1981 BMW 525i, 1985 MY E28

This vehicle has a 4 door saloon (sedan) body style with a front located engine powering the rear wheels. The BMW 525i is one of the E28 range of cars from BMW. The 2.5 litre engine is a naturally aspirated, single overhead camshaft, 6 cylinder that develops 148 bhp (150 PS/110 kW) of power at 5500 rpm, and maximum torque of 215 N·m (159 lb·ft/21.9 kgm) at 4000 rpm. The engine transfers its power through to the wheels via a 5 speed manual transmission. The quoted kerb weight is 1280 kg. Maximum speed quoted is 196 km/h, which is 122 mph.

Pictures

BMW 5-series E28 -
BMW 5-series E28
Image courtesy of BMW

Key facts

1981 BMW 525i, 1985 MY E28 information summary

What body style?
4 door sedan/saloon with 4/5 seats
How long?
4620 mm
How heavy?
1280 kg
What size engine?
2.5 litre, 2495 cm3
How many cylinders?
6, Straight
How much power?
150 PS / 148 bhp / 110 kW @ 5500 rpm
How much torque?
215 Nm / 159 ft.lb / 21.9 kgm @ 4000 rpm
How quick?
0-60 mph: 9.6 s
How fast?
196 km/h, 122 mph

BMW E28 models

4 door sedan/​saloon FR 4M 1766 cm3 105 PS 103.5 bhp 77 kW 1140 kg
BMW 524td -
4 door sedan/​saloon FR 5M 2443 cm3 115 PS 113 bhp 84 kW 1330 kg
BMW 524td -
4 door sedan/​saloon FR 4A 2443 cm3 115 PS 113 bhp 84 kW
4 door sedan/​saloon FR 5M 2693 cm3 123 PS 121 bhp 90 kW
4 door sedan/​saloon FR 4A 2693 cm3 123 PS 121 bhp 90 kW
4 door sedan/​saloon FR 5M 3210 cm3 184 PS 181.5 bhp 135 kW
4 door sedan/​saloon FR 4A 3210 cm3 184 PS 181.5 bhp 135 kW
4 door sedan/​saloon FR 5M 2693 cm3 125 PS 123 bhp 92 kW 1250 kg
4 door sedan/​saloon FR 4A 2693 cm3 125 PS 123 bhp 92 kW
4 door sedan/​saloon FR 5M 1766 cm3 90 PS 89 bhp 66 kW 1140 kg
4 door sedan/​saloon FR 5M 1991 cm3 125 PS 123 bhp 92 kW 1220 kg
BMW 528i -
4 door sedan/​saloon FR 5M 2788 cm3 184 PS 181.5 bhp 135 kW 1300 kg
BMW 5-series E28 -
4 door sedan/​saloon FR 4A 2788 cm3 184 PS 181.5 bhp 135 kW 1330 kg

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1981 BMW 525i data
bodywork
Body type4/5 seater sedan/saloon
Number of doors4
Designer
dimensions & weights
mminches
Wheelbase 2620 mm 103.1 inches
Track/tread (front) 1430 mm 56.3 inches
Track/tread (rear) 1470 mm 57.9 inches
Length 4620 mm 181.9 inches
Width 1700 mm 66.9 inches
Height 1420 mm 55.9 inches
Ground clearance 140 mm 5.5 inches
length:wheelbase ratio 1.76
Kerb weight 1280 kg 2822 lb
Weight distribution
fuel tank capacity 70 litres 15.4 UK Gal 18.5 US Gal
aerodynamics
Drag coefficient 0.39
Frontal area
CdA
engine
engine type naturally aspirated petrol
Engine manufacturer BMW
Engine code
Cylinders Straight 6
Capacity 2.5 litre
2495 cc
(152.254 cu in)
Bore × Stroke 86 × 71.6 mm
3.39 × 2.82 in
Bore/stroke ratio 1.2
Valve gear single overhead camshaft (SOHC)
2 valves per cylinder
12 valves in total
maximum power output
(DIN)
150 PS (148 bhp) (110 kW)
at 5500 rpm
Specific output
(DIN)
59.3 bhp/litre
0.97 bhp/cu in
maximum torque
(DIN)
215 Nm (159 ft·lb) (21.9 kgm)
at 4000 rpm
Specific torque
(DIN)
86.17 Nm/litre
1.04 ft·lb/cu3
Engine construction
sump wet sumped
compression ratio 9.6:1
Fuel system Bosch L-Jetronic fuel injection
bmep (brake mean effective pressure) 1082.9 kPa (157.1 psi)
Maximum RPM
crankshaft bearings 7
Engine coolant Water
Unitary capacity 415.83 cc
Aspiration Normal
Compressor N/A
Intercooler None
Catalytic converter N
performance
Acceleration 0-80km/h (50mph)
Acceleration 0-60mph 9.6 s
Acceleration 0-100km/h
Acceleration 0-160km/h (100mph)
Standing quarter-mile 16.9 s
Standing kilometre
Maximum speed 196 km/h (122 mph)
Power-to-weight ratio 117.23 PS/tonne (1000 kg)
86.22 kW/tonne (1000 kg)
115.63 bhp/tonne (1000 kg)
0.05 bhp/lb
Weight-to-power ratio 11.6 kg/kW
19.37 lb/bhp
fuel consumption
Fuel consumption
universal consumption (calculated from the above)
litres/100km
km/litre
UK MPG
US MPG
Carbon dioxide emissions
Carfolio Calculated CO2 ?
VED band (UK)
CO2 Effizienz (DE)
chassis
Engine position front
Engine layout longitudinal
Drive wheels rear wheel drive  
Torque split N/A
Steering
turns lock-to-lock
Turning circle 10.90 m
Front suspension I.MS.CS.LW.LowTrailLi.ARB.
Rear suspension I.STA.CS.
Wheel size front
Wheel size rear
Tyres front 195/70 HR 14
Tyres rear 195/70 HR 14
Brakes F/R VeDi/Dr-S
Front brake diameter 280 mm
Rear brake diameter
Braked area
Gearbox 5 speed manual
Top gear ratio 0.81
Final drive ratio 3.45
general
Carfolio.com ID31647
Production total
Model code
Model family E28
RAC rating 27.5
Insurance classification No information available
Tax band No information available
1981 BMW 525i added before December 1995.
Last modified 2013-02-28.