1979 BMW 728i Automatic E23

The 728i is a rear wheel drive saloon (sedan) motor vehicle with a front mounted engine, sold by BMW. The BMW 728i belongs to the E23 range of cars from BMW. Power is produced by a single overhead camshaft, 2.8 litre naturally aspirated 6 cylinder engine, with 2 valves per cylinder that provides power and torque figures of 181 bhp (184 PS/135 kW) at 5800 rpm and 240 N·m (177 lb·ft/24.5 kgm) at 4200 rpm respectively. The engine powers the wheels via a 3 speed automatic gearbox. It weighs a claimed 1505 kg at the kerb. Its maximum speed stated is 190 km/h or 118 mph.

Pictures

Key facts

1979 BMW 728i Automatic E23 information summary

What body style?
4 door sedan/saloon with 4/5 seats
How long?
4860 mm
How heavy?
1505 kg
What size engine?
2.8 litre, 2788 cm3
How many cylinders?
6, Straight
How much power?
184 PS / 181 bhp / 135 kW @ 5800 rpm
How much torque?
240 Nm / 177 ft.lb / 24.5 kgm @ 4200 rpm
How quick?
0-100 km/h: 11.5 s
How fast?
190 km/h, 118 mph

BMW E23 models

4 door sedan/​saloon FR 3A 3210 cm3 180 PS 177.5 bhp 132 kW 1520 kg
4 door sedan/​saloon FR 5M 3430 cm3 218 PS 215 bhp 160 kW 1500 kg
4 door sedan/​saloon FR 4A 3430 cm3 252 PS 248.5 bhp 185 kW 1590 kg
4 door sedan/​saloon FR 3A 3210 cm3 175 PS 173 bhp 129 kW 1610 kg
4 door sedan/​saloon FR 4M 2788 cm3 184 PS 181 bhp 135 kW 1490 kg
4 door sedan/​saloon FR 5M 2788 cm3 184 PS 181 bhp 135 kW 1470 kg
4 door sedan/​saloon FR 5M 3210 cm3 200 PS 197 bhp 147 kW 1500 kg
4 door sedan/​saloon FR 5M 3453 cm3 218 PS 215 bhp 160 kW 1530 kg
BMW 745i -
4 door sedan/​saloon FR 3A 3210 cm3 252 PS 248.5 bhp 185 kW 1600 kg
BMW 728 -
4 door sedan/​saloon FR 4M 2788 cm3 170 PS 168 bhp 125 kW 1530 kg
4 door sedan/​saloon FR 3A 2788 cm3 170 PS 168 bhp 125 kW 1550 kg
4 door sedan/​saloon FR 4M 2986 cm3 184 PS 181 bhp 135 kW 1580 kg
4 door sedan/​saloon FR 3A 2986 cm3 184 PS 181 bhp 135 kW 1600 kg
BMW 733i -
4 door sedan/​saloon FR 4M 3210 cm3 200 PS 197 bhp 147 kW 1600 kg
4 door sedan/​saloon FR 3A 3210 cm3 200 PS 197 bhp 147 kW 1620 kg

Similar models

4 door sedan/​saloon FF 3A 2144 cm3 172 PS 170 bhp 127 kW 1260 kg
4 door sedan/​saloon FF 5M 2144 cm3 172 PS 170 bhp 127 kW 1260 kg
4 door sedan/​saloon FR 5M 2746 cm3 185 PS 182 bhp 136 kW 1475 kg
Mercedes-Benz 280 E -
4 door sedan/​saloon FR 4M 2746 cm3 185 PS 182 bhp 136 kW 1475 kg
4 door sedan/​saloon FR 4M 2746 cm3 188 PS 185 bhp 138 kW 1460 kg
4 door sedan/​saloon FR 4A 2746 cm3 185 PS 182 bhp 136 kW 1475 kg
4 door sedan/​saloon FR 5M 2746 cm3 185 PS 182 bhp 136 kW
4 door sedan/​saloon FR 4M 2746 cm3 185 PS 182 bhp 136 kW 1560 kg
4 door sedan/​saloon FR 4M 2746 cm3 185 PS 182 bhp 136 kW 1610 kg
4 door sedan/​saloon FR 4A 2746 cm3 185 PS 182 bhp 136 kW
4 door sedan/​saloon FR 4A 2746 cm3 185 PS 182 bhp 136 kW
4 door sedan/​saloon FR 5M 2746 cm3 185 PS 182 bhp 136 kW
4 door sedan/​saloon FR 4M 2746 cm3 185 PS 182 bhp 136 kW 1590 kg
4 door sedan/​saloon FR 4M 2746 cm3 185 PS 182 bhp 136 kW 1645 kg
4 door sedan/​saloon FR 4A 2746 cm3 185 PS 182 bhp 136 kW
4 door sedan/​saloon FR 4A 2746 cm3 185 PS 182 bhp 136 kW
Opel Senator -
4 door sedan/​saloon FR 5M 2969 cm3 183 PS 180 bhp 134 kW 1485 kg
4 door sedan/​saloon FR 3A 2969 cm3 183 PS 180 bhp 134 kW 1495 kg
4 door sedan/​saloon FR 3A 3376 cm3 183 PS 180 bhp 134 kW 1845 kg
1979 BMW 728i Automatic data
bodywork
Body type4/5 seater sedan/saloon
Number of doors4
Designer
dimensions & weights
mminches
Wheelbase 2795 mm 110 inches
Track/tread (front) 1508 mm 59.4 inches
Track/tread (rear) 1522 mm 59.9 inches
Length 4860 mm 191.3 inches
Width 1800 mm 70.9 inches
Height 1430 mm 56.3 inches
Ground clearance
length:wheelbase ratio 1.74
Kerb weight 1505 kg 3318 lb
Weight distribution
fuel tank capacity 85 litres 18.7 UK Gal 22.5 US Gal
aerodynamics
Drag coefficient
Frontal area
CdA
engine
engine type naturally aspirated petrol
Engine manufacturer BMW
Engine code M30
Cylinders Straight 6
Capacity 2.8 litre
2788 cc
(170.134 cu in)
Bore × Stroke 86 × 80 mm
3.39 × 3.15 in
Bore/stroke ratio 1.08
Valve gear single overhead camshaft (SOHC)
2 valves per cylinder
12 valves in total
maximum power output
(DIN)
184 PS (181 bhp) (135 kW)
at 5800 rpm
Specific output
(DIN)
64.9 bhp/litre
1.06 bhp/cu in
maximum torque
(DIN)
240 Nm (177 ft·lb) (24.5 kgm)
at 4200 rpm
Specific torque
(DIN)
86.08 Nm/litre
1.04 ft·lb/cu3
Engine construction cast iron block; light alloy head
sump wet sumped
compression ratio 9.3:1
Fuel system Bosch L-Jetronic fuel injection
bmep (brake mean effective pressure) 1081.8 kPa (156.9 psi)
Maximum RPM
crankshaft bearings 7
Engine coolant Water
Unitary capacity 464.67 cc
Aspiration Normal
Compressor N/A
Intercooler None
Catalytic converter N
performance
Acceleration 0-80km/h (50mph)
Acceleration 0-60mph
Acceleration 0-100km/h 11.5 s
Acceleration 0-160km/h (100mph)
Standing quarter-mile
Standing kilometre 33 s
Maximum speed 190 km/h (118 mph)
Power-to-weight ratio 121.94 PS/tonne (1000 kg)
89.68 kW/tonne (1000 kg)
120.27 bhp/tonne (1000 kg)
0.05 bhp/lb
Weight-to-power ratio 11.15 kg/kW
18.63 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 3.800
Turning circle
Front suspension I.CS.ARB.
Rear suspension I.STA.CS.
Wheel size front 6J x 14 H2
Wheel size rear 6J x 14 H2
Tyres front 195/70 HR 14 88H
Tyres rear 195/70 HR 14 88H
Brakes F/R VeDi/Di-S
Front brake diameter 280 mm
Rear brake diameter 280 mm
Braked area
Gearbox 3 speed automatic
Top gear ratio 1
Final drive ratio 3.64
general
Carfolio.com ID274923
Production total
Model code
Model family E23
RAC rating 27.5
Insurance classification No information available
Tax band No information available
1979 BMW 728i Automatic added 2012-06-07.
Last modified 2013-02-28.