Porsche 911 vs Mercedes-Benz S-Class
A detailed look at how two of Australia's most popular cars 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.
Porsche 911
From $296,700
Coupe
Petrol
Petrol
290kW
9.4 L/100km
ANCAP: no data
132L
Mercedes-Benz S-Class
From $278,900
Sedan
Petrol
Petrol
280kW
8.4 L/100km
ANCAP: no data
510L
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Price Breakdown
The Porsche 911 starts from $296,700 before on-road costs, while the Mercedes-Benz S-Class opens at $278,900. That makes the Mercedes-Benz S-Class the more affordable entry point by $17,800.
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 $326,370 and $306,790 respectively.
Over 5 years, the running costs favour the Mercedes-Benz S-Class by roughly $1,425 in fuel alone.
Safety Rundown
ANCAP safety ratings have not been published for both models yet. We will update this section when crash test results are available.
Feature Showdown
The Porsche 911 features a 10.9-inch touchscreen paired with a 12.6-inch digital dash, while the Mercedes-Benz S-Class gets a 12.8-inch display and 12.3-inch instruments.
The Mercedes-Benz S-Class counters with wireless Apple CarPlay/Android Auto, head-up display, wireless charging, panoramic roof, heated front seats, ventilated seats, Burmester audio and ambient lighting that the Porsche 911 does not offer. Which feature set matters more depends on your daily routine and priorities.
Interior trim differs: the Porsche 911 gets leather upholstery while the Mercedes-Benz S-Class offers nappa leather. Climate control is 2-zone in the Porsche 911 and 4-zone in the Mercedes-Benz S-Class.
Drivetrain
The Porsche 911 uses a Petrol producing 290kW and 450Nm of torque, sent through a 8-speed pdk to a RWD layout. It covers the 0-100km/h sprint in 4.1 seconds.
The Mercedes-Benz S-Class responds with a Petrol making 280kW and 500Nm, paired to a automatic driving all four wheels. It gets to 100km/h in 4.9 seconds.
The Porsche 911 has the clear power advantage at 290kW vs 280kW. In the real-world sprint, the Porsche 911 is 0.8s quicker. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The Porsche 911 measures 4,533mm long on a 2,450mm wheelbase, 646mm shorter than the Mercedes-Benz S-Class at 5,179mm (3,106mm wheelbase). The longer wheelbase on the Mercedes-Benz S-Class generally means more rear legroom.
Boot space is 132L in the Porsche 911 and 510L in the Mercedes-Benz S-Class, giving the Mercedes-Benz S-Class a 378L advantage. The Mercedes-Benz S-Class seats 5 vs 4.
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
11.2m to 12.0m
Based on 11.2m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Based on 12.0m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Turning circle ratings
Compare U-turns side by side
Turning Circle · U-turn compare
kerb-to-kerb, 2 cars0 of 2 clear a 7.0 m street in one sweep
Green cars complete the U-turn; amber need a 3-point turn. Drag the slider to test tighter streets.
Standard widths: AU local streets ~5.5–7 m; main roads ~9–12 m.
True Cost to Own
Based on 15,000km of annual driving, fuel costs roughly $2,679/year for the Porsche 911 and $2,394/year for the Mercedes-Benz S-Class. That is a $285 annual difference in favour of the Mercedes-Benz S-Class.
Estimated annual total: $2,679 (Porsche 911) vs $2,394 (Mercedes-Benz S-Class). The Mercedes-Benz S-Class saves you roughly $285 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 3 years / 999,999km (Porsche 911) vs 5 years / 999,999km (Mercedes-Benz S-Class). The Mercedes-Benz S-Class has longer coverage.
Who Should Buy Which?
Buy the Porsche 911 if: You prioritise performance, or prefer Porsche's approach to design and ownership experience.
Buy the Mercedes-Benz S-Class if: You want the lower entry price, need more boot space, want lower running costs, value a longer warranty, or prefer Mercedes-Benz's approach to design and ownership experience.
The Verdict
The Mercedes-Benz S-Class takes 4 of 6 key spec categories and comes in at a lower price. The Mercedes-Benz S-Class will save you roughly $285 a year in fuel. If boot space matters, the Mercedes-Benz S-Class has a clear edge. The Mercedes-Benz S-Class 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, Porsche 911 and Mercedes-Benz S-Class?
The Mercedes-Benz S-Class is the cheapest at $278,900 before on-road costs. That undercuts the Porsche 911 by $17,800.
Which is the most fuel-efficient?
The Mercedes-Benz S-Class uses the least fuel at 8.4L/100km on the combined cycle.
What are the ANCAP safety ratings?
None of Porsche 911 and Mercedes-Benz S-Class carry a published ANCAP rating yet — check back as they are tested.
Which has the most boot space?
The Mercedes-Benz S-Class has the largest boot at 510L.
Which can tow the most?
The Mercedes-Benz S-Class has the highest braked towing capacity at 2,100kg.
Which has the best warranty?
The Mercedes-Benz S-Class has the longest warranty at 5 years / Unlimited.
Which is the most powerful?
The Porsche 911 makes the most power at 290kW. The Porsche 911 is quickest to 100km/h in 4.1s.
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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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