Rolls-Royce Dawn vs BMW M4 Convertible

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.

Includes a historical vehicle

Current, upcoming and historical vehicles can be compared side by side. Historical records keep their verified specifications, while price labels show last-listed context rather than current new-car availability.

Rolls-Royce Dawn Discontinued model
Rolls-Royce Dawn in South Africa

Rolls-Royce Dawn

Dawn Petrol 8-Speed Automatic Discontinued model
No longer sold new historical price not confirmed
Discontinued model Verified historical specifications remain visible for owner and used-car comparisons.
⚡ 420 kW 🔧 820 Nm ⛽ 6.99 km/l
VS
BMW M4 Convertible in South Africa

BMW M4 Convertible

M4 Competition Convertible AWD Petrol 8-Speed Automatic Current
ZAR 2,330,000 ex-showroom
⚡ 390 kW 🔧 650 Nm ⛽ 12.5 km/l
+ Add a 3rd car

Decision summary

Rolls-Royce Dawn vs BMW M4 Convertible: the short answer

Dawn and M4 Convertible are close on the comparable published fields, so buyer priorities should decide.

Five key differences

Exact selected derivatives
Specification Dawn M4 Convertible
Maximum Power Dawn420 kW @ 5250-6000 rpm M4 Convertible390 kW
Maximum Torque Dawn820 Nm @ 1600-4750 rpm M4 Convertible650 Nm @ 2750-5730 rpm
Engine Size Dawn6592 cc M4 Convertible2993 cc
Combined Fuel Economy Dawn6.99 km/l M4 Convertible12.5 km/l
Ground Clearance Dawn149 mm M4 Convertible140 mm

Strongest published figure in that row; no road-test winner is implied.

What Each Car Gets Right (and Wrong)

Dawn

Strengths
  • Nothing stands out clearly here.
Weak Spots
  • Lower fuel efficiency
  • Fewer listed safety features
  • Lower published practicality figures
Best suited to: General Use
Specification evidence leader

M4 Convertible

Strengths
  • Better fuel efficiency
  • Stronger listed safety equipment
  • Stronger published practicality figures
Weak Spots
  • No obvious weak spots to flag.
Best suited to: Published Efficiency Published Practicality

Which One's Right for You?

Dawn

  • Buyers who prefer this derivative's confirmed specification mix

M4 Convertible

  • Buyers prioritising the lower published fuel or energy use
  • Buyers prioritising the more complete listed safety equipment
  • Buyers prioritising the stronger published space and capacity figures

Full Specs, Side by Side

Archived cars use verified historical spec records. Rows remain comparable; unavailable historical values are shown plainly rather than estimated.

Spec Dawn M4 Convertible
Model Introduced Year 2016 2021
Generation Dawn four-seat convertible; this archive profile uses the MY17 World specification corroborated by a February 2018 South African road test. G83 full-M soft-top convertible with M xDrive and body-specific roof and luggage packaging.
Facelift History The MY17 configuration is kept separate from the 2015 launch specification, which published different length, torque, acceleration, consumption and CO2 figures. Current updated G83-generation M4 Competition Convertible in the South African AWD configuration.
Facelift Launched Since 2017 Original current-generation version
Facelift Version Ending 2023 Current
Body Style Convertible Convertible
Model Year 2017 2026
Production Status discontinued active
Segment Ultra-luxury convertible Premium Convertible
Vehicle Type Passenger car Car
Spec Dawn M4 Convertible
Length 5295 mm 4801 mm
Width 1947 mm 1887 mm
Height 1502 mm 1399 mm
Wheelbase 3112 mm 2857 mm
Ground Clearance (Default) 149 mm 140 mm
Ground Clearance (With Full Seating Load) 149 mm 125 mm
Fuel Tank Capacity 82 l 59 l
Boot/Cargo Space 321 l 385 l
Kerb Weight 2560 kg 2000 kg
Gross Vehicle Weight (GVW) 3040 kg 2345 kg
Payload Capacity 480 kg 420 kg
Towing Capacity 0 kg 1600 kg
Seating Capacity 4 seats 4 seats
Number of Rows 2 rows 2 rows
Doors 2 doors 2 doors
Minimum Turning Radius 6.35 m 5.6 m
Front Headroom 1018 mm 987 mm
Rear Headroom 963 mm 947 mm
Front Legroom 1054 mm 1036 mm
Rear Legroom 937 mm 890 mm

In depth: how these cars differ

This Dawn and M4 Convertible 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: Dawn 97 vs M4 Convertible 97.

Efficiency index: Dawn 31 vs M4 Convertible 47.

Safety-equipment index: Dawn 90 vs M4 Convertible 92.

Practicality index: Dawn 52 vs M4 Convertible 53.

Ownership-cover index: Dawn not separately scored vs M4 Convertible 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.

Specification Evidence Index

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

M4 Convertible leads by 4 points

Dawn and M4 Convertible are close on the comparable published fields, so buyer priorities should decide.

Evidence leader 74 /100
Lead 4 points
Data 83% source coverage
74
#1 Evidence leader

M4 Convertible

83% source coverage 2 strong categories
Best at Performance 97 Check Efficiency 47
Performance 97
Efficiency 47
Safety 92
Practicality 53
Leads by 4 points
70
#2

Dawn

76% source coverage 2 strong categories
Best at Performance 97 Check Efficiency 31
Performance 97
Efficiency 31
Safety 90
Practicality 52
Performance 24% Safety 22% Practicality 22% Efficiency 17% Ownership 15%
Category leaders What moves the verdict
Performance Level Efficiency M4 Convertible +16 Safety M4 Convertible +2 Practicality M4 Convertible +1

Close catalogue match. Buyer priorities should decide the outcome.

Why this score View full breakdown
Evidence-index leader

M4 Convertible

Performance 97/100
Efficiency 47/100
Safety 92/100
Practicality 53/100

Dawn

Performance 97/100
Efficiency 31/100
Safety 90/100
Practicality 52/100

What the evidence means

Evidence index BMW M4 Convertible leads the specification evidence index with 74 pts vs 70 pts for Dawn

In Hagalu's specification evidence index, M4 Convertible leads. However, Dawn may suit buyers prioritising different confirmed fields. Ultimately, the right choice depends on your driving priorities in South Africa.

Dawn vs M4 Convertible questions

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.