Porsche Cayenne S Diesel vs BMW X5 M50d

Porsche Cayenne S Diesel vs BMW X5 M50d
17 Jun, 2013 11:00am

The all-new Porsche Cayenne S Diesel packs V8 power, but can it outmuscle the straight-six-engined BMW X5?

Porsche is famous for its low-slung sports cars, but its biggest-selling model in the UK is the Cayenne. The SUV is now into its second generation, and its once controversial looks have matured into an acceptable upmarket shape, while a classy cabin and superb handling have made it our class favourite.

But if there’s one chink in its armour, it’s the fact that the V6 diesel model lacks the warp-speed performance people expect from a Porsche. This has now been addressed by the new twin-turbo 4.2-litre V8 S Diesel, which has 850Nm of torque – that’s 150Nm more than the petrol Cayenne Turbo.

However, this isn’t the only high-performance diesel SUV on the market. The BMW X5 M50d Sport wears the hallowed M badge and produces a near-identical 375bhp from its three-stage turbo 3.0-litre straight-six engine. And with an all-new X5 just around the corner, this blisteringly quick range-topper is out to prove that there’s still life in the old dog yet. So which of our rapid, high-riding contenders makes more sense?


If you want a large SUV with serious performance, you no longer have to choose a thirsty petrol car. Both of our diesel-engined test contenders here have the mid-range grunt and thrilling acceleration to rival sports cars, yet they combine this performance with practical interiors, excellent refinement and relatively low emissions.

Porsche’s new Cayenne S Diesel is cheaper and faster than the X5 M50d, but more importantly it’s much better to drive – with sharper handling and better steering, as well as class-leading refinement and a first-rate cabin.

Plus, many buyers will find the diesel’s subtle styling more appealing than that of the more ostentatious petrol versions Porsche sells. So the newcomer is our pick of the range.

The X5 still has a lot going for it, though. Its practical and spacious cabin is a big plus point, and even though it’s showing its age, build quality inside is still strong, too. But it proves just how much the class has moved on that BMW’s former benchmark is now dynamically outclassed by the newer, better-looking and more upmarket Porsche.

Mixing luxury, practicality, performance and driver involvement, the Cayenne S Diesel is an SUV star – and a deserving winner in this test.

Disqus - noscript

We can look forward to the Mother of All Tests, Porsche Cayenne S Diesel vs Range Rover Sport....... not exactly a sports car showdown...

Good idea! Make it a 3 way test, the BMW X5 M50d Sport should be in there to.

What's the point of a £60,000 diesel?

This test seems a little pointless as the new X5 M50d is out in August and it an improvement in both performance and MPG. There pitching a six pot against an 8 pot

BMW X-5 is a great car. So is Porsche Cayenne. Since the comparison doesn't involve the new X-5 model hence the Cayenne takes a slight lead, not because the Porsche engine or handling are better than the BMW but mainly because of the sumptuous and driver-focussed cabin.

porsche engine and handling are far away better than the bmw
there is no comparison

Can't wait to see these Toys off road against a Range Rover for a week long test in the "Woods" in All conditions with factory sold tires as is .

Prices and running costs are sky high and why add boxy bodywork to ruin a masterpiece.

Would rather have the cheaper Touareg R line spec save yourself £20k

For more breaking car news and reviews, subscribe to Auto Express - available as a weekly magazine and on your iPad. We'll give you 6 issues for £1 and a free gift!

Sponsored Links