A proper head-to-head in South Africa — compare price, performance,
fuel economy or electric range, safety and the details that shape long-term ownership.
BMW 4 Series Gran Coupé vs Toyota Quantum Bus: the short answer
4 Series Gran Coupé holds a noticeable catalogue-index lead over Quantum Bus.
Quantum Bus starts ZAR 101,500 cheaper4 Series Gran Coupé from ZAR 996,500 · Quantum Bus from ZAR 895,000
Five key differences
Exact selected derivatives
Swipe sideways to compare every column
Specification
4 Series Gran Coupé
Quantum Bus
Maximum Power
4 Series Gran Coupé285 kW @ 5800-6500 rpm
Quantum Bus75 kW
Maximum Torque
4 Series Gran Coupé500 Nm @ 1800-5000 rpm
Quantum Bus260 Nm
Engine Size
4 Series Gran Coupé2998 cc
Quantum Bus2494 cc
Combined Fuel Economy
4 Series Gran Coupé12.5 km/l
Quantum Bus11.2 km/l
Ground Clearance
4 Series Gran Coupé140 mm
Quantum Bus175 mm
Strongest published figure in that row; no road-test winner is implied.
Independent editorial assessment
Hagalu editorial ratings
When a variant is selected, its rating out of five applies only to that exact derivative; a model-range review is not inherited. Editorial ratings are separate from the Specification Evidence Index out of 100 and are not customer ratings.
BMW 4 Series Gran Coupé
M440i xDrive Gran Coupé
Hagalu editorial rating
4.0/5★★★★★★★★★★
Desk research · Exact variant
Hagalu Editorial Team ·
Editorial assessment, not a customer rating. Not road-tested for this review.
Not yet rated means a complete review is not published; it does not mean the vehicle scored zero. Read the rating methodology.
What Each Car Gets Right (and Wrong)
Specification evidence leader
4 Series Gran Coupé
Strengths
More powerful engine output
Better fuel efficiency
Stronger listed safety equipment
Weak Spots
Lower published practicality figures
Best suited to:Published PerformancePublished Efficiency
Quantum Bus
Strengths
Stronger published practicality figures
Weak Spots
Less powerful engine setup
Lower fuel efficiency
Fewer listed safety features
Best suited to:Published Practicality
Which One's Right for You?
4 Series Gran Coupé
Buyers prioritising the stronger published powertrain figures
Buyers prioritising the lower published fuel or energy use
Buyers prioritising the more complete listed safety equipment
Quantum Bus
Buyers prioritising the stronger published space and capacity figures
Full Specs, Side by Side
Open a category, then swipe sideways to compare every column
Spec
4 Series Gran Coupé
Quantum Bus
Model Introduced Year
2021
Current local generation year not confirmed
Generation
G26 four-door Gran Coupé with frameless-door styling and a rear liftback.
Current South African Quantum Bus listing; generation notes should be kept tied to the local model year and confirmed derivative data.
Facelift History
Current updated G26-generation BMW 4 Series Gran Coupé offered in South Africa; exact equipment follows derivative and production build.
Model-year updates can affect trim, wheels, screens, safety equipment and colours. Use the latest South African price list when checking a specific vehicle.
Facelift Launched Since
Original current-generation version
Original current-generation version
Facelift Version Ending
Current
Current
Body Style
Sedan
Van
Model Year
2026
2026
Production Status
active
active
Segment
Premium Sedan
Van
Vehicle Type
Car
Van
Color Note
-
Colour availability changes by model year, production batch and dealer stock, check the current colour selector before ordering.
Dealer Stock Note
-
Base grade in the South Africa lineup
Tare Mass Kg
-
2080 kg
Spec
4 Series Gran Coupé
Quantum Bus
Length
1 mm
5380 mm
Width
1 mm
1880 mm
Height
1 mm
2280 mm
Wheelbase
1 mm
3110 mm
Ground Clearance (Default)
140 mm
175 mm
Ground Clearance (With Full Seating Load)
125 mm
125 mm
Fuel Tank Capacity
50 l
70 l
Boot/Cargo Space
485 l
487 l
Kerb Weight
1543 kg
2080 kg
Gross Vehicle Weight (GVW)
2045 kg
3500 kg
Payload Capacity
460 kg
1420 kg
Towing Capacity
1600 kg
2000 kg
Seating Capacity
1 seats
14 seats
Number of Rows
2 rows
3 rows
Doors
4 doors
4 doors
Minimum Turning Radius
5.6 m
6.5 m
Front Headroom
998 mm
987 mm
Rear Headroom
943 mm
955 mm
Front Legroom
1044 mm
1042 mm
Rear Legroom
886 mm
882 mm
Spec
4 Series Gran Coupé
Quantum Bus
Engine
BMW turbocharged engine
2.5-litre Turbocharged Diesel
Engine Code
B48
Market-specific engine family
Fuel Type
Petrol
Diesel
Hybrid System
Not Applicable
Not Applicable
Engine Displacement
2998 cc
2494 cc
Cylinders
6
4
Cylinder Layout
Inline
Inline
Valves
16
16
Valves per Cylinder
4
4
Aspiration
Turbocharged
Turbocharged
Fuel System
Direct injection
Common Rail Direct Injection
Compression Ratio
10.5:1
10.5:1
Bore
82.0 mm
82.0 mm
Stroke
94.6 mm
94.6 mm
Maximum Power
285 kW @ 5800-6500 rpm
75 kW
Maximum Torque
500 Nm @ 1800-5000 rpm
260 Nm
Combined Power
Not Applicable
Not Applicable
Combined Torque
Not Applicable
Not Applicable
Motor Type
Not Applicable
Not Applicable
Number of Motors
Not Applicable
Not Applicable
Motor Location
Not Applicable
Not Applicable
Drive Type
AWD
RWD
Transmission
8-Speed Automatic
5-Speed Manual
Top Speed
250 km/h
150 km/h
0-100 km/h
4.7 sec
18.0 sec
Quarter Mile
12.2 sec
15.5 sec
Drive Modes
Eco, Comfort, Sport
Eco, Comfort, Sport
Launch Control
No
No
Rev Limiter
7000 rpm
4800 rpm
Power-to-Weight Ratio
100 kW/tonne
36.1 kW/tonne
Torque-to-Weight Ratio
220 Nm/tonne
125 Nm/tonne
Battery Capacity
Not Applicable
Not Applicable
Usable Battery Capacity
Not Applicable
Not Applicable
Battery Type
Not Applicable
Not Applicable
Battery Voltage
Not Applicable
Not Applicable
Electric Range
Not Applicable
Not Applicable
AC Charging Power
Not Applicable
Not Applicable
DC Charging Power
Not Applicable
Not Applicable
AC Charging Time
Not Applicable
Not Applicable
DC Charging Time
Not Applicable
Not Applicable
Regenerative Braking
Not Applicable
Not Applicable
Spec
4 Series Gran Coupé
Quantum Bus
Gearbox
8-Speed Automatic
5-Speed Manual
Drivetrain Layout
All-wheel drive
FR
LSD Available
Not Applicable
No
Transfer Case
Not Applicable
Not Applicable
Differential Lock
Not Applicable
Not Applicable
Paddle Shifters
Yes
No
Final Drive Ratio
Yes
Not Applicable
Number of Gears
8
5
Transmission Type
Automatic
Manual
Clutch Type
Yes
Not Applicable
Gear Shift Indicator
Yes
Not Applicable
Gear Shift Type
Automatic selector
5-Speed Manual
Drivetrain
AWD
RWD
4WD Engagement
Not Applicable
Not Applicable
4WD Hi Range
Not Applicable
Not Applicable
4WD Lo Range
Not Applicable
Not Applicable
4WD Selector
Not Applicable
Not Applicable
Automatic Shift Paddles
Yes
No
Front Differential Lock
Not Applicable
Not Applicable
Gearbox Type
Automatic
5-Speed Manual
Low Range Ratio
Not Applicable
Not Applicable
Low Range
Not Applicable
Not Applicable
Axle Layout
Yes
RWD
Rear Differential Lock
Not Applicable
Not Applicable
Transmission Speeds
8
5
Differential Type Front
-
Not Available
Differential Type Rear
-
Not Available
Transfer Case Guard
-
Not Available
Spec
4 Series Gran Coupé
Quantum Bus
Claimed Mileage
12.5 km/l
11.2 km/l
City Mileage
10.5 km/l
9.8 km/l
Highway Mileage
15.0 km/l
11.5 km/l
Fuel Tank Capacity
1 l
70 l
Emission Standard
Euro 6
Euro 4
AdBlue Tank Capacity
Not Applicable
Not Applicable
Auto Start Stop
Standard
Not Applicable
Real-world Mileage
12.5 km/l
11.2 km/l
Charging Port Type
Not Applicable
Not Applicable
Charging Type
Not Applicable
Not Applicable
Fuel Tank Litres
1
70
Combined Driving Range
Not Applicable
Not Applicable
Electric Consumption
Not Applicable
Not Applicable
Range Real World Highway
360 km
Not Applicable
Range Real World Mixed
420 km
Not Applicable
Spec
4 Series Gran Coupé
Quantum Bus
Airbags
6
2
ABS
Standard
Standard
Electronic Stability Control
Standard
Standard
Traction Control
Standard
Standard
Hill Descent Control
Yes
Not Available
Hill Start Assist
Standard
Not Available
Child Safety Lock
Standard
Standard
ISOFIX Mounts
Standard
Not Available
Brake Assist
Standard
Standard
Tyre Pressure Monitor
Standard
Not Available
Engine Immobiliser
Standard
Standard
Seatbelt Warning All Seats
Standard
Not Available
Front Parking Sensors
Yes
Not Available
AEB
Yes
Not Available
BA
Standard
Standard
Brake Override System
Yes
Not Available
Curtain Airbags
Yes
Not Available
Driver Airbag
Yes
2
EBD
Standard
Standard
Engine Immobiliser
Standard
Standard
Hill Hold
Standard
Not Available
Passenger Airbag
Yes
2
Rear Cross Traffic Alert
Yes
Not Available
Seatbelt Pretensioners
Yes
Not Available
Seatbelt Reminder
Standard
Not Available
Side Airbags
Yes
Not Available
Stability Control
Standard
Standard
TCS
Standard
Standard
Knee Airbag
Yes
Not Available
ABS EBD
Standard
Standard
Alarm System
-
Standard
Central Locking
-
Standard
Blind Spot Monitoring
-
Not Available
Anti Theft Alarm
-
Standard
Driver Front Passenger Airbags
-
2
Driver Passenger Airbags
-
2
ESC With Traction Control
-
Standard
Spec
4 Series Gran Coupé
Quantum Bus
Cruise Control
Yes
Not Available
Adaptive Cruise Control
Yes
Not Available
Lane Keep Assist
Yes
Not Available
Lane Departure Warning
Yes
Not Available
Blind Spot Monitoring
Yes
Not Available
Rear Cross Traffic Alert
Yes
Not Available
Parking Sensors
Yes
Not Available
Rear View Camera
Yes
Not Available
360 Degree Camera
Yes
Not Available
Autonomous Emergency Braking
Yes
Not Available
Driver Fatigue Alert
Yes
Not Available
Traffic Sign Recognition
Yes
Not Available
Auto Highbeam
Yes
Not Available
Auto Wipers
Yes
Not Available
Rear Parking Sensors
Yes
Not Available
Reverse Camera
Yes
Not Available
Adaptive Cruise Control
Yes
Not Available
Park Assist
Yes
Not Available
Around View Monitor
Yes
Not Available
Blind Spot Warning
Yes
Not Available
Forward Collision Warning
Yes
Not Available
Auto Lights
-
Not Available
EV Mode
-
Not Available
Emergency Braking
-
Not Available
Parking Distance Sensors
-
Not Available
Parking Sensor
-
Not Available
Pre-Collision System
-
Not Available
Rain Sensor Wipers
-
Not Available
Rear View Camera
-
Not Available
Reverse Camera Type
-
Not Available
Reversing Camera
-
Not Available
Surround View Camera
Yes
Not Available
Spec
4 Series Gran Coupé
Quantum Bus
Seat Material
Leather/Sensatec
Fabric
Heated Seats
Yes
Not Applicable
Ventilated Seats
Yes
Not Applicable
Ambient Lighting
Yes
Not Applicable
Steering Wheel Material
Yes
Not Applicable
60 40 Split Seat
Yes
Standard
Driver Seat Adjustment
Electric multi-way
Manual
Passenger Seat Adjustment
Electric multi-way
Manual
Seat Trim
Yes
Fabric
Seat Adjustment
-
Manual
Steering Type
-
Hydraulic
Steering Adjustment
-
Tilt
Folding Rear Seats
-
Standard
Front Armrest
-
Not Available
Front Shoulder Room
-
Not Applicable
Rear Shoulder Room
-
Not Applicable
Rear USB Ports
-
1
Instrument Cluster Type
-
Not Available
Interior Colour Options
-
3
Adjustable Driver Seat
-
Manual
Fabric Seats
-
Fabric
Armrest Front
-
Not Available
Driver Seat
-
Manual
Interior Courtesy Lamps
-
Cabin trim, seating material, screen layout and driver-assistance equipment vary by derivative. Compare the chosen Quantum Bus grade before assuming a feature is included.
Leather Accented Seat Trim
-
Fabric
Interior Colours
-
3
Seat Fold Type
-
Standard
Spec
4 Series Gran Coupé
Quantum Bus
Climate Control
Automatic climate control
Manual AC
Power Windows
Standard
Front Only
Keyless Entry
Yes
Not Available
Push Button Start
Yes
Not Available
Wireless Charging
Yes
Not Available
Sunroof
Panoramic
Not Available
Electric Tailgate
No
Not Available
Rain Sensing Wipers
Yes
Not Available
AC Type
Automatic climate control
Manual AC
Load Bed Length
-
Not Applicable
Load Bed Width
-
Not Applicable
Automatic Headlamps
-
Not Available
Boot Space Seats Folded
-
Not Applicable
Adaptive Dampers
-
Not Available
Climate Zones
-
Manual AC
Electric Folding Mirrors
-
Front Only
Engine Start Button Illumination
-
Not Available
Engine Start Stop
Yes
Not Available
Engine Start Stop Button
Yes
Not Available
Engine Warranty
-
5 Years / 150,000 km
Front Armrest
-
Not Available
Fuel Consumption Combined
-
8.9
Hill Start Assist
-
Not Available
Panoramic Roof
Panoramic
Not Available
Performance Data Logger
-
Not Available
Power Mirrors
-
Front Only
Push Button Start
Yes
Not Available
Rear Seat Split
-
Standard
Rear Wing
-
Not Available
Rev Matching
-
Not Available
Seat Type
-
Fabric
Spare Wheel
Tyre repair kit
Full-Size
Stabilizer Bar
-
Front
Telescopic Steering
-
Tilt
Tilt Steering
-
Tilt
Voice Command
-
Not Available
Voice Command Support
-
Not Available
Accelerator 0 100
-
18.0 sec
Air Conditioning
Automatic climate control
Manual AC
Battery Preconditioning
-
Not Available
Bed Extender
-
Not Available
Canopy Fitment
-
Not Available
Centre Console
-
Not Available
Common Rail Injection
-
Common Rail Direct Injection
Diff Lock
-
Not Available
Difflock
-
Not Available
Digital Speedometer
-
Not Available
Front Diff Lock
-
Not Available
Intelligent Battery System
-
Not Available
Intelligent Keyless Entry
-
Not Available
Lift Gate
-
Not Available
Load Bed Cover
-
Not Available
Load Bed Light
-
Not Available
Load Bed Steps
-
Not Available
Loadbox Depth Mm
-
Not Available
Loadbox Length Mm
-
Not Applicable
Loadbox Rope Hooks
-
Not Available
Loadbox Tiedown Brackets
-
Not Available
Loadbox Width Mm
-
Not Applicable
Manual Aircon
-
Manual AC
Mirror
-
Front Only
One Pedal Driving
-
Not Available
Passive Entry Start
-
Not Available
Powered Tailgate
-
Not Available
Rear Diff Lock
-
Not Available
Rear Electric Motor
-
Not Available
Regenerative Braking Levels
-
Not Available
Remote Central Locking
-
Standard
Roof Rack Compatibility
-
Not Available
Sonar
-
Not Available
Sound System
6
2
Source Model Column
-
quantum-bus
Sport Plus Mode
-
Not Available
Sports Bar
-
Not Available
Stabilizer Bar Front
-
Front
Steering Column Adjustment
-
Tilt
Surround View Monitor
Yes
Not Available
Tailgate Damper
-
Not Available
Tailgate Lock
-
Not Available
Tow Bar Type
-
Not Available
TPMS
Standard
Not Available
Trim Level
-
base
Unlocking
Yes
Not Available
Variant Role
-
Entry or fleet-access derivative
Vdc
-
Standard
Vehicle To Grid
-
Not Available
Vehicle To Load
-
Not Available
Walk Away Auto Door Lock
-
Not Available
Walk Away Lock
-
Not Available
Wireless Charger
Yes
Not Available
Spec
4 Series Gran Coupé
Quantum Bus
Infotainment System
Yes
6.8-inch Touchscreen
Apple CarPlay
Yes
Not Available
Android Auto
Yes
Not Available
Bluetooth Connectivity
Yes
Standard
Number of Speakers
6
2
Digital Instrument Cluster
12.3
Not Applicable
USB Ports
2
1
Infotainment Screen
14.9
6.8-inch Touchscreen
Touchscreen
14.9
6.8-inch Touchscreen
Navigation System
-
Not Available
Wireless Apple CarPlay
Yes
Not Available
Wireless Android Auto
Yes
Not Available
Voice Recognition
-
Not Available
Infotainment Screen Size
14.9
6.8-inch Touchscreen
Infotainment Display
-
6.8-inch Touchscreen
Rear Usb
-
1
Audio Speakers
6
2
Audio System
-
2
Display Audio
-
6.8-inch Touchscreen
Front Rear USB Charge Ports
-
1
Multi Information Display
-
Not Available
Connected Services
-
Standard
Voice Control
-
Not Available
Smartphone Connectivity
-
Not Available
Spec
4 Series Gran Coupé
Quantum Bus
LED Headlamps
Yes
Not Available
Daytime Running Lamps
Standard
Not Available
Fog Lamps
Yes
Not Available
Roof Rails
Yes
Not Available
Exterior Colour Options
Multiple manufacturer colours
3
Headlights
Yes
Not Available
Panoramic Sunroof
Yes
Not Available
Alloy Wheel Design
-
Not Available
Chrome Exterior Finish
-
Not Available
Rear Spoiler
-
Not Available
Roof Type
-
Not Available
Body Type
-
Van
DRL
Standard
Not Available
Fog Lights
-
Not Available
Front Fog Lights
-
Not Available
Led Headlights
Yes
Not Available
Auto Headlights
-
Not Available
Automatic Headlamps
-
Not Available
Daytime Running Lights
Standard
Not Available
Electric Blind Sunroof
-
Not Available
Exterior Colour Options
-
3
Exterior Mirror Electric
-
Front Only
Front Fog Lamps
Yes
Not Available
Headlamp Levelling
-
Not Available
Headlamps
Yes
Not Available
Headlight Type
Yes
Not Available
Load Bed Liner
-
Not Available
Active Exhaust
-
Not Available
Rear Spoiler
-
Not Available
Spec
4 Series Gran Coupé
Quantum Bus
Approach Angle
Not Applicable
Not Available
Departure Angle
Not Applicable
Not Available
Wading Depth
Not Applicable
Not Available
Terrain Modes
Not Applicable
Not Available
Locking Differential
Not Applicable
Not Applicable
4WD System Type
All-wheel drive
Not Applicable
Breakover Angle
Not Applicable
Not Available
Hill Descent Control
Yes
Not Available
Energy Recovery Display
-
Not Available
Front Skid Plate Guard
-
Not Available
Ground Clearance Max
-
175 mm
Ground Clearance Min
-
175 mm
Off Road Descent Control
-
Not Available
Off Road Traction Assist
-
Not Available
Crawl Control
-
Not Available
Rear Skid Plate Guard
-
Not Available
Skid Plates Fuel Tank
-
Not Available
Skid Plates Transfer Case
-
Not Available
Terrain Mode Mud
-
Not Available
Terrain Mode Normal
-
Not Available
Terrain Mode Rock
-
Not Available
Terrain Mode Sand
-
Not Available
Terrain Mode Snow
-
Not Available
Terrain Response System
-
Not Available
Underbody Camera
-
Not Available
Spec
4 Series Gran Coupé
Quantum Bus
Tyre Size
225/50 R18
195/75 R16C
Front Brake Type
Ventilated disc
Disc
Rear Brake Type
Disc
Drum
Spare Wheel Type
Tyre repair kit
Full-Size
Wheel Rim Size
20
Not Available
Handbrake Type
Electronic
Not Applicable
Wheel Type
-
Not Available
Brake Type Front
-
Disc
Brake Type Rear
-
Drum
Spare Tyre
Tyre repair kit
Full-Size
Tyre Type
-
195/75 R16C
Autonomous Emergency Brake
-
Not Available
Brakes
-
Disc
Cornering Brake Control
-
Standard
Fifth Wheel Prep
-
Not Available
Hydraulic Brake Assist
-
Standard
Spare Wheel Size Type
-
Full-Size
Steering Wheel Cruise Controls
-
Not Available
Tyre Pressure Display
-
Not Available
Tyre Pressure Monitoring
Standard
Not Available
Wheel Material
-
Not Available
Wheels
-
Not Available
Spec
4 Series Gran Coupé
Quantum Bus
Front Suspension
MacPherson strut
MacPherson Strut
Rear Suspension
Multi-link
Leaf Spring
Front Track Width
-
Not Applicable
Rear Track Width
-
Not Applicable
Power Steering
-
Hydraulic
Steering Column
-
Tilt
Front Spring Type
-
MacPherson Strut
Rear Spring Type
-
Leaf Spring
Front Anti-Roll Bar
-
Front
Front Suspension Type
MacPherson strut
MacPherson Strut
MagneRide Damping
-
Not Available
Rear Axle Type
-
Leaf Spring
Rear Suspension Type
Multi-link
Leaf Spring
Suspension
-
MacPherson Strut
Spec
4 Series Gran Coupé
Quantum Bus
CO2 Emissions
191 g/km
215 g/km
Hybrid System Type
-
Not Available
Fuel Octane Requirement
-
Diesel
Euro Emission Standard
-
Euro 4
Idle CO2 Output
-
215
CO2 Emissions G Km
-
215
Spec
4 Series Gran Coupé
Quantum Bus
Service Plan
5 years / 100000 km BMW Motorplan
3 Years / 45,000 km
Battery Warranty
-
5 Years / 150,000 km
Maintenance Plan
-
3 Years / 45,000 km
Service Plan Duration
5 years / 100000 km BMW Motorplan
3 Years / 45,000 km
Service Plan Distance
5 years / 100000 km BMW Motorplan
3 Years / 45,000 km
Spec
4 Series Gran Coupé
Quantum Bus
Ownership Role
Private, business and fleet
Base
Price Zar
1497500 ZAR
895000 ZAR
Pricing Role
Current recommended retail price
Current listed price
Starting Price
1497500
895000
Starting Price Zar
1497500
895000
Spec
4 Series Gran Coupé
Quantum Bus
Warranty
Yes
3 years / 100 000 km
Warranty Years
Yes
3 years / 100 000 km
Warranty Kilometers
Yes
3 years / 100 000 km
Roadside Assistance
-
3 Years
Basic Warranty
Yes
3 years / 100 000 km
Roadside Assistance
-
3 Years
Warranty Roadside Assistance
-
3 Years
Spec
4 Series Gran Coupé
Quantum Bus
Real-world City Mileage Min
-
10 l/100km
Real-world City Mileage Max
-
12.5 l/100km
Real-world Highway Mileage Min
-
8.5 l/100km
Real-world Highway Mileage Max
-
10 l/100km
Owner Review Count
-
6
In depth: how these cars differ
This 4 Series Gran Coupé and Quantum Bus comparison uses the exact derivatives selected above for South Africa. The catalogue index covers performance, efficiency, safety equipment, practicality and ownership cover only where comparable source-backed fields are present.
Performance index: 4 Series Gran Coupé 97 vs Quantum Bus 37.
Efficiency index: 4 Series Gran Coupé 49 vs Quantum Bus 46.
Safety-equipment index: 4 Series Gran Coupé 92 vs Quantum Bus 44.
Practicality index: 4 Series Gran Coupé 48 vs Quantum Bus 80.
Ownership-cover index: 4 Series Gran Coupé not separately scored vs Quantum Bus 43.
These figures are Hagalu catalogue-comparison indicators, not customer ratings, crash-test scores, resale guarantees or a substitute for a road test. Each page shows its weighted source coverage beside the result.
Model imagery
4 Series Gran Coupé and Quantum Bus image comparison
Open an image for its full canonical file or visit the model page for the complete vehicle record.
A transparent comparison of published catalogue fields. This is not a road-test score, owner rating or editorial review rating, and it appears only when every vehicle clears the same comparable-data threshold.
Evidence / 100
Evidence-index readout
4 Series Gran Coupé leads by 23 points
4 Series Gran Coupé holds a noticeable catalogue-index lead over Quantum Bus.
Performance
4 Series Gran Coupé +60
Efficiency
4 Series Gran Coupé +3
Safety
4 Series Gran Coupé +48
Practicality
Quantum Bus +32
Moderate difference in the source-backed catalogue index.
Why this scoreView full breakdown
Evidence-index leader
4 Series Gran Coupé
Performance
97/100
Efficiency
49/100
Safety
92/100
Practicality
48/100
Quantum Bus
Performance
37/100
Efficiency
46/100
Safety
44/100
Practicality
80/100
Ownership
43/100
What the evidence means
Evidence indexBMW 4 Series Gran Coupé
leads the specification evidence index with 73 pts
vs 50 pts for Quantum Bus
In Hagalu's specification evidence index, 4 Series Gran Coupé leads. However, Quantum Bus may suit buyers prioritising different confirmed fields. Ultimately, the right choice depends on your driving priorities in South Africa.
Related comparisons
Continue with closely related South Africa models and comparable body styles.
There is no universal winner. Use the comparison table to match the models and available derivatives in South Africa on price, safety equipment, space, powertrain and ownership cover. The category indicators summarise published catalogue data; they are not a road test or customer rating.
Compare the published consumption or mileage rows for the exact derivatives using the same unit and test basis. A catalogue figure is useful for like-for-like comparison, but traffic, speed, load, weather and driving style can change actual fuel use.
Compare only equipment explicitly listed for each derivative, including airbags, stability control and driver-assistance systems. Confirm the exact trim with the manufacturer, and treat any independent crash-test result separately because equipment and ratings can differ by market.
A reliable five-year total cannot be calculated from catalogue data alone. Add the exact purchase and finance cost, fuel or electricity, insurance quotes, scheduled servicing, tyres and expected resale value. Check whether the selected derivative includes a service or maintenance plan.
Use the seating, boot or load-space, ISOFIX and safety rows as a first check. Then test the exact cars with your child seats, passengers and typical luggage, because published dimensions do not show every access or comfort difference.
Compare the published power, torque and 0–100 km/h rows when they are available for both exact derivatives. Vehicle weight, gearing and power delivery also matter, so catalogue outputs alone do not establish real-world overtaking or response.
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