BMW M4 vs Porsche 911
A detailed look at how two of Australia's most popular Coupes compare on price, running costs, safety, and everyday livability.
Specifications and pricing correct at time of publishing. Prices are RRP before on-road costs unless stated otherwise. Always confirm with the manufacturer or dealer before purchasing.
Price Breakdown
The BMW M4 starts from $168,700 before on-road costs, while the Porsche 911 opens at $248,400. That makes the BMW M4 the more affordable entry point by $79,700.
Once you factor in stamp duty, registration, CTP insurance, and dealer delivery, expect to add roughly 8-12% on top of the RRP depending on your state. That puts estimated driveaway prices in the ballpark of $185,570 and $273,240 respectively.
Over 5 years, the running costs favour the BMW M4 by roughly $1,425 in fuel alone.
Safety Rundown
Both the BMW M4 and Porsche 911 hold a 5-star ANCAP safety rating.
Where the two diverge is in active safety technology. The BMW M4 packs more ADAS features with 5 out of 10 key systems fitted, compared to 0 in the Porsche 911.
Both include the essentials: a reversing camera.
Feature Showdown
Both come with modern infotainment systems.
The BMW M4 stands out with wireless Apple CarPlay/Android Auto, head-up display, heated front seats, ventilated seats, Harman Kardon audio and ambient lighting that you will not find on the Porsche 911. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The BMW M4 uses a Petrol producing 353kW and 550Nm of torque, sent through a manual to a RWD layout. It covers the 0-100km/h sprint in 3.5 seconds.
The Porsche 911 responds with a Petrol making 290kW and 450Nm, paired to a 8-speed pdk driving the rear wheels. It gets to 100km/h in 4.1 seconds.
The BMW M4 has the clear power advantage at 353kW vs 290kW. In the real-world sprint, the BMW M4 is 0.6s quicker. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The BMW M4 measures 4,801mm long on a 2,857mm wheelbase, 268mm longer than the Porsche 911 at 4,533mm (2,450mm wheelbase). The longer wheelbase on the BMW M4 generally means more rear legroom.
Boot space is 440L in the BMW M4 and 132L in the Porsche 911, giving the BMW M4 a 308L advantage.
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
11.4m diameter
Average
Based on 11.4m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Turning circle ratings
True Cost to Own
Based on 15,000km of annual driving, fuel costs roughly $2,879/year for the BMW M4 and $3,164/year for the Porsche 911. That is a $285 annual difference in favour of the BMW M4.
Estimated annual total: $2,879 (BMW M4) vs $3,164 (Porsche 911). The BMW M4 saves you roughly $285 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 5 years / 999,999km (BMW M4) vs 3 years / 999,999km (Porsche 911). The BMW M4 has longer coverage.
Who Should Buy Which?
Buy the BMW M4 if: You want the lower entry price, prioritise performance, need more boot space, want lower running costs, value a longer warranty, or prefer BMW's approach to design and ownership experience.
Buy the Porsche 911 if: You or prefer Porsche's approach to design and ownership experience.
The Verdict
The BMW M4 takes 6 of 6 key spec categories and comes in at a lower price. The BMW M4 will save you roughly $285 a year in fuel. If boot space matters, the BMW M4 has a clear edge. The BMW M4 adds peace of mind with a longer 5-year warranty. The best pick depends on what you value most. Explore the full specs for each model below.
Common questions
Which is cheapest, BMW M4 and Porsche 911?
The BMW M4 is the cheapest at $168,700 before on-road costs. That undercuts the Porsche 911 by $79,700.
Which is the most fuel-efficient?
The BMW M4 uses the least fuel at 10.1L/100km on the combined cycle.
Which is safest?
They are evenly matched — BMW M4 and Porsche 911 all hold a 5-star ANCAP rating. Compare the active-safety features above to separate them.
Which has the most boot space?
The BMW M4 has the largest boot at 440L.
Which can tow the most?
The BMW M4 has the highest braked towing capacity at 1,800kg.
Which has the best warranty?
The BMW M4 has the longest warranty at 5 years / 1000k km.
Which is the most powerful?
The BMW M4 makes the most power at 353kW. The BMW M4 is quickest to 100km/h in 3.5s.
Disclaimer: All information in this comparison was believed to be correct at the time of publishing (20 April 2026). Prices are manufacturer recommended retail prices (RRP) and may vary by state, dealer, and options. Driveaway costs include estimated on-road costs for Victoria. Fuel economy figures are WLTP/ADR combined cycle. Specifications can change without notice. Always verify with the manufacturer before making a purchase decision. CarSorted does not accept payment for recommendations.
Auto-generated from CarSorted's specification data · 20 April 2026
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