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BMW 728

(1977 model)

Brief specs of 1977 BMW 728

4-door 5-seater sedan (saloon), petrol (gasoline) 6-cylinder 12-valve straight (inline) engine, SOHC (single overhead camshaft), 2788 cm3 / 170.1 cu in / 170.1 cu in, 126.8 kW / 170.0 hp / 170.0 hp @ 6000 rpm / 6000 rpm / 6000 rpm, 235.0 N·m / 173.3 lb·ft / 173.3 lb·ft @ 3700 rpm / 3700 rpm / 3700 rpm, manual 4-speed transmission, rear wheel drive, 193 km/h / 120 mph / 120 mph top speed

units: metric UK US

Basic (general) data

Marque (make)BMWIssued from1977
Model728Issued until
Serie7Number made
Model familyE23Body construction
Model codeBody designation
ManufacturerBMWCountryDE

Bodywork

Base platformNumber of doors4
Bodywork typesedan (saloon)Number of seats5
Bodywork designerCargo capacity (volume)500 l / 17.66 cu ft / 17.66 cu ft
Passenger space (volume)4130 l / 145.85 cu ft / 145.85 cu ftMax. cargo capacity (volume)

Dimensions & Weight

Length4860 mm / 191.3 in / 191.3 inTotal (curb) weight1530 kg / 3373 lb / 3373 lb
Width1800 mm / 70.9 in / 70.9 inDry weight
Height1430 mm / 56.3 in / 56.3 inLoad capacity
Wheelbase2790 mm / 109.8 in / 109.8 inGross (max.) weight
Track front1509 mm / 59.4 in / 59.4 inTowing weight
Track rear1521 mm / 59.9 in / 59.9 inWeight distribution (front)
Ground clearanceFuel capacity85 l / 18.7 UK gal / 22.5 US gal
Length/wheelbase ratio1.74  

Aerodynamics

Drag coefficient (Cd, Cx, Cw)0.42Frontal area (A)2.19 m2 / 23.6 sq ft / 23.6 sq ft (est.)
Aerodynamic coefficient (Cd×A)0.92 m2 / 9.9 sq ft / 9.9 sq ft (est.)Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph)22.8 kW / 30.6 hp / 30.6 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)Stroke80.0 mm / 3.15 in / 3.15 in
Fuel detailsBore/Stroke ratio1.08
Fuel supply1 So carbEngine displacement2788 cm3 / 170.1 cu in / 170.1 cu in
Engine Main bearingsUnitary capacity464.67 cm3/cylinder / 28.356 cu in/cylinder / 28.356 cu in/cylinder
Cam DesignSOHC (single overhead camshaft)Compression ratio9.0 : 1
SumpMax. output power126.8 kW / 170.0 hp / 170.0 hp at 6000 rpm / 6000 rpm / 6000 rpm
AspirationnaturalMax. torque235.0 N·m / 173.3 lb·ft / 173.3 lb·ft at 3700 rpm / 3700 rpm / 3700 rpm
Compressor typeN/AMaximum rpm
IntercoolernoMax. net output (power at the wheels)64.2 kW / 86.1 hp / 86.1 hp (est.)
CoolantwaterSpecific output45.5 kW/l / 0.999 bhp/cu in / 0.999 bhp/cu in
Catalytic converternoSpecific torque84.3 N·m/l / 0.74 lb·ft/cu in / 0.74 lb·ft/cu in

Transmission

Transmission typemanualNumber of gears4
Wheel driverear wheel driveTop gear (drive) ratio1
  Final gear (drive) ratio3.64

Performance

Acceleration 0-50 mph (80 km/h)Top (maximal) speed193 km/h / 120 mph / 120 mph
Acceleration 0-60 mph (97 km/h)9.80 s / 9.80 s / 9.80 sPower-to-weight ratio111.1 kW/ton / 84.2 bhp/ton / 84.2 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
Steeringrecirculating ball PASSteering details
Turns lock-to-lockTurning circle12.0 m / 39.4 ft / 39.4 ft
Suspension frontIndependent, Coil springs, Anti-roll (anti-sway) bar (ARB)Suspension rearIndependent, Semi-trailing arm, Coil springs
Wheels frontWheels rear
Tyres front205/55-VR16Tyres rear225/50-VR16
Brakes frontdiscBrakes reardisc
Brake diameter frontBrake diameter rear
Brakes detailsABS (anti-lock braking system)Braked area

Technical specifications and performance data of BMW 728

Infobox

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(...)

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