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| Technical Specs of This Model |
| 1. |
728i 1979
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| 2. |
728i 1998
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| General Information |
| Make |
BMW |
| Model |
728i |
| Production Year |
1979 |
| Country |
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| Designer |
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| Production Number |
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| Model Code |
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| Model Family |
E23 |
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| Chassis and Dimensions |
| Chassis Type |
4/5S SAL |
| Number of Doors |
4 |
| Wheelbase |
2790 mm (109,8 in) |
| Front Track |
1500 mm (59,1 in) |
| Rear Track |
1520 mm (59,8 in) |
| Length |
4860 mm (191,3 in) |
| Width |
1800 mm (70,9 in) |
| Height |
1430 mm (56,3 in) |
| Ground Clearance |
|
| Length / Wheelbase Ratio |
1,74 |
| Weight |
1470 kg (3237,9 lb) |
| Weight Distribution (front/rear) |
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| Fuel Capacity |
100 litre (22 Imp gal , 26,4 US gal) |
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| Aerodynamics |
| Drag Coefficient |
0,42 |
| Frontal Area |
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| Cx |
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| Engine Specifications |
| Engine Manufacturer |
BMW |
| Engine Location |
Front |
| Engine Alignment |
Longitudinal |
| Engine Construction |
cast iron block & light alloy head |
| Coolant Type |
Water |
| Engine Type |
SOHC |
| Number of Cylinders and Placement |
S-6 |
| Valves per Cylinder |
2 (Total of 12 Pieces) |
| Engine Displacement |
2788 cc (170,13 cu in) |
| Bore |
86 mm (3,39 in) |
| Stroke |
80 mm (3,15 in) |
| Bore / Stroke Ratio |
1,08 |
| Unitary Capacity |
464,67 cc/cylinder (28,36 cu in/cylinder) |
| Number of Main Bearings |
7 |
| Compression Ratio |
9,3 : 1 |
| Fuel System Type |
Bo L-Jet fuel inj. |
| Aspiration Type |
Normal |
| Compressor Type |
- |
| Intercooler Type |
None |
| Catalytic Converter |
No |
| Maximum Engine Power |
181 HP (135 kW) |
| Maximum Engine Power rpm |
5800 d/d |
| Maximum Engine Torque |
240 N.m (177,1 lb.ft , 24,5 kg.m) |
| Maximum Engine Torque rpm |
4200 d/d |
| Engine Torque at Max. Engine Power rpm |
222,2 N.m (5800 d/d) |
| Power / Weight Ratio |
123,1 HP/ton (91,8 W/kg) |
| Power / Engine Displacement Ratio |
64,9 HP/litre (48,4 kW/litre) |
| CO2 Emissions |
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| Fuel Consumption |
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| Performance |
| 0 - 80 km/h |
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| 0 - 60 mph |
9,3 s |
| 0 - 100 km/h |
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| 0 - 160 km/h |
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| 80 - 120 km/h (in top gear) |
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| 0 - 400 m Acceleration |
16,6 s |
| 0 - 1000 m Acceleration |
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| Top Speed |
201 km/h (124,9 mph) |
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| Gearbox and Transmission |
| Transmission Type |
5M |
| Top Gear Ratio |
0,81 : 1 |
| Final Drive Ratio |
3,64 : 1 |
| Drive Wheels |
RWD (Rear Wheel Drive) |
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| Handling, Suspension Geometry and Brakes |
| Steering Type |
recirculating ball VPAS |
| Steering Turns (lock to lock) |
3,8 |
| Turning Circle Diameter |
11,4 m (37,4 ft) |
| Suspension (front) |
I.CS.ARB. |
| Suspension (rear) |
I.STA.CS. |
| Brakes (front/rear) |
VeDi/Di-S |
| Brake Disc Diameter (front) |
280 mm |
| Brake Disc Diameter (rear) |
280 mm |
| Wheels (front) |
6 |
| Wheels (rear) |
6 |
| Tyres (front) |
195/70 HR 14 |
| Tyres (rear) |
195/70 HR 14 |
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