Denza B5 vs Mazda CX-70
A detailed look at how two of Australia's most popular SUVs 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.
Plug-in hybrid fuel economy is shown as a hybrid (battery depleted) so it compares fairly with the other car. A PHEV's official "combined" figure assumes you start every trip fully charged, so real-world economy depends on how often you plug in. Electric range shows how far it goes before the petrol engine is needed.
Price Breakdown
The Denza B5 starts from $74,990 before on-road costs, while the Mazda CX-70 opens at $76,720. That makes the Denza B5 the more affordable entry point by $1,730.
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 $82,489 and $84,392 respectively.
The Denza B5 qualifies for FBT exemption as an electric vehicle, which can dramatically reduce the effective cost for novated lease buyers. The Mazda CX-70, as a petrol model, does not qualify.
Over 5 years, the running costs favour the Denza B5 by roughly $9,265 in fuel alone.
Safety Rundown
Both the Denza B5 and Mazda CX-70 hold a 5-star ANCAP safety rating.
Where the two diverge is in active safety technology. The Mazda CX-70 packs more ADAS features with 7 out of 10 key systems fitted, compared to 4 in the Denza B5.
Both include the essentials: autonomous emergency braking, lane keep assist, adaptive cruise control. The Mazda CX-70 adds a 360-degree camera that the Denza B5 misses.
Feature Showdown
The Denza B5 features a 15.6-inch touchscreen paired with a 12.3-inch digital dash, while the Mazda CX-70 gets a 12.3-inch display and 12.3-inch instruments.
The Denza B5 stands out with Apple CarPlay and Devialet audio that you will not find on the Mazda CX-70. The Mazda CX-70 counters with head-up display and Bose audio. Which feature set matters more depends on your daily routine and priorities.
Drivetrain
The Denza B5 uses a Petrol Turbo PHEV producing 400kW and 760Nm of torque, sent through a 1-speed auto to a AWD layout. It covers the 0-100km/h sprint in 4.8 seconds.
The Mazda CX-70 responds with a Petrol making 254kW and 500Nm, paired to a automatic driving all four wheels.
The Denza B5 has the clear power advantage at 400kW vs 254kW. For most buyers, the way each car feels day-to-day matters more than outright acceleration.
Space & Comfort
The Denza B5 measures 4,888mm long on a 2,800mm wheelbase, 232mm shorter than the Mazda CX-70 at 5,120mm (3,120mm wheelbase). The longer wheelbase on the Mazda CX-70 generally means more rear legroom.
Boot space is 470L in the Denza B5 and 598L in the Mazda CX-70, giving the Mazda CX-70 a 128L advantage.
For towing, the Denza B5 leads with a 3,000kg braked capacity vs 2,500kg. That 500kg difference matters if you regularly hitch up.
Turning Circle
Kerb-to-kerb diameter. Smaller turns easier in tight carparks and U-turns.
11.8m to 11.8m
Based on 11.8m turning circle:
- U-turn on standard street (7m+ wide)
- Standard parking bay
- Tight carparks
- Narrow laneways
Based on 11.8m 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 $456/year for the Denza B5 and $2,309/year for the Mazda CX-70. That is a $1,853 annual difference in favour of the Denza B5.
Estimated annual total: $456 (Denza B5) vs $2,309 (Mazda CX-70). The Denza B5 saves you roughly $1,853 per year in total ownership costs. Use our Fuel Cost Calculator to estimate based on your driving.
Warranty: 6 years / 150,000km (Denza B5) vs 5 years / 999,999km (Mazda CX-70). The Denza B5 has longer coverage.
Who Should Buy Which?
Buy the Denza B5 if: You want the lower entry price, prioritise performance, want lower running costs, value a longer warranty, need stronger towing, or prefer Denza's approach to design and ownership experience.
Buy the Mazda CX-70 if: You need more boot space, or prefer Mazda's approach to design and ownership experience.
The Verdict
The Denza B5 takes 4 of 6 key spec categories and comes in at a lower price. The Denza B5 will save you roughly $1,853 a year in fuel. If boot space matters, the Mazda CX-70 has a clear edge. The Denza B5 adds peace of mind with a longer 6-year warranty. The best pick depends on what you value most. Explore the full specs for each model below.
Common questions
Which is cheapest, Denza B5 and Mazda CX-70?
The Denza B5 is the cheapest at $74,990 before on-road costs. That undercuts the Mazda CX-70 by $1,730.
Which is the most fuel-efficient?
The Denza B5 uses the least fuel at 1.9L/100km on the combined cycle.
Which is safest?
They are evenly matched — Denza B5 and Mazda CX-70 all hold a 5-star ANCAP rating. Compare the active-safety features above to separate them.
Which has the most boot space?
The Mazda CX-70 has the largest boot at 598L.
Which can tow the most?
The Denza B5 has the highest braked towing capacity at 3,000kg.
Which has the best warranty?
The Denza B5 has the longest warranty at 6 years / 150k km.
Which is the most powerful?
The Denza B5 makes the most power at 400kW.
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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