BMW 850i

BMW 8 series 1989 5.0 petrol description

Coupe BMW 850i has been produced from October, 1989 to October, 1992. It has 12-cylinder petrol engine with displacement of 5.0 litres, which produces power of 300 horsepower on 5200 rpm and torque 450 Nm (Newton metres) on 4100 revolutions per minute.

This 12-cylinder 24-valve engine camshaft is driven by chain (What is an engine chain and belt? ). Engine has fuel injection system, it has no turbine. The engine meets the Euro 2 emissions standard. Approximate engine life expectancy (mileage until serious repairs are required) for this engine is between 300 000 and 510 000 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 8 series 5.0 engine oil type is 5W-40 and oil capacity is 7.5 litres.

BMW 850i has classical rear wheel drive (RWD) and automatic gearbox with 4 gears.
BMW 850i accelerates to speed 100 kilometres per hour in 7.4 seconds. The maximum speed of this car is 250 km/h.

In combined cycle (city and motorway), the BMW 850i fuel consumption is 13 litres per 100km (7.7 km/l). Fuel tank capacity is 90 litres or 23.78 gallons, which gives a mileage up to 680 kilometers without refueling in urban cycle.
According to user reviews, this BMW real everyday fuel consumption is 14.9 litres per 100 km, which is 15% more than the manufacturer's stated. More - Real BMW 8 series fuel consumption.

With the same engine there are also two other BMW 8 series versions - with manual gearbox (BMW 850i MT), and with manual gearbox (BMW 850 Ci MT) available:
  • BMW 850i MT is more dynamic - it reaches 100 km/h 0.6 seconds faster (in 6.8 seconds), but manufacturer's fuel consumption is similar - 13.0 litres per 100 km, whereas users reported real fuel consumption is lower by 0.5 litres per 100 km or 3 % - 14.4 litres per 100 km
  • BMW 850 Ci MT is more dynamic - it reaches 100 km/h 0.6 seconds faster (in 6.8 seconds)
BMW 8 series 1989

BMW 850i technical data

Model: BMW 850i
Body style: Coupe
Production period: 1989. October ... 1992. October 
Engine: 4998 cm3 Petrol, 12 cylinders CO2 emissions: no data
Power: 300 HP ON 5200 RPM Torque: 450 NM ON 4100 RPM
Gearbox: Automatic gearbox (4 gears) Drive type: Rear wheel drive (RWD)
Top speed: 250 km/h Acceleration 0-100 km/h: 7.4 seconds
Fuel consumption (l/100km): 13.0 (combined)
Real fuel consumption: 14.9 l/100km (15.8 MPG) by user reviews from various sources
Fuel tank capacity: 90 litres (23.8 gallons)
Car dimensions: 4.70m (length) 1.86m (width) 1.34m (height)
Turning diameter: 12 meters
Trunk capacity: 320 litres
Gross weight: 2190 kg

BMW 850i engine M70B50

Engine reliability:

Overall, this engine can last around 300,000 to 510,000 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 4998 cm3
Number of cylinders 12
Bore (cylinder diameter) 84 mm
Stroke length (piston move) 75 mm
Compression ratio 8.8 : 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 Injection
BMW 850i oil type 5W-40
Oil capacity 7.5 litres (7.9 quarts)
Power 300 HP ON 5200 RPM
Torque 450 NM ON 4100 RPM
Start of production (year) 1987
Duration of production 7 years

All BMW 8 series coupe [1989 - 1999] modifications

Modification Engine Power Consumption Gearbox
BMW 830i 3.0 Jan 1992 — Dec 1992 3.0 Diesel 218 HP - Manual (6)
BMW 840i 4.0 Jan 1993 — Dec 1996 4.0 Petrol 286 HP 12.8 l/100km Manual (6)
BMW 840 Ci Jan 1993 — Mar 1996

Most fuel efficient petrol version

4.0 Petrol 286 HP 11.0 l/100km Automatic (5)
BMW 840 Ci Mar 1996 — Jul 1999 4.4 Petrol 286 HP 13.0 l/100km Manual (6)
BMW 840 Ci Mar 1996 — Jul 1999 4.4 Petrol 286 HP 13.0 l/100km Automatic (5)
BMW 850i Oct 1989 — Oct 1992

Most fuel efficient petrol version by real consumption

5.0 Petrol 300 HP 13.0 l/100km Manual (6)
BMW 850 Ci Oct 1992 — Mar 1996 5.0 Petrol 300 HP 13.0 l/100km Manual (6)
BMW 850i Oct 1989 — Oct 1992 5.0 Petrol 300 HP 13.0 l/100km Automatic (4)
BMW 850 Ci Oct 1992 — Mar 1996 5.0 Petrol 300 HP 13.0 l/100km Automatic (4)
BMW 850 Ci Mar 1996 — Jul 1999 5.0 Petrol 300 HP 14.0 l/100km Automatic (5)
BMW 850Ci 5.4 Jan 1994 — Dec 1999 5.4 Petrol 326 HP 14.0 l/100km Automatic (5)
BMW 850 CSi Oct 1992 — Sep 1996

Most dynamic version - 100 km/h in 6 seconds

5.6 Petrol 381 HP 18.0 l/100km Manual (6)
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