BMW 725tds (E38)

BMW 7 series 1998 2.5 diesel description

Sedan BMW 725tds has been produced from September, 1998 to May, 2000. It has six-cylinder diesel engine with displacement of 2.5 litres, which produces power of 143 horsepower on 4600 rpm and torque 280 Nm (Newton metres) on 2200 revolutions per minute.

This 6-cylinder 12-valve engine camshaft is driven by chain (What is an engine chain and belt? ). Engine has precombustion chamber fuel system and MHI TD0413T4 turbine. Engine versions compliant with Euro 2 and Euro 3 emission standards available. Average engine life expectancy (mileage before serious repairs are needed) is from 270 000 to 450 000 kilometres. It is important to remember that engine life is highly dependent on regular maintenance and the quality of the oils and fuels used.
More engine specs 
This BMW 7 series 2.5 engine oil type is 5W-40 and oil capacity is 7 litres.

BMW 725tds has classical rear wheel drive (RWD) and automatic gearbox with 5 gears.
BMW 725tds accelerates to speed 100 kilometres per hour in 12 seconds. The maximum speed of this car is 202 km/h.

The fuel consumption of this BMW 725tds in combined mode (combining urban and highway driving) is 9.5 litres per 100km (10.5 km/l), fuel consumption in city - 13 l/100km, highway fuel economy - 7.3 l/100km. Fuel tank capacity is 85 litres or 22.46 gallons, which gives a mileage up to 880 kilometers without refueling in urban cycle and even up to 1160 kilometers on highway.

With the same engine there is also BMW 7 series version with manual gearbox (BMW 725tds MT) available, which manufacturer's fuel consumption is lower by 1.3 litres per 100 km or 14 % - 8.2 litres per 100 km.
BMW 7 series 1998

BMW 725tds technical data

Model: BMW 725tds
Body style: Sedan
Production period: 1998. September ... 2000. May 
Engine: 2497 cm3 Diesel, 6 cylinders CO2 emissions: 252 g/km
Power: 143 HP ON 4600 RPM Torque: 280 NM ON 2200 RPM
Gearbox: Automatic gearbox (5 gears) Drive type: Rear wheel drive (RWD)
Maximum speed: 202 km/h Acceleration 0-100 km/h: 12.0 seconds
Fuel consumption (l/100km): 9.5 (combined) 13.0 (urban) 7.3 (highway)
Fuel tank capacity: 85 litres (22.5 gallons)
Car dimensions: 4.98m (length) 1.86m (width) 1.44m (height)
Turning diameter: 12 meters
Trunk capacity: 500 litres
Gross weight: 2300 kg

BMW 725tds engine M51D25TU OL

Engine reliability:

Overall, this engine can last around 270,000 to 450,000 km if properly maintained, using the correct quality oil and fuel, and carrying out regular checks and maintenance.
The engine has hydraulic valve tappets (lifters), which provide quieter operation and do not require periodic adjustment, but are more complex in design and can cause serious engine damage in the event of failure.
Engine displacement 2497 cm3
Number of cylinders 6
Bore (cylinder diameter) 80 mm
Stroke length (piston move) 82.8 mm
Compression ratio 22 : 1
Camshaft drive Timing chain

Chain motors are considered more reliable, chain replacement usually is required less often than a timing belt, but they are often louder and vibrate more.

Fuel system Precombustion chamber
BMW 725tds oil type 5W-40
Oil capacity 7 litres (7.4 quarts)
Coolant capacity 9.8 litres (10.4 quarts)
Power 143 HP ON 4600 RPM
Torque 280 NM ON 2200 RPM
Start of production (year) 1991
Duration of production 10 years
Engine also used on BMW 5 sērija

All BMW 7 series sedan [1998 - 2001] modifications

Modification Engine Power Consumption Gearbox
BMW 725tds Sep 1998 — Mai 2000

Most fuel efficient diesel version

2.5 Diesel 143 HP 8.2 l/100km Manual (5)
BMW 725tds Sep 1998 — Mai 2000 2.5 Diesel 143 HP 9.5 l/100km Automatic (5)
BMW 728i Sep 1998 — Nov 2001

Most fuel efficient petrol version

2.8 Petrol 193 HP 10.0 l/100km Manual (5)
BMW 728i Sep 1998 — Nov 2001 2.8 Petrol 193 HP 11.0 l/100km Automatic (5)
BMW 728iL Sep 1998 — Nov 2001 2.8 Petrol 193 HP 11.0 l/100km Automatic (5)
BMW 730d Sep 1998 — Nov 2001

Most fuel efficient diesel version by real consumption

2.9 Diesel 184 HP 8.7 l/100km Automatic (5)
BMW 730d Jan 2000 — Dec 2001 2.9 Diesel 193 HP 8.8 l/100km Automatic (5)
BMW 735i Sep 1998 — Nov 2001 3.5 Petrol 238 HP 12.0 l/100km Automatic (5)
BMW 735iL Sep 1998 — Nov 2001 3.5 Petrol 238 HP 12.0 l/100km Automatic (5)
BMW 740d Apr 1999 — Nov 2001

Most powerfull diesel version (238 HP)

3.9 Diesel 238 HP 9.8 l/100km Automatic (5)
BMW 740i Sep 1998 — Nov 2001 4.4 Petrol 286 HP 12.0 l/100km Automatic (5)
BMW 740iL Sep 1998 — Nov 2001 4.4 Petrol 286 HP 13.0 l/100km Automatic (5)
BMW L7 High-Line Apr 1998 — Nov 2001 5.4 Petrol 326 HP 15.0 l/100km Automatic (5)
BMW 750i Sep 1998 — Nov 2001 5.4 Petrol 326 HP 14.0 l/100km Automatic (5)
BMW 750iL Sep 1998 — Nov 2001

Most dynamic version - 100 km/h in 6.6 seconds

5.4 Petrol 326 HP 14.0 l/100km Automatic (5)
BMW 7 series 1998 reviews
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