BMW 750i Engine

BMW 750i Engine – Complete Guide

The BMW 7 series was somewhat behind the cars like Audi A8 and Mercedes S class. However, in 2020 the BMW came up with a new modification that is inspired by the BMW 8series sedan. The new modification in the BMW 7 series includes refined powertrains, a redesigned exterior, and new updated Technology. As the BMW 750i is one of the most expensive models in the BMW lineup. It is powered by a new and powerful 4.4litre V8 engine. The engine is capable of generating an immersive power of 445 horsepower at an rpm rate of 5,500. The BMW 750i engine is so powerful that the car can accelerate from zero to 60mph in about 5.2seconds. The BMW 750i can reach a maximum speed of about 155mph or 250km/hour. The car comes standard with rear-wheel drive. As being a flagship car of BMW the 750i has a six-speed automatic gearbox. Also, the 750i can accelerate from zero to 1000m in about 24.1seconds. Which is a very good pick-up speed in the sedan segment of this lineup. The BMW 750i has a combined fuel economy rate of 11.4litre/100km.

Table of Content-

  • Specification of BMW 750i engine
  • Fuel economy of BMW 750i Engine
  • Common problems with the BMW 750i engine
  • Conclusion

Specification of BMW 750i engine-     

The BMW 750i can reach a speed of 62mph from zero in just about 5.2seconds. The car is powered by a petrol engine. This beautiful and premium sedan can also reach a maximum speed of 250 Km/hour. Its Aerodynamic drag coefficient is about 0.31Cx. The BMW 750i is a luxury sedan with all the comfort features and the car has all the modern technology. These technologies include motion sensors to increase or decrease the volume, temperature, etc. The 750i is also one of the most loved and favored cars in the premium sedan market.

Engine type – Petrol engine

Number of cylinders – V8

Alignment of the engine – Longitudinal

Aspiration – Turbocharger and intercooler

Engine displacement – 268.2cu-in or 4395 cm3

Total number of valves – 36 Valve

Bore x strokes – 3.5 x 3.46 inches or 89 x 88.3mm

The ratio of compression – 10

Wheel drive – Rear wheel drive

Transmission or Gearbox – Six-speed automatic gearbox

Maximum output – 300 kW at rpm rate of 6400

The maximum amount of torque – 600Nm at rpm rate of 1750-4500

Fuel economy of BMW 750i Engine –

The BMW 750i has a combined fuel economy of 11.4litre per 100kilometer. Also, the combined fuel economy of a car in the UK is 25mpg and in the USA the combined fuel economy of the car is 21mpg. The fuel consumption of a car on the highway is about 8.5litre/100kilometer. That is 33mpg in the UK and 28mpg in the USA. The fuel economy of the car in cities is about 16.4litre per 100kilometer. That is, the fuel economy of the car in the UK is 17mpg and fuel economy in the USA is about 14mpg. The range of the 750i in the case of a full tank is about 719km or 447miles. Also, the car has a high carbon emission rate of about 226gram per kilometer.   

Common problems with the BMW 750i engine-

1- Excess Oil Consumption

The BMW 750i is well known for its thirsty engine. However, the problem comes out directly from its engine design. As the turbos are present in between the valley of the engine but this part of the engine is very hot and leads to burning more fuel. The problem may even cause the gaskets to dry and result in a leak. 

2- The fuel injector failure problem 

This is also a common problem in the BMW 750i engine. The fuel injector may start to show symptoms of failure very early after purchasing the car. Also if you are thinking of buying this car then keep in mind that fuel injectors are not very cheap. The single injector may cost you around $200 and does not include the labor cost. The common symptoms of your injector fail are rough Idles, Bad acceleration, engine misfire, must check engine light, and residue present in the bumper due to unburnt fuel. If your vehicle is showing any of these symptoms then there may be really a problem with the fuel injector.

3- Timing Belt problem  

The timing belt stretches with time and can damage the valve train. Which will definitely reduce the performance of the car. The stretching of the belt may even cause the cylinder valve to bend. To fix this damaged part can be a very costly part of the repair. Also, rough idle rides and your engine light can be very useful tools to predict the early sign of damage. However, ignoring these signs may result in engine failure as the Timing belt problem is a silent killer to the engine. Also, the BMW has identified this issue and will pay the repair cost of the engine. In case the Timing belt has completely damage.

4- Fast battery drainage  

The battery of the car is not technically part of the engine. However, the batteries are required to keep running the electronic system even when the car is off. Also cooling the turbos that are just present in between the valley of the engine. The 750i is also known for its batteries that drain very quickly. Also, the BMW says to change your car batteries after every other oil change.


The BMW 7 Series is a wonderful car that is capable of achieving a speed of 250km/hour. The combined fuel economy of the car is about 11.4L/100km. The car has a curb weight of about 4453lbs. The 750i gets power from a twin-turbocharged V8 petrol engine. It is also capable of generating a power of 300Kw at an rpm rate of 6400. It can also generate maximum torque of about 600NM at an rpm rate of 1750 to 4500. The BMW 750i is a flagship of BMW and came into the market in the year 2008.

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