Vehicle Overview
Key specifications and features at a glance
Q8 55 TFSI quattro
Overview
X5 xDrive40i
2018 - Present
Year
2018 - Present
2995
Engine
2998
250
Power
280
Diesel
Fuel
Diesel
Automatic
Transmission
Automatic
5
Seating
5
Detailed Specifications
Complete technical specifications comparison
Best comparable values are highlighted in green.
Q8 55 TFSI quattro
Specification
X5 xDrive40i
2995
Engine Capacity
2998
—
Engine Code
B58
V
Cylinder Configuration
Inline
6
Number of Cylinders
6
250
Power
280
500
Torque
540
250
Top Speed
250
AWD
Drive Type
AWD
9.2
Fuel Economy Combined
9.3
—
Emission Standard
Euro 6
285 / 45 R21
Tyre Size
275 / 45R20 front, 305 / 40R20 rear
21
Wheel Size
20
5
Number of Doors
5
5
Seating Capacity
5
Ventilated disc
Front Brakes
Ventilated disc
Ventilated disc
Rear Brakes
Ventilated disc
Multi-link adaptive air suspension
Front Suspension
Double wishbone
Multi-link adaptive air suspension
Rear Suspension
Multi-link
Electromechanical power steering
Steering Type
Electric power-assisted rack and pinion
8
Number of Airbags
8
3500
Towing Capacity
2700
—
Turning Circle
12.6
Dimensions & Weight
Physical specifications and measurements
Best comparable values are highlighted in green.
Q8 55 TFSI quattro
Dimension
X5 xDrive40i
85
Fuel Tank Capacity
83
4992
Length
4935
1995
Width
2004
1705
Height
1765
2998
Wheelbase
2975
—
Ground Clearance
214
2175
Kerb Weight
2165
605
Boot Space
650
Features Comparison
Standard and optional equipment comparison
Safety
Q8 55 TFSI quattro
Feature
X5 xDrive40i
Adaptive Cruise Control
Autonomous Emergency Braking
Lane Departure Warning
Lane Keep Assist
Blind Spot Monitoring
Rear Cross Traffic Alert
Traffic Sign Recognition
Driver Attention Monitor
Front Parking Sensors
Rear Parking Sensors
360 Camera
Reverse Camera
Hill Start Assist
Tyre Pressure Monitoring System
Rear Occupant Alert
Comfort
Q8 55 TFSI quattro
Feature
X5 xDrive40i
Keyless Entry
NFC Keyless Entry
Push Button Start
Dual-Zone Climate Control
Tri-Zone Climate Control
Heated Front Seats
Ventilated Front Seats
Heated Steering Wheel
Power Tailgate
Remote Start
Power Driver Seat
Power Passenger Seat
Memory Seats
Auto Dimming Mirror
Rain Sensing Wipers
Adaptive Headlights
Interior Exterior
Q8 55 TFSI quattro
Feature
X5 xDrive40i
Leather Seats
Fabric Seats
Ambient Lighting
Sunroof
Panoramic Roof
LED Headlights
Matrix LED Headlights
Daytime Running Lights
Alloy Wheels
Roof Rails
Rear Privacy Glass
Power Folding Mirrors
Technology
Q8 55 TFSI quattro
Feature
X5 xDrive40i
Touchscreen Display
Digital Instrument Cluster
Apple CarPlay
Android Auto
Wireless Apple CarPlay
Wireless Android Auto
Wireless Phone Charging
Built-in Navigation
Premium Audio System
Head-Up Display
USB-C Ports
Bluetooth Connectivity
Voice Control
Connected Car App
Diesel Utility
Q8 55 TFSI quattro
Feature
X5 xDrive40i
Trailer Sway Control
Side Steps
Tow Bar Prep
Pros & Cons
Strengths and weaknesses of each vehicle
Audi Q8 55 TFSI quattro
Pros
- +Smooth 250 kW petrol V6
- +Quick 5.9-second acceleration
- +Excellent 3500 kg towing capacity
- +Refined adaptive air suspension
- +Spacious 605 litre boot
Cons
- −Higher fuel use than diesel
- −High purchase price
- −Large exterior dimensions
- −Heavy kerb weight
- −Only five seats
BMW X5 xDrive40i
Pros
- +Smooth six-cylinder performance
- +Strong 280 kW output
- +Large 650 litre boot
- +Useful 2700 kg towing capacity
- +Refined eight-speed automatic
Cons
- −Higher fuel use than xDrive30d
- −Premium petrol recommended
- −Large body for urban parking
- −Premium servicing costs
- −Options can raise the price
Which one should you buy?
Best for Performance: BMW X5 xDrive40i
System power around 280 kW supports a solid performance score.
Best for Value: BMW X5 xDrive40i
Boot space relative to list price contributes positively to the value score.
Our Recommendation
Choose Audi Q8 55 TFSI quattro if: You prioritise performance and responsive power.
Choose BMW X5 xDrive40i if: You prioritise performance and responsive power.
Bottom Line: BMW X5 xDrive40i leads on performance and BMW X5 xDrive40i leads on value.
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