BMW M5 vs Porsche Cayenne

What's the difference?

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BMW M5
BMW M5

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2025 price

Porsche Cayenne
Porsche Cayenne

$144,900 - $376,200

2026 price

Summary

2025 BMW M5
2026 Porsche Cayenne
Safety Rating

Engine Type
Bi Turbo V8, 4.4L
Electric motor type
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Fuel Type
Premium Unleaded/Electric
Vehicle type
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Fuel Efficiency
3.0L/100km (combined)

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Energy consumption
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Electric range
67 km

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Battery capacity
22.10 kWh

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Seating
5

5
Dislikes
  • Awkward boot
  • Brake and steering feel
  • Low on hooliganism

  • No new petrol or hybrid variant (yet)
  • Coupe bodystyle loses practicality
  • Off-road bodykit looks awkward
2025 BMW M5 Summary

Balancing luxury car comfort, hot hatch agility and supercar speed is no easy task, yet that is what made the six previous generations of BMW's M5 so iconic. 

In seventh-generation ‘G90’ guise, the M5 has another skeleton in the cupboard: the toughest emissions regulations that Europe, and now Australia, have ever seen.

A twin-turbo V8 was untenable and going battery electric was not an option. Plug-in hybrid was the only answer. For the new M5, BMW combined a revised 4.4-litre ‘S68’ bent eight with a punchy electric motor for 535kW and 1000Nm. 

Problem is, the G90 is widely acknowledged as one of the greatest BMW M cars of all time, especially in CS trim. And thanks to a circa-600kg weight hike to nearly 2500kg, the new M5's 0-100km/h claim is actually slower than the old 'F90' M5. 

Doesn’t exactly sound like a big leap forward, does it?

A drive through the Central West of NSW and around the iconic Mount Panorama racing circuit gave us answers to two questions. Does the M5 work on Australia roads, and does BMW M's latest super-sedan represent progress?

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2026 Porsche Cayenne Summary

No good deed goes unpunished.

Porsche, a brand synonymous with petrol-guzzling sports cars, tried to do the right thing and make a nearly wholesale switch to electric vehicles by the end of the decade. The problem was, while this made governments happy, it didn’t sit well with customers.

Porsche’s all-electric Macan is enduring a torrid 2026, with sales down over 75 per cent now that all the petrol-engined options are gone. 

But that hasn’t stopped the German brand trying again with an all-electric Cayenne. However, there are some key differences that mean this latest electric Porsche won’t suffer the same fate.

Namely, the petrol-powered and hybrid versions aren’t going anywhere and new versions are rumoured to be coming in the not-too-distant future.

For now though, we have this all-new electric Cayenne - so how does it stack up to its predecessors as the sports car brand’s big SUV?  And will it be second time lucky for Porsche’s electric transition? Based on two rather unorthodox days of test driving, the verdict might surprise you…

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Deep dive comparison

2025 BMW M5 2026 Porsche Cayenne

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