BMW 6 series 1976 3.5 petrol description
Coupe BMW 635 CSi has been produced from July, 1978 to August, 1982. It has six-cylinder petrol engine with displacement of 3.5 litres, which produces power of 218 horsepower on 5200 rpm - this is the most powerfull BMW 6 sērija 1976 - 1982 version and torque 310 Nm (Newton metres) on 4000 revolutions per minute.
This 6-cylinder 12-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 1 emissions standard. Approximate engine life expectancy (mileage until serious repairs are required) for this engine is between 320 000 and 540 000 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 6 series 3.5 engine oil type is 5W-30 and oil capacity is 5.75 litres.
BMW 635 CSi has classical rear wheel drive (RWD) and manual gearbox with 5 gears.
BMW 635 CSi accelerates to speed 100 kilometres per hour in 7.6 seconds. The maximum speed of this car is 222 km/h.
In combined cycle (city and motorway), the BMW 635 CSi fuel consumption is 13 litres per 100km (7.7 km/l) - this is one of most fuel efficient BMW 6 sērija 1976 - 1982 versions. Fuel tank capacity is 70 litres or 18.49 gallons, which gives a mileage up to 520 kilometers without refueling in urban cycle.
According to user reviews, this BMW real everyday fuel consumption is 14.1 litres per 100 km, which is 8% more than the manufacturer's stated. More - Real BMW 6 series fuel consumption.

BMW 635 CSi technical data
Model: | BMW 635 CSi | ||
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Body style: | Coupe | ||
Production period: | 1978. July ... 1982. August | ||
Engine: | 3453 cm3 Petrol, 6 cylinders | CO2 emissions: | no data |
Power: | 218 HP ON 5200 RPM | Torque: | 310 NM ON 4000 RPM |
Gearbox: | Manual gearbox (5 gears) | Drive type: | Rear wheel drive (RWD) |
Top speed: | 222 km/h | Acceleration 0-100 km/h: | 7.6 seconds |
Fuel consumption (l/100km): | 13.0 (combined) | ||
Real fuel consumption: | 14.1 l/100km (16.7 MPG) by user reviews from various sources | ||
Fuel tank capacity: | 70 litres (18.5 gallons) | ||
Car dimensions: | 4.76m (length) 1.72m (width) 1.36m (height) | ||
Turning diameter: | 11 meters | ||
Trunk capacity: | 413 litres | ||
Gross weight: | 1850 kg |
BMW 635 CSi engine M30B35
Engine reliability:
Overall, this engine can last around 320,000 to 540,000 km if properly maintained, using the correct quality oil and fuel, and carrying out regular checks and maintenance.Engine displacement | 3453 cm3 |
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Number of cylinders | 6 |
Bore (cylinder diameter) | 93.4 mm |
Stroke length (piston move) | 84 mm |
Compression ratio | 9 : 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 635 CSi oil type | 5W-30 |
Oil capacity | 5.75 litres (6.1 quarts) |
Power | 218 HP ON 5200 RPM |
Torque | 310 NM ON 4000 RPM |
Start of production (year) | 1968 |
Duration of production | 24 years |
Engine also used on | BMW 5 sērija |
All BMW 6 series coupe [1976 - 1982] modifications
Modification | Engine | Power | Consumption | Gearbox |
---|---|---|---|---|
BMW 628 CSi Oct 1979 — Aug 1982 | 2.8 Petrol | 184 HP | 12.0 l/100km | Manual (4) |
BMW 628 CSi Oct 1979 — Aug 1982 | 2.8 Petrol | 184 HP | 12.0 l/100km | Automatic |
BMW 630 CS
Jan 1976 — Dec 1979 Most fuel efficient version |
3.0 Petrol | 185 HP | 11.4 l/100km | Manual (4) |
BMW 630 CS Jan 1976 — Dec 1979 | 3.0 Petrol | 185 HP | 12.4 l/100km | Automatic |
BMW 633 CSi Jul 1976 — Aug 1982 | 3.2 Petrol | 197 HP | 12.0 l/100km | Manual (4) |
BMW 633 CSi Jul 1976 — Aug 1982 | 3.2 Petrol | 197 HP | 12.0 l/100km | Automatic |
BMW 635 CSi
Jul 1978 — Aug 1982 Most dynamic version - 100 km/h in 7.6 seconds |
3.5 Petrol | 218 HP | 13.0 l/100km | Manual (5) |
BMW 635 CSi
Jul 1978 — Aug 1982 Most powerfull version (218 HP) |
3.5 Petrol | 218 HP | 12.0 l/100km | Automatic |