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BMW E23 7 Series 730
BMW E23 7 Series 730 (1977)
BMW E23 7 Series 728
BMW E23 7 Series 728 (1977)
BMW E23 7 Series 725i
BMW E23 7 Series 725i (1981)
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Engine Technical Data
Engine type - Number of cylinders
Inline 6
Inline 6
Inline 6
Engine Code
M68
M68
M107
Fuel type
Petrol
Petrol
Petrol
Fuel System
Solex 4A1 carburettors
Solex 4A1
Bosch L-Jetronic fuel injection
Lubrication
Wet sump
Engine Cooling
Water
Engine Alignment
Longitudinal
Longitudinal
Longitudinal
Engine Position
Front
Front
Front
Engine displacement
2986 cm3 / 182.2 cu-in
2788 cm3 / 170.1 cu-in
2494 cm3 / 152.2 cu-in
Bore
89 mm
3.5 inches
86 mm
3.39 inches
86 mm
3.39 inches
Stroke
86 mm
3.39 inches
80 mm
3.15 inches
71.5 mm
2.81 inches
Number of valves
12
12
12
Aspiration
N/A
N/A
N/A
Compression Ratio
9
9
9.6
Horsepower
184 PS / 181 HP / 135 kW @ 5800 rpm
170 PS / 168 HP / 125 kW @ 5800 rpm
150 PS / 148 HP / 110 kW @ 5500 rpm
Maximum torque
255 Nm / 188 lb-ft @ 3500 rpm
233 Nm / 171 lb-ft @ 4000 rpm
215 Nm / 158 lb-ft @ 4000 rpm
Drive wheels - Traction - Drivetrain
RWD
RWD
RWD
Transmission Gearbox - Number of speeds
4
3
4
Clutch Type
Manual
Manual
Manual
Size, Dimensions, Aerodynamics and Weight
Body
Sedan
Num. of Doors
4
4
4
Num. of Seats
5
5
5
Wheelbase
279.5 cm / 110.04 inches
279.5 cm / 110.04 inches
279.5 cm / 110.04 inches
Length
486 cm / 191.34 inches
486 cm / 191.34 inches
486 cm / 191.34 inches
Width
180 cm / 70.87 inches
180 cm / 70.87 inches
180 cm / 70.87 inches
Height
143 cm / 56.3 inches
143 cm / 56.3 inches
143 cm / 56.3 inches
Front Axle
150.8 cm / 59.37 inches
Rear Axle
152.2 cm / 59.92 inches
Front Brakes - Disc dimensions
Vented Discs (280 mm / 11.02 inches)
Vented Discs (270 mm / 10.63 inches)
Vented Discs (280 mm / 11.02 inches)
Rear Brakes - Disc dimensions
Discs (280 mm / 11.02 inches)
Discs (280 mm / 11.02 inches)
Discs (284 mm / 11.18 inches)
Front Tyres - Rims dimensions
195/70 R14
195/70 R14
195/70 R14
Rear Tyres - Rims dimensions
195/70 R14
195/70 R14
195/70 R14
Front Wheels Width
6½
Rear Wheels Width
6½
Curb Weight
1580 kg / 3483 lbs
1530 kg / 3373 lbs
1460 kg / 3219 lbs
Weight/Power Output Ratio
8.59 Kg/hp
9 Kg/hp
9.73 Kg/hp
Trunk / Boot capacity
480 L / 17 cu-ft
480 L / 17 cu-ft
480 L / 17 cu-ft
Steering
Recirculating ball. PAS
Front Suspension
MacPherson struts coil springs and Anti-roll bar
MacPherson struts coil springs and Anti-roll bar
MacPherson struts coil springs and Anti-roll bar
Rear Suspension
Semi-trailing arms coil springs and Anti-roll bar
Semi-trailing arms coil springs and Anti-roll bar
Semi-trailing arms coil springs and Anti-roll bar
Top Speed
200 km/h / 124 Mph
192 km/h / 119 Mph
Acceleration 0 to 60 mph (0 to 96 Km/h)
9.40 s
Acceleration 0 to 100 km/h (0 to 62 mph)
9.6 s
10.1 s
Acceleration 0 to 1000m
30.9 s
Fuel Consumption (Economy), Emissions and Range
Fuel Consumption - Economy - Highway
14.8 L/100 km
19 MPG UK
16 MPG US
13.8 L/100 km
20 MPG UK
17 MPG US
Fuel Consumption - Economy - City
15.8 L/100 km
18 MPG UK
15 MPG US
15 L/100 km
19 MPG UK
16 MPG US
Fuel Tank Capacity
85 L
22.5 US gallons
18.7 UK gallons
85 L
22.5 US gallons
18.7 UK gallons
100 L
26.4 US gallons
22 UK gallons



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