Mercedes-Benz AMG GT vs Land Rover Defender OCTA
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.
Mercedes-Benz AMG GT
From $339,900
Coupe
Petrol
430kW
13 L/100km
5★ ANCAP
321L
Land Rover Defender OCTA
From $304,500
SUV
4.4L V8 Twin-Turbo Petrol Mild Hybrid
467kW
13.1 L/100km
5★ ANCAP
972L
Price Breakdown
The Mercedes-Benz AMG GT starts from $339,900 before on-road costs, while the Land Rover Defender OCTA opens at $304,500. That makes the Land Rover Defender OCTA the more affordable entry point by $35,400.
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 $373,890 and $334,950 respectively.
Over 5 years, the running costs are nearly identical since both have similar efficiency.
Safety Rundown
Both the Mercedes-Benz AMG GT and Land Rover Defender OCTA hold a 5-star ANCAP safety rating.
Where the two diverge is in active safety technology. The Land Rover Defender OCTA packs more ADAS features with 7 out of 10 key systems fitted, compared to 6 in the Mercedes-Benz AMG GT.
Both include the essentials: autonomous emergency braking, lane keep assist, adaptive cruise control, a reversing camera. The Land Rover Defender OCTA adds a 360-degree camera that the Mercedes-Benz AMG GT misses.
Feature Showdown
Both come with modern infotainment systems. Apple CarPlay and Android Auto are standard across both.
The Mercedes-Benz AMG GT stands out with Apple CarPlay, head-up display and Burmester audio that you will not find on the Land Rover Defender OCTA. The Land Rover Defender OCTA counters with wireless Apple CarPlay/Android Auto, wireless charging, Meridian audio and ambient lighting. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The Mercedes-Benz AMG GT uses a Petrol producing 430kW and 700Nm of torque, sent through a 9-speed auto to a AWD layout. It covers the 0-100km/h sprint in 3.2 seconds.
The Land Rover Defender OCTA responds with a 4.4L V8 Twin-Turbo Petrol Mild Hybrid making 467kW and 750Nm, paired to a 8-speed automatic driving all four wheels. It gets to 100km/h in 4 seconds.
The Land Rover Defender OCTA has the clear power advantage at 467kW vs 430kW. In the real-world sprint, the Mercedes-Benz AMG GT is 0.8s quicker. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The Mercedes-Benz AMG GT measures 4,728mm long on a 2,700mm wheelbase, 85mm shorter than the Land Rover Defender OCTA at 4,813mm (3,023mm wheelbase). The longer wheelbase on the Land Rover Defender OCTA generally means more rear legroom.
Boot space is 321L in the Mercedes-Benz AMG GT and 972L in the Land Rover Defender OCTA, giving the Land Rover Defender OCTA a 651L advantage. The Land Rover Defender OCTA seats 5 vs 4.
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
12.8m diameter
Large
Based on 12.8m 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 $3,705/year for the Mercedes-Benz AMG GT and $3,734/year for the Land Rover Defender OCTA. That is a $29 annual difference in favour of the Mercedes-Benz AMG GT.
Estimated annual total: $3,705 (Mercedes-Benz AMG GT) vs $3,734 (Land Rover Defender OCTA). The Mercedes-Benz AMG GT saves you roughly $29 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 5 years / 999,999km (Mercedes-Benz AMG GT) vs 5 years / 999,999km (Land Rover Defender OCTA). Both match on warranty length.
Who Should Buy Which?
Buy the Mercedes-Benz AMG GT if: You want lower running costs, or prefer Mercedes-Benz's approach to design and ownership experience.
Buy the Land Rover Defender OCTA if: You want the lower entry price, prioritise performance, need more boot space, or prefer Land Rover's approach to design and ownership experience.
The Verdict
The Land Rover Defender OCTA takes 3 of 5 key spec categories and comes in at a lower price. The Mercedes-Benz AMG GT will save you roughly $29 a year in fuel. If boot space matters, the Land Rover Defender OCTA has a clear edge. The best pick depends on what you value most. Explore the full specs for each model below.
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.
Published by CarSorted Editorial Team · 20 April 2026
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