.1 l/100km / 21.6 mpg-UK / 18.0 mpg-US
Acceleration 0-100 mph (160 km/h)Fuel consumption, Road (extra-urban)7.2 l/100km / 39.2 mpg-UK / 32.7 mpg-US
Acceleration 80-120 km/h (50-70 mph) in topFuel consumption, Mixed (combined)9.4 l/100km / 30.1 mpg-UK / 25.0 mpg-US
Standing ¼mile time Fuel consumption, Euro
Standing kilometer time CO2 emissions225 g/km / 362 g/mi / 362 g/mi
  Range745 km / 463 mi / 463 mi

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 front195/70 HR 14Tyres rear195/70 HR 14
Brakes frontventilated discBrakes reardrum
Brake diameter front280 mm / 11.0 in / 11.0 inBrake diameter rear298 mm / 11.7 in / 11.7 in
Brakes detailsservo-assisted, ABS (anti-lock braking system)Braked area

Technical specifications and performance data of BMW 525i

Infobox

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