BMW 850i 2018-present

BMW 850i 2018-present Drivetrain Specifications

Detailed technical specifications and maintenance guidelines for the drivetrain system of the 2018-Present BMW 850I, including engine, transmission, differential, and driveshaft components.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the drivetrain specifications for the 2018-Present BMW 850i, including key features, measurements, and technical details

How to Use

Use the search function to locate specific drivetrain components or specifications by entering keywords such as 'transmission', 'differential', or 'torque'.

Navigate through the drivetrain documentation by selecting the desired section from the table of contents or using the sidebar menu for quick access to subsections.

Key Specifications

Engine Displacement

4.4 L

Maximum Power

523 hp (390 kW)

Peak Torque

553 lb-ft (750 Nm)

Transmission Type

8-speed automatic

Drivetrain

xDrive AWD

Available Specifications

Engine and Transmission

Details about the engine and transmission system, including specifications and performance metrics

Engine Specifications

4.4L TwinPower Turbo V8 engine
Maximum power output: 523 hp (390 kW) at 5500-6000 rpm
Peak torque: 553 lb-ft (750 Nm) at 1800-4600 rpm
Direct injection and Valvetronic variable valve timing
Compression ratio: 10.5:1

Transmission System

8-speed Steptronic Sport automatic transmission
Adaptive shift dynamics with manual mode
Integrated launch control system
Gear ratios: 1st - 5.000, 2nd - 3.200, 3rd - 2.143, 4th - 1.720, 5th - 1.314, 6th - 1.000, 7th - 0.822, 8th - 0.640
Final drive ratio: 2.813

Note: The transmission features a torque converter with lock-up clutch for improved efficiency.

Drivetrain Configuration

Information about the drivetrain layout and components, including the all-wheel-drive system

All-Wheel-Drive System

xDrive intelligent all-wheel-drive system
Dynamic torque distribution between front and rear axles
Default torque split: 40% front, 60% rear
Integrated DSC (Dynamic Stability Control) for enhanced traction
Active M Differential for optimized power distribution

Driveshaft and Axles

Carbon-fiber reinforced driveshaft for reduced weight
Front axle: Double-wishbone suspension with anti-roll bar
Rear axle: Integral V multi-link suspension with anti-roll bar
Axle ratio: 3.15
Wheelbase: 111.1 inches (2822 mm)

Note: The carbon-fiber driveshaft contributes to improved handling and reduced rotational mass.

Performance and Efficiency

Technical details about the drivetrain's performance capabilities and fuel efficiency

Acceleration and Top Speed

0-60 mph acceleration: 3.7 seconds
Top speed: 155 mph (250 km/h) (electronically limited)
Optional M Driver's Package increases top speed to 190 mph (306 km/h)
Braking distance (60-0 mph): 110 feet (33.5 meters)
Drag coefficient: 0.29 Cd

Fuel Efficiency

EPA-estimated fuel economy: 18 mpg city, 25 mpg highway
Combined fuel economy: 20 mpg
Fuel tank capacity: 18.0 gallons (68 liters)
CO2 emissions: 292 g/km
Start-stop function for reduced fuel consumption

Note: Fuel efficiency may vary based on driving conditions and vehicle configuration.

Search Specifications

Search by specification name, value, or description

Component Specifications

Engine

Type: V8 TwinPower Turbo

Displacement: 4395 cc

Power Output: 523 hp @ 5500-6000 rpm

Torque: 553 lb-ft @ 1800-4600 rpm

Compression Ratio: 10.5:1

Fuel System: Direct Injection

Part Number: 11 00 8 609 123

Transmission

Type: 8-speed Steptronic Sport Automatic

Gear Ratios: 1st: 5.000:1
2nd: 3.200:1
3rd: 2.143:1
4th: 1.720:1
5th: 1.313:1
6th: 1.000:1
7th: 0.823:1
8th: 0.640:1
Reverse: 3.457:1

Part Number: 24 00 8 609 456

Fluid Capacity: 9.5 liters

Fluid Type: BMW ATF 3+

Transfer Case

Type: All-Wheel Drive (xDrive)

Torque Split: 40:60 (front:rear)

Part Number: 27 10 8 609 789

Fluid Capacity: 1.2 liters

Fluid Type: BMW TF 0870

Differential

Front: Type: Open Differential
Gear Ratio: 3.15:1
Part Number: 33 10 8 609 321
Fluid Capacity: 1.0 liter
Fluid Type: BMW SAF-XO

Rear: Type: Limited Slip Differential
Gear Ratio: 2.81:1
Part Number: 33 10 8 609 322
Fluid Capacity: 1.2 liters
Fluid Type: BMW SAF-XO

Driveshaft

Material: Carbon Fiber Reinforced Polymer

Length: 1.5 meters

Part Number: 26 10 8 609 654

Torque Rating: 600 Nm

Operational Speed Limit: 8000 rpm

Axles

Front: Type: Independent Double Wishbone
Part Number: 31 10 8 609 987
Cv Joint Type: Rzeppa
Torque Rating: 550 Nm

Rear: Type: Independent Multi-Link
Part Number: 31 10 8 609 988
Cv Joint Type: Rzeppa
Torque Rating: 550 Nm

Clutch

Type: Hydraulic Dual-Clutch

Part Number: 21 20 8 609 555

Fluid Capacity: 0.5 liters

Fluid Type: BMW DOT 4

Operational Temperature Range: -40°C to 120°C

Propeller Shaft

Material: Aluminum Alloy

Length: 1.2 meters

Part Number: 26 10 8 609 655

Torque Rating: 700 Nm

Operational Speed Limit: 7500 rpm

Cooling System

Radiator Type: Cross-Flow

Coolant Capacity: 12.5 liters

Coolant Type: BMW Antifreeze/Coolant

Part Number: 17 11 8 609 777

Operational Temperature Range: -30°C to 110°C

Lubrication System

Oil Capacity: 8.5 liters

Oil Type: BMW TwinPower Turbo 0W-30

Oil Filter Part Number: 11 42 8 609 888

Oil Change interval: 10000 miles or 12 months

Operational Pressure Range: 2.5-4.5 bar

Service Information Service

Detailed service requirements and schedules for the drivetrain system

10000

Engine oil and filter change
Transmission fluid check
Differential fluid check
Coolant level check
Driveshaft and propeller shaft inspection

Use only BMW-approved fluids and parts

30000

Transmission fluid replacement
Differential fluid replacement
Transfer case fluid replacement
Clutch fluid replacement
Coolant replacement

Inspect all drivetrain components for wear and damage

60000

Driveshaft and propeller shaft replacement if necessary
Axle CV joint inspection and lubrication
Clutch system inspection
Cooling system flush
Lubrication system flush

Perform detailed diagnostic checks on all drivetrain components

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of drivetrain does the 2018-Present BMW 850i use?

The 2018-Present BMW 850i features an xDrive all-wheel-drive (AWD) system. This system is paired with an 8-speed Steptronic Sport automatic transmission, providing optimal traction and performance in various driving conditions.

What is the torque output of the drivetrain in the BMW 850i?

The BMW 850i's drivetrain delivers a maximum torque of 553 lb-ft (750 Nm) at 1,800-4,600 rpm, ensuring strong acceleration and responsive performance across a wide range of engine speeds.

How does the xDrive system enhance drivetrain performance?

The xDrive system in the BMW 850i dynamically distributes torque between the front and rear axles, with a default 40:60 front-to-rear split. It continuously adjusts based on driving conditions, improving stability, traction, and handling, especially in adverse weather or high-performance driving scenarios.

What is the recommended service interval for the drivetrain components?

BMW recommends inspecting the drivetrain components, including the transmission and transfer case, every 30,000 miles (48,000 km) or as specified in the vehicle's service schedule. Regular maintenance includes fluid changes, seal inspections, and software updates to ensure optimal performance.

Can the drivetrain be modified for higher performance?

While modifications such as ECU tuning or aftermarket components can enhance performance, they may void the vehicle's warranty and compromise the integrity of the drivetrain. Always consult with a BMW-certified technician before making any modifications.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

BMW xDrive System Overview

Coming Soon

Detailed technical guide on the xDrive all-wheel-drive system, including its operation, benefits, and maintenance requirements.

8-Speed Steptronic Transmission Manual

Coming Soon

Comprehensive manual covering the operation, maintenance, and troubleshooting of the 8-speed Steptronic Sport automatic transmission.

Drivetrain Maintenance Schedule

Coming Soon

Official BMW maintenance schedule for drivetrain components, including fluid changes, inspections, and software updates.

BMW Genuine Parts Catalog

Coming Soon

Access the official catalog for genuine BMW drivetrain parts, ensuring compatibility and optimal performance.

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