From £47,390
Diesel Cayenne is a radical – but competent – departure for Porsche

Our Verdict

Porsche Cayenne

Even those who don't love the Porsche Cayenne should be impressed by its dynamic ability

3 February 2009

What is it?

This is the Porsche Cayenne Diesel, a car that Porsche’s chairman, Wendelin Wiedeking, once proclaimed the company would never build. The Porsche Cayenne Diesel slots neatly between the base Porsche Cayenne and the Porsche Cayenne S. The Cayenne Diesel also marks a radical departure for Porsche, being its first-ever production diesel car.

Not that you’re likely to notice. Porsche clearly remains uncomfortable about introducing a diesel, so the Porsche Cayenne Diesel is visually identical to the base Cayenne. There’s not even a badge to give the game away.

It is not until you climb behind the Porsche Cayenne Diesel’s three-spoke steering wheel that you are confronted with the first clues to the turbocharged 3.0-litre V6 common-rail diesel engine under the bonnet.

First up, there is the rev counter that reaches to just 4600rpm. There’s also the characteristic diesel chatter on start-up. It is not the sort of sound you normally associate with a Porsche, but given that the Cayenne is closely related to the Volkswagen Touareg and Audi Q7 – alongside which it is partly assembled – it is not surprising. Not when three quarters of all big off-roaders sold across Europe last year were diesel.

You won’t find any mention of Audi’s Gyor factory in Hungary in the press kit. But that’s where the Cayenne diesel’s engine is produced. With piezo-controlled injector valves that enable the fuel to be delivered to each cylinder at 1800bar of pressure and a variable-geometry turbocharger, the unit kicks out 240bhp at 4000rpm and 405lb ft of torque at 2000rpm.

What’s it like?

While lacking the inherent refinement and enthusiasm of BMW’s standard-setting twin-turbocharged 3.0-litre straight six, the Audi-sourced motor in the Porsche Cayenne Diesel is reasonably smooth and offers decent in-gear poke. It’s a pity the V6 diesel is so vocal, though.

The six-speed auto, an Aisin unit modified to handle the torque of the engine, is decisive, fast and smooth. It provides a broad spread of performance. Strong low-end acceleration combines with excellent cruising qualities to make the Cayenne Diesel a very rounded proposition. Flick the Sport button and the changes are set significantly quicker, while the throttle response is also sharpened.

At 2240kg, the Porsche Cayenne Diesel is no featherweight. Still, Porsche is proud that it has been able to peg the increase over the petrol Cayenne at just 70kg – included in which is an additional 26kg in engine weight, 29kg of sound deadening and 13kg in a beefed-up torque converter. Odd, then, that its claimed 0-62mph time of 8.3sec is exactly the same as the similarly powered Volkswagen Touareg, which is lumbered with a further 90kg.

The Porsche cayenne Diesel’s 133mph top speed is 3mph quicker than its sibling’s, thanks to more favourable aerodynamics and a smaller frontal area. And with combined fuel consumption of more than 30mpg and a CO2 rating of 244g/km (providing it with EU4 compatibility), this is easily the most economical and cleanest model in the Cayenne line-up.

For such a big car the Cayenne Diesel’s handling is composed, the added weight of the engine and associated changes barely noticeable on open back roads. And with all that torque and four-wheel drive to exploit it, you can confidently stomp out of bends with all the enthusiasm of larger petrol engine Cayenne models.

Should I buy one?

There is a lot to commend the Cayenne diesel. But the fact that it will be replaced within a year by a more modern successor, with a cleaner and even more economical engine, makes it a car with a questionable future as far as depreciation is concerned.

Still, for most potential owners, the only thing of real consequence will be that black, red and gold emblem affixed to the nose. It might be a diesel, but this Cayenne is still a Porsche, and the pull of that badge is as strong as ever.

Join the debate


3 February 2009

Now that Porsche has finally done the un-thinkable, can we please have a high revving, 4 cylinder Boxster....


3 February 2009

I know why, I just fail to see the point.

Possibly the least Porsche Porsche ever.



It's all about the twisties........

3 February 2009

Seeing as Porsche have since bought VW, hopefully they won't feel obliged to replace the Cayenne!!

3 February 2009

Come on Porsche bores! Surely you can do better that this? Where is your spirit of indignation? A diesel? In a Porsche? : )

3 February 2009

I can see why people have a problem but the reality is that porsche is not as profitable as it was for both the manufacturer and the dealers and it IS needed. This pays for other projects and if that is the case then so be it. The indignation will be forgotten and in the future viewed as short sighted as porsche is a volume manufacturer and this is what they do.

3 February 2009

When will we have the next 911 TDI 2.0?

No comment...

It must be seen like an utilitarian vehicle. Porsche made well farm tractors in the past.

3 February 2009

I just cant get excited about this car!! and with an audi diesel its just automotive garbage!!!

If they had developed there own flat 6 diesel that might be something worth mentioning, but this is just a load of c*ap ild rather have an X6!!

3 February 2009

[quote davidv11]If they had developed there own flat 6 diesel that might be something worth mentioning[/quote]

Why not share development costs with Subaru? How difficult would it be for the 4 cylinder boxer diesel to have two cylinders added? They've not even twin turbo-charged the audi diesel to make things a bit more exciting.

Then again, I'm biased - I hate the car and I think they could have done much better with the diesel, as most of the manufacturers I have respect for actually developed their own (Honda, Subaru)

3 February 2009

[quote davidv11]

I just cant get excited about this car!! and with an audi diesel its just automotive garbage!!!


I thought the Audi 3.0 TDI engine was well regarded. What's wrong with it exactly? It's basically a Toureg anyway so a VW group engine isn't going to make much difference.

As for the car itself, I don't like it but if Porsche make money from it and can therefore continue to produce 1st class sports cars I don't care.

3 February 2009

[quote Lee23404]

As for the car itself, I don't like it but if Porsche make money from it and can therefore continue to produce 1st class sports cars I don't care.




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