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.
M4 Convertible and RX are close on the comparable published fields, so buyer priorities should decide.
RX starts ZAR 813,500 cheaperM4 Convertible from ZAR 2,330,000 · RX from ZAR 1,516,500
Five key differences
Exact selected derivatives
Swipe sideways to compare every column
Specification
M4 Convertible
RX
Maximum Power
M4 Convertible390 kW
RX205 kW @ 6000 rpm
Maximum Torque
M4 Convertible650 Nm @ 2750-5730 rpm
RX430 Nm
Engine Size
M4 Convertible2993 cc
RX2400 cc
Combined Fuel Economy
M4 Convertible12.5 km/l
RX11.5 km/l
Ground Clearance
M4 Convertible140 mm
RX185 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 M4 Convertible
M4 Competition Convertible AWD
Hagalu editorial rating
3.6/5★★★★★★★★★★
Desk research · Exact variant
Hagalu Editorial Team ·
Editorial assessment, not a customer rating. Not road-tested for this review.
Siren/ Alarm,Immobiliser,Intrusion Sensor,Tilt Sensor,Ultra-Wide Band
Seatbelt Warning All Seats
Standard
Front + Rear/ Buzzer + Light
Front Parking Sensors
Yes
Standard Intelligent Clearance Sonar,Rear Cross Traffic Alert + Braking
AEB
Yes
Standard
BA
Standard
Standard
Brake Override System
Yes
-
Curtain Airbags
Yes
Standard
Driver Airbag
Yes
Standard
EBD
Standard
Standard
Engine Immobiliser
Standard
Siren/ Alarm,Immobiliser,Intrusion Sensor,Tilt Sensor,Ultra-Wide Band
Hill Hold
Standard
Standard
Passenger Airbag
Yes
Standard
Rear Cross Traffic Alert
Yes
-
Seatbelt Pretensioners
Yes
ELR,Pretensioner,Force Limiter,Tension Reducer -
Seatbelt Reminder
Standard
Front + Rear/ Buzzer + Light
Side Airbags
Yes
Standard
Stability Control
Standard
Standard
TCS
Standard
Standard,,
Knee Airbag
Yes
Standard
ABS EBD
Standard
Standard
Alarm System
-
Siren/ Alarm,Immobiliser,Intrusion Sensor,Tilt Sensor,Ultra-Wide Band
Anti Theft Alarm
-
Siren/ Alarm,Immobiliser,Intrusion Sensor,Tilt Sensor,Ultra-Wide Band
Spec
M4 Convertible
RX
Cruise Control
Yes
Standard Adaptive,All Speed
Adaptive Cruise Control
Yes
Standard Adaptive,All Speed
Lane Keep Assist
Yes
Standard Steering Vibration,Lane Trace Assist
Lane Departure Warning
Yes
Standard Steering Vibration,Lane Trace Assist
Blind Spot Monitoring
Yes
Standard With Rear Cross Traffic Alert,Safe Exit Assist
Rear Cross Traffic Alert
Yes
-
Parking Sensors
Yes
Standard Intelligent Clearance Sonar,Rear Cross Traffic Alert + Braking
Rear View Camera
Yes
Display Audio// Panoramic View Monitor,Washer
360 Degree Camera
Yes
Display Audio// Panoramic View Monitor,Washer
Autonomous Emergency Braking
Yes
Standard
Driver Fatigue Alert
Yes
-
Traffic Sign Recognition
Yes
Standard
Auto Highbeam
Standard
Standard
Auto Wipers
Yes
Auto,Rainsensing,Time adjustable
Rear Parking Sensors
Yes
Standard Intelligent Clearance Sonar,Rear Cross Traffic Alert + Braking
Reverse Camera
Yes
Display Audio// Panoramic View Monitor,Washer
Adaptive Cruise Control
Yes
Standard Adaptive,All Speed
Park Assist
Parking Assist Plus
-
Around View Monitor
Yes
Display Audio// Panoramic View Monitor,Washer
Blind Spot Warning
Yes
Standard With Rear Cross Traffic Alert,Safe Exit Assist
Forward Collision Warning
Yes
Standard
Spec
M4 Convertible
RX
Seat Material
Leather 'Merino', with extended contents , Kyalami Orange/Black
F SPORT
Heated Seats
Front
Standard Front and Rear
Ventilated Seats
Front
Standard Front and Rear
Ambient Lighting
Yes
Standard
Steering Wheel Material
Yes
3 Spoke/ F SPORT,Heated
60 40 Split Seat
Yes
40:20:40 - Power
Driver Seat Adjustment
Electric with driver memory
Driver + Passenger Power// Driver Memory
Passenger Seat Adjustment
Electric multi-way
Driver + Passenger Power// Driver Memory
Seat Trim
M Sport seats
F SPORT
Seat Adjustment
-
Driver + Passenger Power// Driver Memory
Folding Rear Seats
-
40:20:40 - Power
Rear Armrest
-
Standard
Cup Holders
-
Standard 4
Instrument Cluster Type
-
Standard TFT Colour
Driver Lumbar Support
-
Driver 2-way/ Passenger 2-way
Spec
M4 Convertible
RX
Climate Control
Standard
Auto 3-Zone,Nano
Power Windows
Standard
All/ All One Touch
Keyless Entry
Comfort Access
Standard Smart Entry
Push Button Start
Yes
Push Start
Wireless Charging
Standard
Standard
Sunroof
Panoramic
Tilt & Slide,Panoramic
Electric Tailgate
No
Standard Power and Handsfree
Rain Sensing Wipers
Yes
Standard
AC Type
Standard
Auto 3-Zone,Nano
Load Bed Length
-
Not Applicable
Load Bed Width
-
Not Applicable
Heads Up Display
-
Standard
Air Conditioning
Standard
Auto 3-Zone,Nano
Loadbox Length Mm
-
Not Applicable
Loadbox Width Mm
-
Not Applicable
Spec
M4 Convertible
RX
Infotainment System
Widescreen Display
Mark Levinson/ EMV,DAB
Apple CarPlay
Yes
-
Android Auto
Yes
-
Bluetooth Connectivity
Yes
Standard
Number of Speakers
6
Standard 21
Digital Instrument Cluster
BMW Live Cockpit Professional (includes head-up display)
Standard TFT Colour
USB Ports
2
Standard 5PCs
Infotainment Screen
14.9
Mark Levinson/ EMV,DAB
Touchscreen
14.9
Mark Levinson/ EMV,DAB
Navigation System
-
Standard/ EMV
Infotainment Screen Size
14.9
Mark Levinson/ EMV,DAB
Audio Speakers
6
Standard 21
Audio System
-
Mark Levinson/ EMV,DAB
Front Rear USB Charge Ports
-
Standard 5PCs
Connected Services
-
Standard
Spec
M4 Convertible
RX
LED Headlamps
Standard
Standard
Daytime Running Lamps
Standard
Standard LED
Fog Lamps
Yes
Standard LED
Roof Rails
Yes
Standard
Exterior Colour Options
Multiple manufacturer colours
White Nova, Graphite Black GF, Opulent Blue, Sonic Chrome, Sonic Iridium, Sonic Copper
Headlights
Standard
Standard
Panoramic Sunroof
Yes
Tilt & Slide,Panoramic
Spec
M4 Convertible
RX
Approach Angle
Not Applicable
15.0 deg
Departure Angle
Not Applicable
24.0 deg
Wading Depth
Not Applicable
-
Terrain Modes
Not Applicable
-
Locking Differential
Not Applicable
Not Applicable
4WD System Type
Not Applicable
Permanent all-wheel drive
Breakover Angle
Not Applicable
-
Approach Angle Deg
-
15.0 deg
Departure Angle Deg
-
24.0 deg
Ground Clearance Max
-
185 mm
Ground Clearance Min
-
185 mm
Spec
M4 Convertible
RX
Tyre Size
225/50 R18
F:235-50R21 Alloy / R:235-50R21 Alloy
Front Brake Type
M Compound brake, red high-gloss
Ventilated Disc
Rear Brake Type
M Compound brake, red high-gloss
Ventilated Disc
Spare Wheel Type
Tyre repair kit
Space Saver
Wheel Rim Size
19"/20" M forged wheels Double-spoke style 826 M Bicolour Black / MT
21
Handbrake Type
Electronic
Electric
Spec
M4 Convertible
RX
Front Suspension
Adaptive M Suspension
MacPherson -
Rear Suspension
Adaptive M Suspension
Multilink -
Front Track Width
-
1655 mm
Rear Track Width
-
1695 mm
Spec
M4 Convertible
RX
CO2 Emissions
237 g/km
197 g/km
Spec
M4 Convertible
RX
Service Plan
5 years / 100000 km BMW Motorplan
-
Service Interval
-
12 months / 15,000km
Spec
M4 Convertible
RX
Ownership Role
Enthusiast and executive
Private luxury, family and business
Price Zar
2330000 ZAR
1642900 ZAR
Pricing Role
Current recommended retail price
Flagship
Starting Price
2330000
1642900
Starting Price Zar
2330000
1642900
Spec
M4 Convertible
RX
Warranty
Yes
7 years / 105,000km
In depth: how these cars differ
This M4 Convertible and RX 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: M4 Convertible 97 vs RX 85.
Efficiency index: M4 Convertible 47 vs RX 46.
Safety-equipment index: M4 Convertible 92 vs RX 93.
Practicality index: M4 Convertible 53 vs RX 75.
Ownership-cover index: M4 Convertible not separately scored vs RX not separately scored.
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
M4 Convertible and RX 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
RX leads by 3 points
M4 Convertible and RX are close on the comparable published fields, so buyer priorities should decide.
Close catalogue match. Buyer priorities should decide the outcome.
Why this scoreView full breakdown
Evidence-index leader
RX
Performance
85/100
Efficiency
46/100
Safety
93/100
Practicality
75/100
M4 Convertible
Performance
97/100
Efficiency
47/100
Safety
92/100
Practicality
53/100
What the evidence means
Evidence indexLexus RX
leads the specification evidence index with 77 pts
vs 74 pts for M4 Convertible
In Hagalu's specification evidence index, RX leads. However, M4 Convertible 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.
Compare
Request dealer offers
Let's discuss your next car
Share your interest so Hagalu can follow up about quotations and available discounts. The dealer confirms stock, price and terms.
✓
We've Got Your Details!
Your enquiry has reached Hagalu for follow-up. Any dealer offer will be confirmed separately by the seller.